Calculating Percent Composition

Mrs. Page10th Chemistry

•Percent Composition - The percent composition of a component in a compound is the percent of the total mass of the compound that is due to that component.

What is the percentage of the various elements in Sodium Carbonate, Na2CO3

• Find the molar mass of the compound by adding up the masses of each atom in the compound. • Calculate the mass due to the component in the compound you are for

which you are solving by adding up the mass of these atoms. • Divide the mass due to the component by the total molar mass of the

compound and multiply by 100.

What is the percentage of the various elements in SiCl3Br• Find the molar mass of the compound by adding up the masses of

each atom in the compound. • Calculate the mass due to the component in the compound you are

for which you are solving by adding up the mass of these atoms. • Divide the mass due to the component by the total molar mass of

the compound and multiply by 100.

What is the percentage of the various elements in Ammonium sulfate?• Find the molar mass of the compound by adding up the masses of

each atom in the compound. • Calculate the mass due to the component in the compound you are

for which you are solving by adding up the mass of these atoms. • Divide the mass due to the component by the total molar mass of the

compound and multiply by 100.