# What is the percent composition o Ba_3(PO_4)_2?

Jun 13, 2016

$\text{% by mass of component}$ $=$

"Mass of component"/"Formula mass of barium phosphate"xx100%

#### Explanation:

The formula mass of $B {a}_{3} {\left(P {O}_{4}\right)}_{2}$ is $601.92 \cdot g \cdot m o {l}^{-} 1$.

If we require the % composition by metal content, the calculation is:

(3xx137.33*g*mol^-1)/(601.92*g*mol^-1)xx100% ~=66%

I have taken the mass of the component and divided it by the molar mass.