# Chemistry Examples

To find the mass of mole of look up the atomic mass of each element and multiply it by the number of atoms contained in each element in the molecule.

mass of mole of +

Fill in the atomic masses from the periodic table.

mass of mole of +

Remove parentheses.

mass of mole of

Add and to get .

mass of mole of

mass of mole of

The mass composition percentage is the mass of divided by the mass of the entire molecule converted to a percentage.

Mass percentage of

Cancel the common factor of .

Write as a fraction with denominator .

Factor out the greatest common factor .

Cancel the common factor.

Rewrite the expression.

Simplify.

Multiply and to get .

Divide by to get .

Set the number as a percent.

Mass percentage of

Mass percentage of

Find the mass percentage of .

The mass composition percentage is the mass of divided by the mass of the entire molecule converted to a percentage.

Mass percentage of

Cancel the common factor of .

Write as a fraction with denominator .

Factor out the greatest common factor .

Cancel the common factor.

Rewrite the expression.

Simplify.

Multiply and to get .

Divide by to get .

Set the number as a percent.

Mass percentage of

Mass percentage of

The mass composition percentage is the mass of divided by the mass of the entire molecule converted to a percentage.

Mass percentage of

Cancel the common factor of .

Write as a fraction with denominator .

Factor out the greatest common factor .

Cancel the common factor.

Rewrite the expression.

Simplify.

Multiply and to get .

Divide by to get .

Set the number as a percent.

Mass percentage of

Mass percentage of

Find the mass percentage of each element in the molecule.

Mass percentage of

Mass percentage of