\(a.n_{H_2SO_4}=\dfrac{196.10\%}{98}=0,2\left(mol\right)\\ ZnO+H_2SO_4\rightarrow ZnSO_4+H_2O\\ 0,2.......0,2........0,2.......0,2\left(mol\right)\\ m_{ZnSO_4}=161.0,2=32,2\left(g\right)\\ b.m_{ddsau}=196+0,2.81=212,2\left(g\right)\\ c.C\%_{ddZnSO_4}=\dfrac{32,2}{212,2}.100\approx15,174\%\)