Yog'ochni hosil bo’lishi uchun zarur bo'lgan karbonat angidrid miqdorini aniqlash
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1-topshiriq
O‘ZBEKISTON RESPUBLIKASI AXBOROT TEXNOLOGIYALARI VA KOMMUNIKATSIYALARINI RIVOJLANTIRISH VAZIRLIGI MUHAMMAD AL-XORAZMIY NOMIDAGI TOSHKENT AXBOROT TEXNOLOGIYALARI UNIVERSITETI “Energiya ta’minlash tizimlari” kafedrasi “EKOLOGIYA” fanidan AMALIYOT TOPSHIRIQ №1 Bajardi: Dasturiy injiniring ta’lim yo‘nalishi OEL002 guruh talabasi Muhammadiyev Jasurbek Qabul qildi: Abdullayeva S Toshkent 2020 Variant №20 I. Amaliy topshiriqni bajaring. 1.1-topshiriq. Yog'ochni hosil bo’lishi uchun zarur bo'lgan karbonat angidrid miqdorini aniqlash. Har qanday katta shaharning ekologiyasini, ayniqsa, Toshkent singari ulkan texnogen metropolisni yashil maydonlarsiz tasavvur qilib bo'lmaydi. Ushbu o'ziga xos "shahar o'pkalari" shahar atmosferasini kislorod bilan boyitadi va uni tozalaydi. Yashil o'simliklar tomonidan kislorodni chiqarish jarayoni ularning o'sishi bilan bevosita bog'liqligini tushunish kerak, bu juda sekin jarayon bo’lib: daraxtlar yillar, o'nlab va hatto asrlar davomida o'sib, bir necha daqiqada yonib ketadi. Ushbu ikkala jarayonni turli yo'nalishlarda ketadigan bitta kimyoviy reaktsiya bilan ifodalash mumkin. Bir holda, uglerod atomi kislorod molekulasini biriktirib, karbonat angidrid (CO2) hosil qiladi, boshqasida esa karbonat angidrid molekulasi o'simlik tomonidan so'riladi. Shu bilan birga u parchalanadi: uglerod atomi yog'och hosil bo'lishiga xizmat qiladi va kislorod molekulasi atmosferaga chiqadi. Ya'ni, yog'ochni shakllantirish jarayonida kislorod yon mahsulot hisoblanadi. Tabiiyki, yog'och nafaqat ugleroddan tashkil topmaydi. Har bir o'simlik ma'lum miqdorda suv va mineral tuzlarni o'z ichiga oladi. Ma'lumki, yangi kesilgan o'tin yomon yonadi va quyosh qizdirganidan keyin ko'p miqdordagi suv bug'lari chiqadi, yonayotgan ho'l yog'ochdan chiqqan tutunni uzoqdan yaqqol ko'rinib turadi. Yonayotgan o'tinning olov rangi odatda sariq rangga ega, chunki mineral tuzlar orasida natriy tuzlari eng ko'p uchraydi, ya'ni uning ionlari olovni sariq rangini hosil qiladi. Aagar daraxt kaliy tuzlariga boy tuproqlarda o'sgan bo'lsa undan o'tin binafsha akslar bilan alanga beradi. Amaliy topshiriqni bajarish uchun siz daraxt tanasining massasini hisoblashingiz kerak bo’ladi. Bunday holda, daraxtning shakli silindr shakliga teng deb qabul qilinadi. Shuning uchun, silindr hajmini hisoblash va hosil bo'lgan qiymatni yog'och zichligiga ko'paytirish kerak. Keyinchalik, kimyoviy reaktsiyada ishtirok etadigan moddalar massasini hisoblash qoidasini (quyida keltirilgan hisoblash misolida batafsil ko'rib chiqilgan) va gaz holatining qo'shma qonunini qo'llashingiz kerak. 1.1. Topshiriqni bajarish uchun misol Misol. Normal sharoitda quyidagi parametrlarga ega daraxtni o'stirish uchun qancha hajmda o'simlik karbonat angidrid gazini o'zlashtirishi kerak: daraxt diametri D = 0,8 m, balandligi h = 15 m, yog'och zichligi ρ = 0,08 m3. Biz barcha yog'ochni ugleroddan tayyorlangan va daraxt tanasi silindrsimon shaklga ega deb taxmin qilamiz. Hisoblash: Daraxtning massasini (m) aniqlaymiz. Buning uchun ko’ndalang kesimi (πr2), balandligi (h) (r radius D/2=0,4m), va zichlikni (ρ) ko'paytiramiz. Ya'ni,
yoki (1.1) Karbonat angidriddan o'tin hosil bo'lishi reaktsiysi qo’yidagicha davom etadi: (1.2)
Biz (1.2) tenglamadagi karbonat angidridning (CO2) massasini m1 ga, uglerodning massasini (C) m2 ga va ularning molekulyar og'irliklarini M1 va M2 ga mos ravishda teng deb qabul qilamiz. Reaksiya beruvchi moddalar massalari va ularning molekulyar massalarining nisbatidan foydalanamiz: (1.3) bu erda m1 va m2 - reaktivlarning massalari; M1 va M2 ularning molekulyar og'irliklari; k1 va k2 ularning stexiometrik koeffitsientlari ((1.2) tenglama bo'yicha ular biriga teng). Kislorodning atom massasi 16 ga, uglerod – 12 gateng (D.I.Mendeleyev jadvalidan). Shunga ko'ra, CO2 (M1) ning molekulyar og'irligi 16×2+12=44; uglerodning molekulyar massasi uning atom massasiga teng olinadi, ya'ni. M2=2. (1.3) formuladan foydalanib quyidagilarga erishamiz: (1.4)
Ma'lumotlarni almashtirib, quyidagilarni olamiz: Ma'lumki, normal sharoitda 1 molga teyg har qanday gaz 22,4 litr hajmni egallaydi. 1 mol karbonat angidridning massasi 0,044 kg yoki 44 g (bir molning massasi son jihatdan molekulyar og'irlikka teng bo'lgani uchun) bo'lgani uchun, 2200 kg tarkibidagi karbonat angidrid mollari sonini 22,4 litrga ko'paytirsak, biz kerakli qiymatni olamiz. .
1.1) 2=1 * 103 .
1.2) 2=1 * 103
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1.4) 2=1 * 103 .
1.5) 2=1 * 103 .
1.2-topshiriq. Organik yoqilg'ining yonish mahsulotlarini aniqlash. Ma'lumki, o'tin yoki ko'mir yonishida karbonat angidrid (CO2) dan tashqari uglerod oksidi (CO2) ham hosil bo'lishi mumkin. Is gazi havodagi kislorod bilan oson oksidlanadi va ochiq havoda yoqilg‘i yonganda yoki havoga intensiv ravishda tortilishi orqali inson hayoti uchun havf solmaydi. Ammo yopiq xonada is gazi og‘ir zaxarlanishga,hattoki o‘lim holatigacha olib kelishi mumkin. Bu holatning kelib chiqishiga sabab, is gazining molekulaksining o‘lchami kislorod molekulasidan ozgina ortiqligidir. Nafas olishda nafasi yo‘llariga tushib qolganda, ular gemoglobin molekulasiga qaytib chiqmaydigan bo‘lib joylashib oladi, normal sharoitda kislorodni yetkazib beruvchi va oksidlangan (is gazi) moddalarni insonlarning har bir to‘qmasidan olib ketuvchi “tansport” vazifasini bajaradi. Natijada organizm kislorod yetqazib berish buziladi - “transporter”digi o‘rni bandligi uchun. Aytilganlardan ko‘rinib turibtiki, yonish va nafas olish jarayoni o‘rtasida to‘g‘ridan to‘g‘ri bog‘lanish mavjud. Chunki is gazining zichligi havo zichligida kamroq bo‘lganligi tufayli, shamollatishi yo‘q bo‘lgan xonalarda shiftda to‘planib qoladi. Is gazi va karbonad angidrid gazi rangsiz, hidsiz bo‘lganligi sababli, konsrentatsiya miqdorini havfli darajaga oshib borishi xonadagi insonlar uchun sezilmaydi. Bundan tashqari cho‘g‘langan ko‘mirda karbonad angidrid is gazi ko‘rinishda tiklanadi (CO2+C=2CO), bu qo‘shimcha havf tug‘diradi,chunki karbonad angidrid gazining ruxsat etilgan konsrentatsiyasi(REK) is gazinikiga nisbatan ancha kam. Topshiriqni bajarayotganda, namunada keltirilgan barcha taxminlar haqiqiy sharoitda sodir bo'lmasligini tushunish kerak. Xususan, karbonat angidrid va uglerod oksidi yopiq xonada bo'lishiga qaramay, ular zichligi teng bo'lmaganligi sababli bir-birining ustida joylashgan bo'lsa-da, aniq interfeys mavjud emas, ammo ma'lum aralashtirish qatlami mavjud.
(1.5)
yoki Yoqilg‘ini yonishi parallel holda ikkita jarayonda boradi: (1.6) (1.7)
(1.8)
(1.9)
yoki (1.7) da keltirilgan reaksiyada qatnashadigan uglerodning massasi quyidagiga teng: (1.10) yoki
(1.11) yoki
Osonlashtirish maqsadida is gazini hosil bo‘lish jarayonini (1.7) dagi reaksiya bo‘yicha olib borilmoqda deb hisoblaymiz. Kimyoviy reaktsiyaga jalb qilingan massalarning nisbati asosida (1.1-vazifani echish uchun tushuntirishlarga qarang), hosil bo’lgan uglerod oksidining massasini topamiz.
yoki .
(CO ni molekular og‘irligini uglerod va kislorod atom og‘irligi yig‘indisidek topamiz; (1.7) tenglamadagi CO va C dan oldingi koeffitsientlar bir-birini bekor qiladi). Normal sharoitlarda ushbu miqdordagi uglerod oksidi olinadigan hajm qo’yidagich hisoblanadi: yoki 4,480 m3. (CO ning bir mol massasi - 0,028 kg; normal sharoitda bir mol gaz egallagan hajmi - 22,4 litr, 1.1 vazifani echish uchun tushuntirishlarga qarang). Birlashtirilgan gaz qonunining tenglamasiga binoan biz T = 313K darajasida uglerod oksidining haqiqiy hajmini topamiz:
Xonaning maydoni Uglerod oksidi bilan to'ldirilgan zonaning balandligini aniqlaymiz: Ko‘rinib turibtiki xonada is gazi miqdori meyordan yuqori yoki Javob: uglerod oksidi bilan to'ldirilgan zona 2,375 metrdan yuqori.
2.1)
yoki yoki
yoki
yoki
yoki yoki 12.021 m3. Bu yerda Ko‘rinib turibtiki xonada is gazi miqdori meyordan yuqori yoki 1.3-topshiriq. Topshiriq Talabaning turar joyidagi ekologik holat 1.3.1. Turar joyning umumiy ta’rif-tafsifi Bu yerda uyingizni qaerda joylashganini (aholi turar joyi, chekka tuman, shahar, ularni geografik joylashuvi). _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Shu rayonni kartada qismini yoki mikroroyon planini qo‘shib ko‘rsating. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Tabiatni qo‘riqlovchi organlardan (shahar, tuman ekologik komitetlardan) yashab turgan rayoningiz, aholi yashasha punkitidagi atrof muhitning iflolanishini bilishga harakat qiling; - umumiy ifloslanish darajasini; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - saoat korxonalarini qanchaligi, yo‘l, aerodrom, chiqindilar poligoni, ahlatxonalar va boshqalar; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - radiatsiya darajasi va shovqin fondi; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - yer osti va yer usti suvlarining holati; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - o‘simlik va hayvonat dunyosining holati; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - aholining sog‘ligi va boshqa ma’lumotlar, ekologik holatlarga baho berishga yordam beruvchi holatlar. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 3.1.2. Siz yashab turgan mikrorayon xarakteristikasi Bunda ekologik xavfni keltiruvchi manbani aniqlash: - yaqin joylashgan sanoat korxonasi _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - ahlatxona _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - transprot magistrali _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - shovqin hosil qiluvchi manbalar _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - elektromagnit va radiatsiya ifloslanish _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Siz o‘z yashab turgan rayonigizagi shamol chambaragini (roza vetrov) bilasizmi, sanoat korxonasidan keladigan iflos havo uyingiznig qaysi qismi ta’siri ostida bo‘ladi. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Yaqin joylashgan bog‘ va xovuzlar joylashgan joylarni aniqlang. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Ularni hozirgi holati qanday? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 3.1.3. Hovli, tomorqa territoriyasining xarakteristikasi. Umumiy ma’lumotlar. Uyiningizning qurilgan vaqti, tomorqangizning o‘lchami. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Bu joylarda avval nima bo‘lgan? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Tuproq, o‘simlik va hayvonat dunyosi. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Qanday o‘simliklar uy atrofida va tomarqangizda uchraydi. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Uyingiz atrofini qanday tuproq qoplami bilan qoplangan (tabiiy, sun’iy yoki sochma tuproq; qurilish qoldiq chiqindilari)? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Ekinlarni o‘stirishda o‘g‘itlar yoki boshqa qo‘imcha ozuqalardan foydalanasizmi? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Tiboringizni tuproni qatqaloqlanishiga (bosib tashalagganligi) qarating, uygiz atrofida kuchuklarni aylantirishlariga ham etibor bering va boshqalar. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ 3.1.4. Mening oilamni atrof muhitga ta’siri Xech o‘ylab ko‘rganmisiz, oilangiz atorf muximtga qanday ta’sir ko‘rsatishini? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Suvdan foydalanish: - uyni suv bilan ta’minlanish manbai; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - sizning oilangiz qancha miqdorda suv sariflaydi (taxminan); _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - qanday maqsadlarda ishlatasiz (ma’ishiy-xo‘jalik, sug‘orishda va boshqalar); _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - yil fasllarda suvdni iste’mol qilishda farq bormi; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - chiqindi suvlarni tashash joyingiz; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - oilangiz suvga qancha pul to‘laydi; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Kanalizatsiyachi? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - oilangiz da buzilgan kran, trubalr bormi. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Buzilgan krandan qancha suv oqib ketmoqda: kran tagiga birorta idish qo‘yib va qancha vaqt mobaynida u to‘lishini aniqlang. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Elektr energiyadan foydalanish: - uyingizning elektrenergiya bilan ta’minlash manbai (TES, kotelniy) _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - sizning oilangiz bir oy mobaynida qancha elektr energiya ishlatadi va qancha pul to‘laydi _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - qanday ma’ishiy texnikadan, yoritish manbalarida (cho‘g‘lanma yoki lyuminessenli) foydalanasiz _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - elektrni ayab ishlatasizmi? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Sizning uyingizdagi gaz: - manbalar (tabiiy, siqilgan, ballonlarda olib kelinadigan) _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ - Sizning oilangiz har oyda qancha miqdorda gazdan foydalanadi va bunga qancha to‘lanadi _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Gaz plitasining asosiy harakteristikasi va sizning uyingizdagi havo sharoitiga ta’siri _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Gaz plitalarining asosiy texnika qoidalari bilan tanishmisiz, ular qanday? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Isitgich: Qanday turdagi uy tizimidan foydalanasiz? __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Qishda xonadoningizni yaxshi isitasizmi? __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Xonaning xaroratini o‘zingiz to‘g‘rilay olasizmi? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Oilangiz issiq suv va isitish tizimi uchun qancha pul to‘lashadi? (agar markazlashgan isitish tizimiga ulangan bo‘lsa) _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________v Chiqindilar – oilangizni «chiqindi chelagi»: sizning oilangiz kun davomida qancha miqdorda chiqindi tashlaydi. (0,5 yoki 1 chelak va x.k.). Yilning qaysi faslida ko‘proq. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Qaysi chiqindilar ko‘proq? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Bu chiqindilarni qaerga tashlashadi? ____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Oilangiz chiqindi tashlaganliklari uchun qancha xaq to‘lashadi? Agar ha bo‘lsa, qancha? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Uy ro‘zg‘or uchun chiqindilardan foydalanasizmi? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Kimyoviy moddalar. Sizning oilangiz turli hil maqsadlar uchun qanday kimyoviy moddalardan foydalanashadi; _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Ular qaerda saqlanadi? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Amal qilish muddati o‘tgan dori, kimyoviy moddalarni nima qilasiz? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ kimyoviy moddalardan foydalanish konun qoidalarini bilasizmi? Qanday turdagilari havfliroq? _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Download 133.56 Kb. Do'stlaringiz bilan baham: |
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