Nitrogen and hydrogen can react to form ammonia:
N2(g) + 3 H2(g)→2 NH3(g)
(a) Write ratios showing the relationships between moles of each of the reactants and products in the reaction.
(b) How many molecules of H2 are required to completely react with two molecules of N2?
(c) How many moles of H2 are required to completely react with 2 mol of N2?
(a)One mole of N2 reacts with 3 moles of H2 to give 2 moles of ammonia.The ratio of number of moles of N2:H2:NH3 is 1:3:2
1 mole of H2 contains 6.023 1023 molecules of H2
In the problem 3 mole of H2 reacts with 1 mole of N2 .
Or 3 6.023 1023molecules of H2 reacts with 6.023 1023 molecules of N2
Thus 1 molecule of N2 reacts with =3 molecules of H2
Or 2 molecule of N2 reacts with 23 molecules of H2=6 molecules of H2