One mole of N, represents which one of the following?

Options

A. 28g of nitrogen
B. 22.4 L at STP
C. `6.022xx10^(23)N_(2)`, molecules
D. All the three

Answer

To solve the question "One mole of N, represents which one of the following?" we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Moles**:
- A mole is a unit in chemistry that represents a specific number of particles, which is Avogadro's number (approximately \(6.022 \times 10^{23}\)).
- It can represent atoms, molecules, or other entities.

2. **Option A: 28 grams of nitrogen**:
- Nitrogen (N) has an atomic mass of approximately 14 g/mol.
- Therefore, one mole of nitrogen gas (N₂) consists of two nitrogen atoms, which gives a molar mass of \(14 \times 2 = 28\) grams.
- Thus, this statement is true.

3. **Option B: 22.4 liters at STP**:
- At Standard Temperature and Pressure (STP), one mole of any ideal gas occupies a volume of 22.4 liters.
- Since nitrogen is a gas, one mole of nitrogen gas (N₂) will also occupy 22.4 liters at STP.
- Hence, this statement is also true.

4. **Option C: \(6.022 \times 10^{23}\) nitrogen molecules**:
- By definition, one mole of any substance contains \(6.022 \times 10^{23}\) particles (atoms, molecules, etc.).
- Therefore, one mole of nitrogen gas (N₂) contains \(6.022 \times 10^{23}\) nitrogen molecules.
- This statement is true as well.

5. **Conclusion**:
- Since all three statements are correct, the final answer is that one mole of nitrogen represents all of the above: 28 grams of nitrogen, 22.4 liters at STP, and \(6.022 \times 10^{23}\) nitrogen molecules.

### Final Answer:
One mole of nitrogen represents all of the following: 28 grams of nitrogen, 22.4 liters at STP, and \(6.022 \times 10^{23}\) nitrogen molecules.

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