Percentage of nitrogen in air is about

Options

A. 0.78
B. 0.69
C. 0.21
D. 0.03-.03%

Answer

To determine the percentage of nitrogen in the air, follow these steps:

1. **Understand the Composition of Air**: Air is a mixture of various gases. The primary components include nitrogen, oxygen, argon, and trace amounts of other gases.

2. **Identify the Major Components**: The major gases in the atmosphere are:
- Nitrogen (N2)
- Oxygen (O2)
- Argon (Ar)
- Other gases (like carbon dioxide, neon, etc.)

3. **Know the Percentages**: According to scientific data:
- Nitrogen constitutes about 78% of the air.
- Oxygen makes up about 21%.
- Argon is approximately 0.9%.
- Other gases account for about 0.1%.

4. **Confirm the Percentage of Nitrogen**: Based on the information provided, the percentage of nitrogen in the air is confirmed to be 78%.

5. **Final Answer**: Therefore, the percentage of nitrogen in air is about 78%.