8 класс
Authored by Юлия Дервис
Chemistry
8th Grade
Used 1+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какая валентность у кислорода?
III
I
II
IV
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Молярная масса воды равна...
18
18 г/моль
17 г/моль
17 моль
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Относительная атомная масса железы равна...
56 г/моль
56
56 моль
56 г
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Масса оксида калия равна 30 г. Рассчитайте химическое количество.
0,55 моль
0,55
0,05 моль
39
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Химическое количество O2 2 моль. Рассчитайте объем
22,4 дм3
2 дм3
44,8 дм3
43 дм3
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