How many molecules (not moles) of NH3 are produced from 5.01*10-4 g of H2?

Find the number of molecules NH3 produce from the given equation:

7.42 x 10 - 4g H2

Now, let’s start solving this equation:

=> H2 reacts to ammonia and produced 3 to 2

=> Avogrado’s number = 6.02 x10^23

=> 7.42 x 10^/4 H2 times

=> 2.02g H2/1 mol H2 times

=> 3 mols H2/2 mols NH3 times

=> 6.02 x 10^23 molecules NH3/1 mol NH3

=> Thus the answer is 1.35 x 10^23 molecules NH3