Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N₂ (g) + 3H₂ (g) → 2NH₃ (g)
A 7.1-g sample of N₂ requires ________ g of H₂ for complete reaction.

Question

Quizplus · Accepted Answer

The molar mass of N₂ is 28.02 g/mol, so 7.1 g of N₂ is 0.253 mol. According to the balanced equation, 3 moles of H₂ are required for every mole of N₂, so 0.253 mol of N₂ requires 0.759 mol of H₂. The molar mass of H₂ is 2.02 g/mol, so 0.759 mol of H₂ is 1.53 g, which rounds to 1.5 g.

Under Appropriate Conditions, Nitrogen and Hydrogen Undergo a Combination Reaction