The rate of gas diffusion is ---Select--- proportional to temperature because a higher temperature means a/an increase in the kinetic energy of molecules. The rate of gas diffusion is ---Select--- proportional to the molecular weight of the gas because gas particles with higher masses require ---Select--- energy to move compared to gas particles with lower masses.

The rate of gas diffusion is directly proportional to temperature

Explanation:

The rate of gas diffusion is

a) directly proportional to square root of temperature

b)  inversely proportional to the square root of density

c) directly proportional to pressure

d) inversely proportional time and square root of molecular mass

Thus, option A is correct

the answer is d.) potassium