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19 May, 23:22

Nitrogen gas and hydrogen gas are combined in a reaction to produce ammonia. If 3.0 moles of N2 and 12.0 moles of H2 are present in the mixture, which is the limiting reactant?

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  1. 20 May, 01:58
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    The limiting reactant is the N₂

    Explanation:

    The reaction for production of ammonia is:

    N₂ + 3H₂ → 2NH₃

    Ratio is 1:3. Let's make a rule of three to solve this:

    1 mol of nitrogen is needed to react with 3 moles of hydrogen.

    3 moles of nitrogen may react with (3. 3) / 1 = 9 moles of H₂

    It is ok because I have 12 moles, so the limiting reactant is the N₂ but let's confirm it.

    3 moles of H₂ react with 1 mol of N₂

    12 moles of H₂ would react with (12. 1) / 3 = 4 moles of N₂

    It's ok to say the N₂ is the limiting because I don't have enough moles to react. I need 4 and I only have 3
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