N(HCl) = 0.75 mol
1) N(NaOH) - ?
x mol 0,75 mol
NaOH + HCl = NaCl + H2O
1 mol 1 mol
1:x = 1:0.75
x = 0.75
N(NaOH) = 0.75 mol
2) N(Mg(OH)2) - ?
x mol 0.75 mol
Mg(OH)2 + 2HCl = MgCl2 + 2H2O
1 mol 2 mol
1:x = 2:0.75
2x = 0.75
x = 0.375
N(Mg(OH)2) = 0.375 mol
3)N(Al(OH)3) - ?
x mol 0.75 mol
Al(OH)3 + 3HCl = AlCl3 + 3H2O
1 mol 3 mol
1:x = 3:0.75
3x = 0.75
x=0.25
N(Al(OH)3) = 0.25 mol
2. N(Mg) = 1.5 mol
m(MgO) - ?
1.5 mol x mol
2Mg + O2 = 2MgO
2 mol 2 mol
2:1.5 = 2:x
2x = 3
x = 1.5
m(MgO) = 1.5*40 = 60 g
3. не видно продолжения