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What is the molecular weight of benzoic acid?

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Quick Answer

The molecular weight of benzoic acid is 122.12 atomic mass units. The molecular weight of a compound is calculated by adding together the atomic weight of each atom of each element contained in the molecule. The chemical formula for benzoic acid is C7H6O2.

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Full Answer

The atomic weight of each carbon atom is about 12 amus, for a total mass of 84 amus in one molecule of benzoic acid. The total atomic mass of hydrogen for each molecule of benzoic acid is about 6 amus. This is calculated by adding 1 amu per atom of hydrogen. The atomic weight of each atom of oxygen is about 16 amus.

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