Calculate the rms speed of helium atoms at 1200 K. See Appendix F for the molar mass of helium atoms.

Explanation

To calculate the root mean square (rms) speed of helium atoms at a temperature of 1200 K, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Formula for RMS Speed**:
The formula for the root mean square speed (Vrms) of gas molecules is given by:
\[
V_{rms} = \sqrt{\frac{3RT}{M}}
...