Density of KBr is `2.75 g//cm^(3)`. The edge length of unit cell is 654 pm. Find the type of unit cell of KBr. (At mass of K = 39 and Br = 80).

Explanation

To determine the type of unit cell of KBr based on the given density and edge length, we will follow these steps:

### Step-by-Step Solution:

1. **Convert Edge Length to Centimeters**:
The edge length of the unit cell is given as 654 pm (picometers). We need to convert this to centimeters.
\[
1 \text{ pm} = 10^{-12} \text{ m} = 10^{-10} \text{ cm}
...