4.
a. Name a benefit of using the outer coating of bacteria to make a vaccine

Explanation:

Hello,

Since the rms speed is defined as:

Whereas is the molecular mass of the gas, we solve for it since it is involved in the mathematical definition of both the most probable (mp) speed and the average speed (a):

(remember that J=kg*m/s^2 that's why the result lies on kg/mol).

Now, the mp speed is computed via:

Finally, the average speed is computed via:

Best regards.