In this video you'll learn to calcuate the percent composition by mass of chemical compounds. Percent composition is a common type of problem found in chemistry courses and one you should be able to quickly solve.
Remember, you're finding the percent composition of each element in the compound, one element at a time.
This is a general formula for finding percent composition.
The molar mass of the element means the molar mass for the total number of that element in the compound. For example, in H2O2 we would find the molar mass of H and then multiply by "2" since there are two Hydrogen atoms.More Help and Practice: