Question

Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation

3H2(g)+N2(g)→2NH3(g)

1. How many molecules (not moles) of NH3 are produced from 5.25×10⁻⁴ g of H2 ?

Answer 1

Given :

Reaction:

3 H2 + N2 (g) --- > 2 NH3 (g )

Molecules of NH3 are produced are calculated by using moles of NH3.

Moles of NH3 are calculated by using moles of H2.

Moles of H2 are calculated by using ( mol = mass in g / molar mass )

Lets combine these together and get the molecules are formed.

Molecules of NH3 formed

= (5.25 E-4 g H2 / 2.01588 g mol^-1 ) x (2molNH3/3 mol H2)x(6.02 E23NH3 molecules /1 mol NH3 )

= 1.045 E 20 NH3 molecules

Answer : Number of NH3 molecules formed =1.045 E20