Question

how many moles of p4 is formed for each mole of ca3(po4)2 used?

Answer 1

2Ca₃(PO₄)₂$+$ 6SiO$_2+$ 10C $\to$ P$_4+$ 6CaSiO₃$+$ 10CO

Mole ratio $=2:1$

Moles of P₄ $=\frac{1}{2}×1=0.5$ moles