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16 June, 09:26

What mass of ammonia is formed when 3.75 grams of nitrogen gas react with hydrogen gas according to the balanced chemical equation: N2 (g) + 3H2 (g) - -> 2NH3 (g) ?

3.75 g

4.55 g

7.50 g

9.10 g

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Answers (1)
  1. 16 June, 09:41
    0
    Mass = 4.55 g

    Explanation:

    Given data;

    Mass of nitrogen = 3.75 g

    Mass of ammonia produced = ?

    Solution:

    Chemical equation:

    N₂ + 3H₂ → 2NH₃

    Number of moles of nitrogen:

    Number of moles = mass / molar mass

    Number of moles = 3.75 g / 28 g/mol

    Number of moles = 0.134 mol

    Now we compare the moles ammonia with nitrogen

    N₂ : NH₃

    1 : 2

    0.134 : 2/1 * 0.134 = 0.268 mol

    Theoretical yield:

    Mass = number of moles * molar mass

    Mass = 0.268 mol * 17 g/mol

    Mass = 4.55 g
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