Form sentences using the passive. 1 I think there's somebody behind us. (we/follow) > We are being followed. 2 He's very angry, (hate/keep waiting) 3 It's private parking, (parking/not allow)

Mg+2HCl=H2+MgCl2
m(HCl)=200г*0,073=14,6г
n(HCl)=14,6г/36,5г/моль=0,4моль
Решаем задачу по недостатку,т.е. по HCl
n(H2)=0,4моль/2=0,2моль
V(H2)=22,4л/моль*0,2моль=4,48л
ответ:4,48л

Извини за качество. что не увидишь,спроси