Question

28.5 mol of P₄O₁₀ contains how many moles of P?
a) 14.25
b) 28.5
c) 57
d) 114

Answer 1

28.5 moles of P4O10 contains 114 moles of phosphorus (P), as there are 4 atoms of phosphorus in each molecule of P4O10, giving a mole ratio of 4:1.

Step-by-step explanation:

The question is asking how many moles of the element phosphorus (P) are contained in 28.5 moles of the chemical compound phosphorus pentoxide (P4O10). To find this, we need to know the mole ratio of P to P4O10 within the compound. Since each molecule of P4O10 contains 4 atoms of phosphorus, the mole ratio is 4:1. Multiplying the given 28.5 moles of P4O10 by 4 gives us the total moles of P in the compound, which is 114 moles. Hence, the correct answer is (d) 114.