3h2 + n2 —> 2nh3 .
how many molecules (not moles) of nh3 are produced from 6.33x10^-4 g of h2?

Explanation:

We will need a balanced chemical equation with masses, moles, and molar masses.

1. Gather all the information in one place:

M_r:      2.016                 17.03

              3H₂   +   N₂ ⟶ 2NH₃

m/g:  6.33 × 10⁻⁴  

2. Calculate the moles of H₂

3. Calculate the moles of NH₃

The molar ratio is 2 mol NH₃/3 mol H₂.

4. Calculate the molecules of NH₃

There are 6.022 × 10²³ molecules of NH₃/1 mol NH₃.

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