Răspuns:
c=mdx100/ms
md= cxms/100=20x400/100g=80gH2SO4
1mol.........1mol.........................1mol
Zn + H2SO4----> ZnSO4 + H2
65g..........98g..............................1mol
x................80g...................................y
x=m=53gZn
y=niu=0,816molH2
V= niuxVm= 0,816molx22,4 l/mol=18,286 l H2
Explicație: