2Cu+O2-to>2CuO
0,1----0,05
4Al+3O2-to>2Al2O3
0,4---0,3 mol
n Cu=\(\dfrac{6,4}{64}\)=0,1 mol
n Al=\(\dfrac{10,8}{27}\)=0,4 mol
=>VO2=0,35.22,4=7,84l
2Cu+O2-to>2CuO
0,1----0,05
4Al+3O2-to>2Al2O3
0,4---0,3 mol
n Cu=10,8/27=0,4 mol
=>VO2=0,35.22,4=7,84l
Đốt 9,4 (g) h2 Mg; Na đủ với 3,36(l) O2 đktc. Xđ % m Mg