a. PTHH: MgO + 2HCl ---> MgCl2 + H2O
b. Ta có: \(n_{MgO}=\dfrac{8}{40}=0,2\left(mol\right)\)
Theo PT: \(n_{MgCl_2}=n_{CuO}=0,2\left(mol\right)\)
=> \(m_{MgCl_2}=0,2.95=19\left(g\right)\)
c. Theo PT: \(n_{HCl}=2.n_{MgO}=2.0,2=0,4\left(mol\right)\)
Ta có: \(C_{M_{HCl}}=\dfrac{0,4}{V_{dd_{HCl}}}=2M\)
=> \(V_{dd_{HCl}}=0,2\left(lít\right)\)