Answer:
0.102 mol
Step-by-step explanation:
Step 1: Write the balanced equation
PCl₅ + 4 H₂O ⇒ 5 HCl + H₃PO₄
Step 2: Calculate the moles corresponding to 7.36 g of H₂O
The molar mass of H₂O is 18.02 g/mol.
7.36 g × 1 mol/18.02 g = 0.408 mol
Step 3: Calculate the moles of PCl₅ required to react with 0.408 moles of H₂O
The molar ratio of PCl₅ to H₂O is 1:4.
0.408 mol H₂O × 1 mol PCl₅/4 mol H₂O = 0.102 mol PCl₅