Kimyoning asosiy tushunchalariga oid testlar

219. Vodorod, azot va kislorodning moddadagi massa ulushlari tegishlicha 5; 35 va 60% ga teng. Shu moddaning eng oddiy formulasini aniqlang.
A) B) C) D)
220. Quyidagi birikmalarning qaysi birida uglerodning massa ulushi 20% ga teng?
A) ohaktosh B) mochevina B) kalsiy asetat D) is gazi
221. Kumushning massa ulushi 87% bo’lsa, alyuminiy bilan kumush birikmasining formulasini aniqlang.
A) B) C) D)
222. Natriy gidrofosfat da 11,57% fosfor bor. Kristalgidrat tarkibidagi n ning qiymati nechaga teng.
A) 7 B) 5 C) 10 D) 12
223. Glauber tuzi tarkibida natriyning massa ulushi 16,08% ga teng. Bu tuz tarkibida necha mol suv bor?
A) 6 B) 8 C) 10 D) 12
224. Magniy kuporosi tarkibida magniyning massa ulushi 11,42% ga teng. n ning qiymatini toping.
A) 4 B) 5 C) 6 D) 7
225. tarkibida uglerodning massa ulushi 4,8% ga teng bo’lsa, n ning qiymati qancha bo’ladi?
A) 7 B) 8 C) 10 D) 12
226. Temir (III)-sulfat tarkibida oltingugurt bilan temirning massa ulushi 37,0% ga teng bo’lsa, n ning qiymati qancha bo’ladi?
A) 8 B) 10 C) 12 D) 9
227. Alyuminiy sulfat kristalgidrati tarkibida alyuminiyning massa ulushi 9,67% ga teng bo’lsa, n ning qiymati qancha bo’ladi?
A) 12 B) 10 C) 16 D) 18
228. Alyuminiy sulfat kristalgidrati tarkibida alyuminiyning massa ulushi 8,1 % ga teng bo’lsa, kristalgidrat tarkibida suvning mollar sonini aniqlang.
A) 9 B) 12 C) 16 D) 18
229. Marganets (II)-sulfat tarkibida 24,66% marganets bo’lsa, uning formulasi qanday?
A) B) C) D)
230. Temir kuporosi tarkibidagi oltingugurtning massa ulushi 11,50% ni tashkil etsa, kristalgidratdagi n ni qiymatini toping.
A) 7 B) 10 C) 12 D) 6