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19 September, 09:16

1. Calculate the molar mass of the substances involved in the reaction

a. Citric Acid (H3C6H507)

b. Baking soda (NaHCO3)

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Answers (1)
  1. 19 September, 11:13
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    The molar mass of a substance/chemical is the mass of the sample substance divided by the amount of substance in that sample.

    Explanation:

    In order to calculate the atomic mass of a substance we first obtain the atomic weight of the substance from the periodic table. Then we count the number of atoms of the substance and multiply it with the individual atomic mass.

    Molar mass of Citric Acid (H3C6H5O7) is 192.1235 g/mol

    It is calculated as:

    Molar mass of C₆H₈O₇ = 6 (atomic mass of C) + 8 (atomic mass of H) + 7 (atomic mass of O) = 6 (12.0 g/mol) + 8 (1.0 g/mol) + 7 (16.0 g/mol) = 192.0 g/mol.

    Molar mass of baking soda (NaHCO₃) is 84.0 g/mol

    Molar mass of NaHCO₃ = (atomic mass of Na) + (atomic mass of H) + (atomic mass of C) + 3 (atomic mass of O) = (23.0 g/mol) + (1.0 g/mol) + (12.0 g/mol) + 3 (16.0 g/mol) = 84.0 g/mol.
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