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Elizabeth Oneill
Chemistry
8 November, 00:24
3.00 moles of NO2 have a mass of
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Kelsie Fitzgerald
8 November, 00:40
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When solving for the mass of a compound when you're given the number of moles present, you need to know the molar mass (how many grams there are in a mole of that compound).
In this case, we can make the following equation:
3.00 (14.01 + 2 (16.00))
In Nitrogen, the molar mass is 14.01 grams per mole, and Oxygen is 16.01 grams per mole.
However, because there are 2 oxygen atoms present per molecule, you must multiply it by two in order to solve for the molar mass.
Anyway:
3.00 (14.01 + 2 (16.00))
Simplify:
3.00 (14.01 + 32.00)
3.00 (46.01)
Multiply:
3.00 (46.01) = 138.03
3.00 moles of NO2 has a mass of 138.03 grams.
-T. B.
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