A flask contains argon and chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27°C . The ratio of root mean square speed of the molecules of the two gases ( VrmsArVrmsCl) is: (Atomic mass of argon = 40.0u and molecular mass of chlorine = 70.0u)

Solution & Explanation

Related Formula
vrms = √((3RT)/(M))
Core Logic

At a constant temperature T, vrms ∝ 1√(M).

vrmsArvrmsCl = MClMAr = √((70)/(40)) = √(7)2
Pattern Recognition

RMS speed ratio depends inversely on the square root of molar mass.

Chapter Mix

Class 11 Physics: Kinetic Theory

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