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University
•75 Qs
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Период
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Chemistry
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University
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Practice Problem
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Medium
Flow Flower
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75 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
100 г 63% азот қышқылын бейтараптау үшін қажет кальций
гидрооксидінің массасы
64
32
74
126
37
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Қай элемент тұрақты ІІ валентті көрсетеді
Сu
Sn
Fe
Na
Ag
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Қай реакция арқылы кальций карбидің алады
СаО + С →
СаО + Н2О →
Са(ОН)2 + СО2 →
Са(НСО3)2 →
СаСО3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
39 г. кальций фторидінің балқу массасын электролиздегенде
шыєымы 80% болатын фтордың массасы неге тең
15,2г
21,4г
25,6г
16,08
19.02
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
126 г азот қышқылы аммиакпен јрекеттескенде түзілген аммиак
силитрасының массасы қандай, егер шыєымы 80% болса?
128
120
138
140
105
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Период жүйесіндегі ІІ период ІІ топтың негізгі топшасындаєы
элемент көрсетіңіз
Be
Ca
B
Mg
C
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ең күшті тотықтырєыш көрсететін галоген
Фтор
Бром
Хлор
Йод
Астат
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