Zn+H2SO4=ZnSO4+H2
65 98 161 2
6.5g x y z
65/2=6.5g/zz=0.2g65/98=6.5g/xx=9.8g1,氢气质量=0.2g2,硫酸的溶质质量分数=9.8g/200g*100%=4.9%