Percentage of argon in air is

Options

A. Nearly half as that of `CO_(2)`
B. Nearly half as that of `CO_(2)`
C. Nearly thirty times as that of `CO_(2)`
D. none of these

Answer

To determine the percentage of argon in air, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Composition of Air**:
- Air is a mixture of gases, primarily nitrogen (about 78%) and oxygen (about 21%), with small amounts of other gases, including argon and carbon dioxide.

2. **Identify the Percentage of Argon**:
- The percentage of argon in the atmosphere is approximately 0.93% by volume.

3. **Identify the Percentage of Carbon Dioxide**:
- The percentage of carbon dioxide in the atmosphere is approximately 0.04% by volume.

4. **Compare the Percentages**:
- To find out how many times the percentage of argon is compared to carbon dioxide, we can divide the percentage of argon by the percentage of carbon dioxide:
\[ \text{Ratio} = \frac{\text{Percentage of Argon}}{\text{Percentage of Carbon Dioxide}} = \frac{0.93\%}{0.04\%} \approx 23.25 \]
- This indicates that argon is approximately 23.25 times more abundant than carbon dioxide.

5. **Conclusion**:
- Since 23.25 is nearly 30, we can conclude that the percentage of argon in air is nearly 30 times that of carbon dioxide.

### Final Answer:
The percentage of argon in air is approximately 0.93%, which is nearly 30 times as that of carbon dioxide.