
химия 150-200
Quiz
•
Others
•
1st Grade
•
Practice Problem
•
Hard
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Чему равна молярная масса (г)г/моль)
нитрата кальция Са(NО3)2?
164
204
82
102
124
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Лед растворяется в очень разбавленной
азотной кислоте. До чего восстанавливается
азотная кислота?
до NН3
До NO
До N2O
До NO2
До N2O3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какие оксиды входят в состав обычного
стекла: Nа2О, Al2O3, FeO, SiO2, BaO, SiO, K2O,
CaO, B2O3?
Na2O, CaO, SiO2
Na2O, FeO, K2O
SiO, BaO, Na2O
Na2O, CaO, BaO
SiO2, B2O3, Al2O3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой, из нижеперечисленных газов,
является наиболее тяжелым: О2, Хе, NН3, WF6,
N2?
WF6
O2
NH3
Xe
N2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какое из указанных ниже веществ: HgCl2,
MgSO4•7H2O, Na2SO4•10H2O, NaHCO3,
CuSO5•5H2O является ядом по отношению к
человеческому организму?
HgCl2
CuSO4•5H2O
MgSO4•7H2O
Na2SO4•10H2O
NaHCO3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
При выпаривании 20 г раствора было
получено 4 г соли. Какой концентрации был
раствор?
20%
16%
12%
8%
24%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Вычислить содержание (%) воды в
кристаллогидрате Na2SO4•10H2O.
55,9%
45,9%
35,9%
25,9%
65,9%
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