Pt:\(Cu+H_2SO_4\xrightarrow[]{X}\)
\(Mg+H_2SO_4\rightarrow MgSO_4+H_2\)(1)
a) nH2 = \(\dfrac{3,36}{22,4}=0,15mol\)
Theo pt (1) nMg = nH2 = 0,15 mol
=> mMg = 0,15.24 = 3,6g
=> m Cu = 5,2 - 3,6 = 1,6g
b) Theo pt (1) nMgSO4 = nH2 = 0,15 mol
=> mMgSO4 = 0,15.120 = 18g