Calculate the ratio of average velocity of helium atoms at `27^@C` and methane molecules at `127^@C`.

Explanation

To calculate the ratio of the average velocity of helium atoms at \(27^\circ C\) and methane molecules at \(127^\circ C\), we can use the formula for the average velocity of gas molecules:

\[ v_{avg} = \sqrt{\frac{8RT}{\pi M}} \]

Where:
- \(v_{avg}\) = average velocity
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