Calculate number of atoms in 3 mol of `NH_(3)`.

Explanation

To calculate the number of atoms in 3 moles of \( \text{NH}_3 \), we can follow these steps:

### Step 1: Determine the number of molecules in 3 moles of \( \text{NH}_3 \)
We know that 1 mole of any substance contains \( 6.022 \times 10^{23} \) molecules (Avogadro's number). Therefore, the number of molecules in 3 moles of \( \text{NH}_3 \) can be calculated as follows:

\[ \text{Number of molecules} = 3 \, \text{moles} \times 6.022 \times 10^{23} \, \text{molecules/mole} \]
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