a)\(MgO+H2SO4-->MgSO4+H2O\)
b)\(n_{MgO}=\frac{8}{40}=0,2\left(mol\right)\)
\(n_{H2SO4}=n_{MgO}=0,2\left(mol\right)\)
V\(_{H2SO4}=\frac{0,2}{1}=0,2\left(l\right)\)
c)\(n_{MgSO4}=n_{MgO}=0,2\left(mol\right)\)
\(mMgSO4=0,2.120=24\left(g\right)\)
\(C_{M\left(MgSO4\right)}=\frac{0,2}{0,2}=1\left(m\right)\)