no reaction
because Cu is below Zn at electrochemical series ,so Cu can't take Zn away from its salts
3Cu + 8HNO3 +O2 = 3Cu(NO3)2 + 4H2O + 2NO2
NH3 + O2 + H20 = HNO3 + 2H2 Basically, on the left you have 1 N, 3 O and 5 H atoms. On the right, you have 1 H, 1 N and 3 O atoms - leaving 4 H atoms doing nothing. Since a molecule of Hydrogen has 2 atoms, you need 2 atoms to balance the equation.
This is an oxidation reaction of N from -3 (in NH3) to +2 (in NO) oxidation value. 4 NH3 + 5 O2 --> 6 H2O + 4 NO
n+o2=no2
2SO2 + O2 + 2H2O -------> 2H2SO4
6 CO2 + 12 H2O --> C6h12O6 + 9 O2
1 nh3+ 2o2 >>>>> 1hno3 + 1h2o
NH3 + O2 + H20 = HNO3 + 2H2 Basically, on the left you have 1 N, 3 O and 5 H atoms. On the right, you have 1 H, 1 N and 3 O atoms - leaving 4 H atoms doing nothing. Since a molecule of Hydrogen has 2 atoms, you need 2 atoms to balance the equation.
This is an oxidation reaction of N from -3 (in NH3) to +2 (in NO) oxidation value. 4 NH3 + 5 O2 --> 6 H2O + 4 NO
I think that should be 2N2O4+2H2O+O2 --> 4HNO3 But i'm not sure
2NaH2 + O2 yields 2Na + 2H2O
4Li + O2 -> 2Li2O
n+o2=no2
Endothermic
2SO2 + O2 + 2H2O -------> 2H2SO4
Mg equals Mg2+ plus 2e-
6 CO2 + 12 H2O --> C6h12O6 + 9 O2
2C3H4O7 + O2 -> 6CO2 + 4H2O