`Zn+H_2SO_4->ZnSO_4+H_2`
`n_{Zn}=(2,6)/65=0,04mol`
`n_{H_2}=n_{Zn}=0,04mol`
`V_{H_2}=0,04.22,4=0,896l`
`n_{H_2SO_4}=n_{Zn}=0,04mol`
`%m_{H_2SO_4}=(0,04.98)/(50%)=7,84%`
`n_{ZnSO_4}=n_{Zn}=0,04mol`
`mdd_{spu}=2,6+50-0,04.2=52,52g`
`%m_{ZnSO_4}=(0,04.(65+32+16.4))/(52,52%)=12,26%`