Zn + 2HCl = ZnCl2 + H2↑
65 73 2
m(Zn) 50g*14.6% m(H2)
得:m(Zn) / 65 = 50g*14.6% / 73 = m(H2) / 2
从而算得锌的质量为0.65g,氢气质量为0.2g