82.35 % nitrogen
Explanation:
The molecular formula of ammonia is NH₃.
molecular weight of NH₃ = atomic weight of N × 1 + atomic weight of H × 3
molecular weight of NH₃ = 14 × 1 + 1 × 3 = 17 g/moles
Considering 1 mole of ammonia, we devise the following reasoning:
if in 17 g of ammonia there are 14 g of nitrogen
then in 100 g of ammonia there are X g of nitrogen
X = (100 × 14) / 17 = 82.35 % nitrogen
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percentage composition of a element
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