Предмет: Химия, автор: petrpetr064

Какой объем оксида углерода (IV) (н. у.) получится при разложении известняка массой 500 г, содержащего 20% примесей?

Ответы

Автор ответа: pingpong123
30

Ответ:89,6 л

CaCO3=CO2+H2O

найдем массу примесей

mприм=0,2*500 г=100г

найдем массу чистого известняка

m ч.в.=500 г -100 г = 400 г

найдем количество CaCO3

n(CaCO3)=400 г/100г/моль=4 моль

n(CO2)=n(CaCO3)=4 моль

V(CO2)=n(CO2)*Vm

V(CO2)=4 моль* 22,4 л/моль=89,6 л

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