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Problem: Ammonia can also be synthesized by the reaction:3H2(g) + N2(g) → 2NH3(g)What is the theoretical yield of ammonia, in kilograms, that we can synthesize from 5.39 kg of H2 and 33.5 kg of N2?

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We are asked to calculate the theoretical yield of ammonia, in kilograms, that we can synthesize from 5.39 kg of H2 and 33.5 kg of N2


3 H2(g) + N2(g) → 2 NH3(g)


Calculate the yield based on both reactants: 

Molar mass H2 = 2.02 g/mol

Molar mass N2 = 28.02 g/mol


For H2:

5.39 kg H2 × 103  g 1  kg ×1 mol H2 2.02 kg H2 ×2  mol NH3 3  mol H2 ×17.04  g NH3 1 mol NH3 ×1 kg103 g 

= 30.31 kg NH3


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Problem Details

Ammonia can also be synthesized by the reaction:

3H2(g) + N2(g) → 2NH3(g)

What is the theoretical yield of ammonia, in kilograms, that we can synthesize from 5.39 kg of H2 and 33.5 kg of N2?


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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Limiting Reagent concept. If you need more Limiting Reagent practice, you can also practice Limiting Reagent practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ernst's class at UTAH.