Kimyo fanidan

Sana______
3-nazorat ishi.
Mavzu:Fizik va kimyoviy o’zgarishlar.Kimyoviy reaksiya tenglamalari. Koeffitsiyent. Tarkibning doimiylik qonuni. Massaning saqlanish qonuni. Avagadro qonuni. Molar hajm. Kimyoviy reaksiya turlari.
Nazorat shakli: masala yechish.
I-variant
1.Tarkibida 50%S va 50%O bo’lgan moddaning formulasini toping.
2.32gr SO₂ ning modda miqdorini toping.
3.Quyidagi reaksiyani tugallang va koeffisiyentlar qo’ying.
H₂+O₂= Cu+Cl₂=
Kompetentlikni aniqlash uchun materiallar:
4.Fizik o’zgarishlarni hayotiy misollar orqali tushuntiring.
5.Tarkibning doimiylik qonunini hayotda kuzatgan misollar orqali izohlab bering.
II-variant
1.Tarkibida 27,27%C va 72,73%O bo’lgan moddaning formulasini toping.
2.19,6gr sulfat kislota H₂SO₄ning modda miqdorini toping.
3. Quyidagi reaksiyani tugallang va koeffisiyentlar qo’ying.
Al+O₂₌ Ca+Cl₂=
Kompetentlikni aniqlash uchun materiallar:
4.Kimyoviy o’zgarishlarni hayotiy misollar orqali tushuntiring.
5.Massaning saqlanish qonunini suvni olish reaksiyasi misolida tushuntirib bering.
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Baho ______