Ответ учителя по предмету Химия
Дано:
m(Mg) = 3.6 r
Найти:
V(H2)=?
n(MgCl2)=?
Решение.
M(Mg) = 24 г/моль
n(Mg) = m(Mg)/M(Mg)
n(Mg)= 3,6 г/24 г/моль = 0,15 моль
Vm = 22,4 л/моль
Mg + 2HCl = MgCl2 + H2
Из УХР следует, что n(MgCl2)=n(H2)=n(Mg)
n(MgCl2) = 0,15 моль
n(H2) = 0,15 моль
V(H2)=n(H2)*Vm
V(H2) = 0,15 моль*22,4 л/моль = 3,36 л
Ответ: 3,36 л Н2 и 0,15 моль MgCl2
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