Question

1) HNO3+Cu→Cu(NO3)2+NO+H2O;

2) KMnO4+HCl→KCl+MnCl2+Cl2+H2O;

3) NH3+PbO2→N2+Pb+H2O.

Answer 1

1)3Cu + 8HNO3(р)= 3Cu(NO3)2 +2NO +4H2O

2) 2KMnO4 + 16HCl = 2KCl + 2 MnCl2 +5 Cl2 + 8H2O

3) 4NH3 + 3PbO2 = 2N2+ 3Pb + 6H2O