Questions
The speed of sound in hydrogen at STP is v. The speed of sound in a mixture containing 3 moles of hydrogen and 2 moles of oxygen at STP will be
a
v2
b
v5
c
7 v
d
v7
detailed solution
Correct option is D
Let the density of hydrogen be ρ'=2ρ, then the density of oxygen will be 32ρ . The density of the mixture will beρ"=35×2ρ+25×32ρ=14ρSince the pressure is the same, we havev"v=ρ'ρ"=2ρ14ρ=17Talk to our academic expert!
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The rms velocity of a gas at a certain temperature is times than that of the oxygen molecules at that temperature. The gas can be
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