8-sinf Kimyo olimpiada №2

Dekabr 16, 2022Dekabr 16, 2022 InfoMaster fikr bildirilmagan.

3

8-sinf Kimyo olimpiada №2

08.12.2022 yil oo.uzedu.uz

Online olimpiada savollari!

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CH_4(g) + H₂O_(g) = CO_(g) + H_2(g)reaksiyada CH₄ ning 50%-i sarflanganda muvozanat qaror topdi. Reaksiya uchun olingan CH₄ va H₂O larning konsentratsiyalari mos ravishda 1,7 va 2,3 mol/l bo`lsa, CO va H₂ larning muvozanat konsentratsiyalari (mol/l) yig`indisini aniqlang.

2,6

3,4

1,2

0,4

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Suyak tarkibida 31% kalsiy fosfat va 5% kalsiy karbonat borligi aniq bo’lsa suyak tarkibidagi kalsiyning massa ulushini (%) aniqlang.

10,67

21,33

8

14

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Sulfat kislotaning zichligi nechaga teng?

2 g/sm³

1,84 g/sm³

1 g/sm³

2 g/sm³

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Tarkibida 15.65210²³ ta vodorod atomi bo’lgan 11,2 metan va butan aralashmasini yoqish uchun ozon –kislorod (φO₂=0.76) aralashmasidan necha litr kerak?

32,48

56

62,72

29

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Inson bir kunda 10 gr tuz iste’mol qiladi. 1 yilda qancha tuz iste’mol qiladi?

3,6 kg

300kg

36 kg

3 kg B.

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