
0 срез 9 класс
Authored by Саулеш Даденбекова
Chemistry
2nd - 3rd Grade
Used 8+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В атоме кислорода количество электронов равно?
16
8
2
6
Answer explanation
Количество электронов в атоме равен порядковому номеру
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2.Валентность алюминия в оксиде алюминия?
3
4
5
2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.Сумма коэффициентов в уравнении реакции получения воды из водорода и кислорода равна
4
3
5
6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4.Если в реакции из 2 простых или сложных веществ получается одно сложное вещество, то она называется реакция...
А)разложения
Б)соединения
В)обмена
Г)замещения
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5.Какую массу имеет N2 количеством вещества 0,5 моль?
А)14
Б)28
В)7
Г)21
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6.Определите количество вещества Н2, в котором содержится 18,06 · 1023 молекул.
А)1 моль
Б)2 моль
В)3 моль
Г)4 моль
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7.Определите число молекул кислорода, содержащихся в 2 моль О2.
А)6,02 · 1023 молекул
Б)12,04 · 1023 молекул
В)60,2 · 1023 молекул
Г)9,03 · 1023 молекул
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