Answer:
[tex]\boxed{\text{170.0 g P}}[/tex]
Explanation:
The formula of calcium nitride is Ca₃P₂.
The masses of each element are:
[tex]\begin{array}{lrcr}\text{3Ca:} & 3 \times 40.08&=& \text{120.24 u}\\\text{2P:} & 2\times 30.97&=& \text{61.94 u}\\& \text{TOTAL} & = & \text{182.18 u}\\\end{array}[/tex]
So, there are 61.94 g of P in 182.18 g of Ca₃P₂.
In 500 g of Ca₃P₂:
[tex]\text{Mass of P} = \text{500.0 g Ca$_{3}$P$_{2}$} \times \dfrac{\text{61.94 g P}}{\text{182.18 g Ca$_{3}$P$_{2}$}} = \text{170.0 g P}[/tex]
There are [tex]\boxed{\textbf{170.0 g P}}[/tex] in 500.0 g of Ca₃P₂.
