Problem: Determine the chemical formula of each of the following compounds and then use it to calculate the mass percent composition of each constituent element.sulfurous acid

FREE Expert Solution

mass percent=mass elementtotal mass of compound×100


sulfurous acid:

sulfurous → change "-ous to "-ite" → sulfite ion → SO32-

acid → add H+

2 H+ + SO32- → H2SO3

sulfurous acid: H2SO3


molar mass H = 1.01 g/mol

molar mass S = 32.06 g/mol

molar mass O = 16.00 g/mol


molar mass H2SO3 = (1.01 g/mol x 2) + 32.06 g/mol + (16.00 g/mol x 3)

molar mass H2SO3 = 82.08 g/mol



Mass percent of H:

total mass H = 1.01 g/mol x 2

total mass H = 2.02 g/mol

View Complete Written Solution
Problem Details

Determine the chemical formula of each of the following compounds and then use it to calculate the mass percent composition of each constituent element.

sulfurous acid

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent Formula concept. You can view video lessons to learn Mass Percent Formula. Or if you need more Mass Percent Formula practice, you can also practice Mass Percent Formula practice problems.