Find the Mass Percentages P

$P$

Step 1

To find the mass of $1$ mole of $P$ 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 $1$ mole of $P$ $=$ $(mass of P)$

Step 2

Fill in the atomic masses from the periodic table.

mass of $1$ mole of $P$ $=$ $(30.96999931)$

Step 3

Remove parentheses.

mass of $1$ mole of $P = 30.96999931 g$

Step 4

Find the mass percentage of $P$ .

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

Mass percentage of $P = \frac{30.97}{30.96999931} \cdot 100$

Divide $30.97$ by $30.96999931$ .

$1.00000002 \cdot 100$

Multiply $1.00000002$ by $100$ .

$100.00000221$

Set the number as a percent.

Mass percentage of $P = 100.00000221 %$

Find the Mass Percentages P

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