Can someone please answer this question

Question

Given the following equation:

2 N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)

How many grams of H₂ are required if 16 grams of NH₃ is produced? 

 ________g H₂

Answer 1

The equation that you have is NOT balanced, so can't be used to answer the question.

The correctly balanced equation is...

N₂(g) + 3H₂(g) ==> 2NH3(g)

molar mass NH₃ = 17 g/mol

molar mass H₂ = 2 g / mol

16 g NH₃ x 1 mol NH₃ / 17 g x 3 mols H₂ / 2 mols NH₃ x 2 g H₂ / mol = 2.8 g H₂ required