a.M+H2SO4->MSO4+H2
nH2=4,48/22,4=0,2(mol)
=>nM=0,2(mol)=>MM=\(\dfrac{4,8}{0,2}=24\)
Vậy kim loại M là Mg
b.nH2SO4=0,2(mol)=>Vdd H2SO4=\(\dfrac{0,2}{0,5}=0,4\left(l\right)\)
c.nMgSO4=0,2(mol)=>CMdd MgSO4=\(\dfrac{0,2}{0,4}=0,5\left(M\right)\)
M+H2SO4\(\rightarrow\)MSO4+H2
\(n_M=n_{H_2SO_4}=n_{MSO_4}=n_{H_2}=\dfrac{4,48}{22,4}=0,2mol\)
M=\(\dfrac{m}{n}=\dfrac{4,8}{0,2}=24\left(Mg\right)\)
\(v_{H_2SO_4}=\dfrac{n}{C_M}=\dfrac{0,2}{0,5}=0,4l\)
\(C_{M_{MgSO_4}}=\dfrac{n}{v}=\dfrac{0,2}{0,4}=0,5M\)