a, \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b, \(n_{HCl}=0,2.1=0,2\left(mol\right)\)
Theo PT: \(n_{Zn}=\dfrac{1}{2}n_{HCl}=0,1\left(mol\right)\Rightarrow m_{Zn}=0,1.65=6,5\left(g\right)\)
c, \(n_{H_2}=\dfrac{1}{2}n_{HCl}=0,1\left(mol\right)\Rightarrow V_{H_2}=0,1.22,4=2,24\left(l\right)\)