Calculate the approximate number of unit cells present in 1 g of gold. Given that gold cyrstallises in a face centred cubic lathce (Given atomic mass of gold = 197 u).

Explanation

To calculate the approximate number of unit cells present in 1 g of gold, we can follow these steps:

### Step 1: Determine the number of moles of gold in 1 g.
The number of moles (n) can be calculated using the formula:
\[ n = \frac{\text{mass}}{\text{molar mass}} \]
Given:
- Mass of gold = 1 g
- Molar mass of gold = 197 g/mol
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