Answer:
The answer to your question is the letter C
Step-by-step explanation:
mass of Na₃PO₄ = ?
Ca₃(PO₄)₂ = 5 g
Balanced chemical reaction
2Na₃PO₄ + 3CaCl₂ ⇒ 6NaCl + Ca₃(PO₄)₂
Process
1.- Calculate the molar mass of Sodium phosphate and calcium phosphate.
Na₃PO₄ = 2[(3 x 23) + (31 x 1) + (16 x 4)]
= 2[69 + 31 + 64]
= 2[164]
= 328 g
Ca₃(PO₄)₂ = (3 x 40) + (31 x 2) + (8 x 16)
= 120 + 62 + 128
= 310 g
2.- Use proportions to find the mass of Na₃PO₄
328 g of Na₃PO₄ -------------------- 310 g of Ca₃(PO₄)₂
x ------------------- 5 g
x = (5 x 328) / 310
x = 1640 / 310
x = 5.29 g of Na₃PO₄