Question

Расставьте коэффициенты: Fe2O3 + H2 = H2O + Fe PbO + Al = Al2O3 + Pb Cr2O3 + Mg = MgO + Cr Al + H2O = Al(OH)3 + H2

Answer 1

Fe2O3 +2 H2 = 3H2O + 2Fe

3PbO + 2Al = Al2O3 + 3Pb

Cr2O3 +3 Mg = 3MgO + 2Cr

2Al + 6H2O = 2Al(OH)3 +3 H2