Find the typical de-Broglie wavelength associated with a H-atom in helium gas at room temperature `(27^(@)C)` and 1atm pressure, and compare it with the mean separation between two atom under these conditions.

Explanation

To find the typical de-Broglie wavelength associated with a helium atom in helium gas at room temperature (27°C) and 1 atm pressure, and to compare it with the mean separation between two atoms under these conditions, we can follow these steps:

### Step 1: Convert the temperature to Kelvin
The room temperature given is 27°C. To convert this to Kelvin, we use the formula:
\[ T(K) = T(°C) + 273 \]
\[ T = 27 + 273 = 300 \, K \]

### Step 2: Determine the pressure in Pascals
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