We are asked to calculate the mass percent composition of each constituent element of sulfurous acid.
sulfurous acid → H2SO3
Molar mass H2SO3 = 82.09 g/mol
Molar mass H = 1.01 g/mol
Molar mass S = 32.07 g/mol
Molar mass O = 16.00 g/mol
Calculate the mass percent composition of each constituent element of sulfurous acid.
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