In the reaction of nickel with concentrated nitric acid, the products are nickel (III), water and?

Question

dinitrogen monoxide, sometimes called nitrous oxide. If 150ml of nitrous oxide were collected over mercury at 42degree C and under a pressure of 75.5 cm of mercury, how many grams of nickel had reacted?

Answer 1

Ni -> Ni2+ + 2e-

2 NO3- + 8e- + 10H+ -> N2O + 5H2O

4 Ni + 10 HNO3 -> 4 Ni(NO3)2 + 5H2O + N2O

Now find out by stoichiometry.