Mass of 1 mole of nitrogen atoms is:

Options

A. 28 g
B. 14.0 g
C. 28 amu
D. 14 amu

Explanation

To find the mass of 1 mole of nitrogen atoms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Atomic Mass of Nitrogen:**
- The atomic mass of nitrogen (N) is given as 14 amu (atomic mass units).

2. **Understand the Conversion of Atomic Mass Units to Grams:**
- 1 amu is equivalent to 1.67 x 10^-24 grams. This is important for converting the atomic mass into grams.

3. **Calculate the Mass of One Nitrogen Atom in Grams:**
- To find the mass of one nitrogen atom in grams, we multiply the atomic mass by the conversion factor:
\[ \text{Mass of one nitrogen atom} = 14 \, \text{amu} \times 1.67 \times 10^{-24} \, \text{grams/amu} \]

4. **Use Avogadro's Number:**
- Avogadro's number (6.022 x 10^23) tells us how many atoms are in one mole of a substance. Therefore, to find the mass of 1 mole of nitrogen atoms, we multiply the mass of one nitrogen atom by Avogadro's number:
\[ \text{Mass of 1 mole of nitrogen atoms} = \text{Mass of one nitrogen atom} \times 6.022 \times 10^{23} \]

5. **Final Calculation:**
- Since we already know that the mass of one nitrogen atom is 14 amu (which is equivalent to 14 grams for 1 mole), we can directly state:
\[ \text{Mass of 1 mole of nitrogen atoms} = 14 \, \text{grams} \]

### Conclusion:
The mass of 1 mole of nitrogen atoms is **14.0 grams**.