Complete and balance the following equation :
`P_4 O_10 + PCl_5 rarr`.

Explanation

To complete and balance the equation for the reaction between phosphorus pentoxide (P₄O₁₀) and phosphorus pentachloride (PCl₅), we can follow these steps:

### Step 1: Write the unbalanced equation
The initial unbalanced equation is:
\[ P_4O_{10} + PCl_5 \rightarrow ? \]

### Step 2: Identify the products
When phosphorus pentoxide (P₄O₁₀) reacts with phosphorus pentachloride (PCl₅), it forms phosphoryl chloride (POCl₃). Therefore, we can write the products as:
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