A metal forms hexagonal close-packed structure? How many voids are present in 0.5 mol of it?

Explanation

To determine the number of voids present in 0.5 moles of a metal that forms a hexagonal close-packed (HCP) structure, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure**:
In a hexagonal close-packed structure, there are two types of voids: tetrahedral and octahedral.

2. **Calculate the Number of Atoms in 0.5 Moles**:
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