Формулы и уравнения
Quiz
•
Chemistry
•
7th Grade
•
Medium
Marina Komarova
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
выберите формулу оксида железа (III)
Fe3O
FeO3
O3Fe2
Fe2O3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
выберите формулу оксида марганца (VII)
3.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
запишите формулу оксида кальция
4.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
запишите формулу оксида углерода (IV)
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
выберите правильно составленное уравнение реакции
K+O2-->KO
4K+O2-->2K2O
K+O2-->2KO
2K+O2-->KO2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
выберите неправильно составленное уравнение
2H2+O2-->2H2O
C+O2-->CO2
2K+O2-->KO2
2C+O2-->2CO
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
чему равна сумма коэффициентов уравнения
Mn+O2-->Mn2O7
13
12
11
10
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