A mixture of 2 moles of helium gas (atomic mass = 4u) , and 1 mole of argon gas (atomic mass = 40 u) is kept at 300 K in a container. The ratio of their rms speeds V r m s h e l i u m V r m s ( a r g o n ) , is close to:

Question

A mixture of 2 moles of helium gas (atomic mass = 4u) , and 1 mole of argon gas (atomic mass = 40 u) is kept at 300 K in a container. The ratio of their rms speeds V r m s h e l i u m V r m s ( a r g o n ) , is close to:, 0.45, 2.24, 0.32, 3.16

MARKS App · Accepted Answer

V R M S = 3 R T M ∴ ( V R M S ) H e ( V R M S ) A r = M A r M H e = 40 4 = 10 = 3.16

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