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The molecular weight is found by adding the atomic masses of all of the atoms that form the molecule. Example: sulfuric acid, H2SO4:

H 1.01 x 2 = 2.02

S 32.07 x 1 = 32.07

O 16.00 x 4 = 64.00

98.07, the molecular wt of sulfuric acid

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Q: Sample of how do you calculate molecular weight?
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