nH2 = 2.24/22.4 = 0.1 (mol)
Zn + 2HCl => ZnCl2 + H2
0.1________________0.1
mZn = 0.1 * 65 = 6.5 (g)
Zn +2HCL -> ZnCl2 +H2
nH2= 2,24/22,4=0,1 mol
nZn=nH2
mZn= 65x0,1=6,5g
PT: Zn + 2HCl ---> ZnCl2 + H2.
Ta có: nH2=2,24/22,4=0,1(mol)
Theo PT, ta có: nZn=nH2=0,1(mol)
=> mZn=0,1 . 65=6,5(g)