Potassium crystallizes in a body centered cubic lattice. What is the approximate number of unit cells in 4.0g of potassium? Atomic mass of potassium = 39.

Explanation

To find the approximate number of unit cells in 4.0 g of potassium, which crystallizes in a body-centered cubic (BCC) lattice, we can follow these steps:

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

\[ \text{Number of moles} = \frac{\text{Given mass}}{\text{Atomic mass}} \]
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