The number of moles of nitrogen atom in 56 g nitrogen is

Options

A. 2 mol
B. 4 mol
C. 8 mol
D. 10 mol

Answer

To find the number of moles of nitrogen atoms in 56 g of nitrogen, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the mass of nitrogen given**:
The mass of nitrogen provided in the question is 56 g.

2. **Determine the molar mass of nitrogen**:
The molar mass of nitrogen (N) is approximately 14 g/mol. Since nitrogen exists as diatomic molecules (N₂) in nature, the molar mass of nitrogen gas (N₂) is 28 g/mol. However, since the question specifically asks for nitrogen atoms, we will use the molar mass of a single nitrogen atom, which is 14 g/mol.

3. **Use the formula to calculate moles**:
The formula to calculate the number of moles (n) is:
\[ n = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \]

4. **Substitute the values into the formula**:
Now, substituting the values we have:
\[ n = \frac{56 \text{ g}}{14 \text{ g/mol}} \]

5. **Perform the calculation**:
\[ n = \frac{56}{14} = 4 \text{ moles} \]

6. **Conclusion**:
Therefore, the number of moles of nitrogen atoms in 56 g of nitrogen is 4 moles.

### Final Answer:
The number of moles of nitrogen atoms in 56 g of nitrogen is **4 moles**.

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