Sodium crystallises in b.c.c unit cell. Calculate the approximate number of unit cells in 9.2 g of solium (Atomic mass of Na = 23u).

Explanation

To calculate the approximate number of unit cells in 9.2 g of sodium (Na), which crystallizes in a body-centered cubic (BCC) structure, we can follow these steps:

### Step 1: Calculate the number of moles of sodium.
To find the number of moles, we use the formula:

\[ \text{Number of moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \]
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