Question

相对原子质量：Zn-65 H-1 O-16 S-32

Answer 1

1:锌和稀硫酸Zn + H2SO4 = ZnSO4 + H2↑

65 2

6.5 g x g

6.5/65=x/2

x=0.2 g

2:电解水2H2O=2H2+O2

x g 6 g

36 4

x/36=6/4

x=54 g