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13 January, 19:52

Determine both the formula mass and molar mass of ammonium carbonate, (nh4) 2co3

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  1. 13 January, 20:33
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    96.08462 grams

    96.08462 grams/mole

    The formula mass of a substance is simply the sum of the atomic weights of the atoms in the substance. So let's start by looking up the atomic weights.

    Atomic weight nitrogen = 14.0067

    Atomic weight hydrogen = 1.00794

    Atomic weight carbon = 12.0107

    Atomic weight oxygen = 15.999

    Looking at the formula (NH4) 2CO3, we have 2 nitrogen, 8 hydrogen, 1 carbon, and 3 oxygen atoms. So the formula mass is:

    2 * 14.0067 + 8 * 1.00794 + 12.0107 + 3 * 15.999 = 96.08462 grams

    And conveniently, the molar mass of a substance is exactly the same as the formula mass. So it too is 96.08462 grams/mol
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