химия
Chemistry
KG
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
тип химической реакции разложения это
АВС=АВ+С
АВ+С+АВС
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
реакция соединения это
А+В=С
АВ=А+В
А+В=К
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
степень окисления у кислорода
2
-2
+2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
степень окисления у натрия в соединении Na2O
+1
-1
0
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
степень окисления у S2
0
1
2
3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
продолжите CaCo3=
CO2+CaO
Ca+O2
CaO+O2
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