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8-sinf Kimyo olimpiada №3

Yanvar 3, 2023

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8-sinf Kimyo olimpiada №3

30.12.2022 yil oo.uzedu.uz

Online olimpiada savollari!

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20.4 g H₂S mo’l miqdorda kislorodda yondirildi. Olingan gaz o’yuvchi natriy bilan reaksiyasida nordon tuz massasi o’rta tuz massasidan 16.4 g ga ko’p bo’lsa, nordon tuz massasini (g) da aniqlang.

10,4

20

31,2

41,6

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Laboratoriyada xlor gazi qanday moddalardan olinadi?

KClO, HCl,KCl

KMnO₄, HCl, MnO₂

NaCl, H₂O

HCl, NaCl, KOH

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C

D

B

A

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B

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B

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