Calculate the number of nitrogen molecules present in `2.8 g` of nitrogen gas.

Explanation

To calculate the number of nitrogen molecules present in 2.8 g of nitrogen gas, follow these steps:

### Step 1: Calculate the number of moles of nitrogen gas.
To find the number of moles, use the formula:
\[ \text{Number of moles} = \frac{\text{Given mass}}{\text{Molecular mass}} \]
Given:
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