Ammonia, NH3, is a leading industrial chemical used in the production of agricultural fertilizers and synthetic fibers. It is produced by the reaction of nitrogen and hydrogen gases:
3 H2 + N2 → 2 NH3
How many moles of N2 are needed to produce 42.4 moles NH3?
3 H2 + N2 → 2 NH3
How many moles of N2 are needed to produce 42.4 moles NH3?
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Moles of N₂ : = 21.2 moles
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Given
42.4 moles of NH₃
Required
moles of N₂
Solution
Reaction
N₂ (g) + 3 H₂ (g) ⇒ 2 NH₃ (g)
From the equation, mol ratio of N₂ : NH₃ = 1 : 2, so moles of N₂ :
= 1/2 x moles NH₃
= 1/2 x 42.4
= 21.2 moles