
Химические расчеты
Authored by Julia Vishnevskaya
Chemistry
10th Grade
Used 2+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Чему равно число молекул в 1 моль азотной кислоты?
6,02*1023
6,02*10-23
30,1*1023
30,1*10-23
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Сколько моль CO2 содержится в 11 г? (MC = 12 г/моль, MO = 16 г/моль)
2
1/2
1/4
22/28
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
25x + 44 = 50 + x, Найдите x
4
0,25
12
0,4
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Чему равна масса воды в 200 г 6%-ного уксуса?
18
91
9
188
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2H2 + O2 = 2H2O. Сколько грамм воды получится при полном окислении 4 г водорода?
18
72
36
9
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Смешали 100 г 5%-ного раствора соли и 120 г 10%-ного. Чему равна массова доля соли в конечном растворе?
17
8,1
7,7
6,2
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
y = 4x, 145y - 85x = 99 . Чему равен y?
0,4
0,2
0,8
0,1
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