The expression that can be used to calculate the ratio of the rate of effusion of gas is the square root of the molar mass of B ÷ the square root of the molar mass of A. The correct option is A.
What is the rate of effusion?
The rate of effusion of a gas is the moving speed of the molecule and its diffusion and effusion. The diffusion or the effusion of a gas molecule or moles of gas is directly proportional to the speed of its motion.
The rate of effusion can be calculated by dividing the rate of gas and the square of the mass of the gases. The rate of effusion is inversely proportional to the mass of the gas particles.
So the correct formula will be The square root of the molar mass is divided by the square root of the molar mass.
Thus, the correct option is A, The square root of the molar mass of B ÷ the square root of the molar mass of A.
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