# Chem 11 - Chemical Reactions (Yields)?

Given the balanced equation:

N2 + 3H2 ---> 2NH3

When 190.4 grams of N2 are added to an excess of H2, a reaction occurs in which 104.04 grams of NH3 are formed.

Calculate the theoretical yield of NH3 in grams.

Calculatre the percentage yield of NH3.

### 1 Answer

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- pisgahchemistLv 76 months agoFavorite Answer
Theoretical and percent yield ....

N2(g) + 3H2(g) --> 2NH3(g)

190.4g ...................(104.04g)

190.4 g N2 x (1 mol N2 / 28.013g N2) x (2 mol NH3 / 1 mol N2) x (17.031g NH3 / 1 mol NH3) = 231.51g NH3

Percent yield = 104.04g / 231.51g x 100 = 44.94%............ the answer can be expressed to only four significant digits.

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