
Простейшие задачи (РТ)
Authored by Снежана Левко
Chemistry
11th Grade

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1.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
1. В молекуле лимонной кислоты содержится 6 атомов углерода, а его массовая доля в ней составляет 37,5 %. Найдите относительную молекулярную массу лимонной кислоты.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. Масса хлороводорода составляет 28,4 г. Объем (дм3) данной порции газа (дм3) при н. у. равен:
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Плотность некоторого газообразного (н. у.) вещества Х составляет 1,964 г/дм3. Его относительная плотность по кислороду равна:
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4. Масса (г) атомов хлора в порции карналлита, формула которого KCl · MgCl2 · 6H2O, количеством 0,6 моль равна:
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. Объем (дм3, н. у.) аммиака, в котором содержится водород массой 2,7 г, равен:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6. Количество (моль) всех атомов в порции сернистой кислоты массой 196,8 г равно:
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. Число атомов кислорода в образце кристаллогидрата Nа2SO4 · 10H2O массой 48,3 г равно:
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