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The highest vacuum attained so far is of the order of 10-11 mm of Hg. How many molecules are there in 1m3 of a vessel under such a high vacuum at ?
detailed solution
Correct option is A
PV=nRT=NNART=NkT⇒N=PVkT=10−11(13000)(9.8)(1)1.38×10−23(273)=3.5×1014Talk to our academic expert!
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Two identical containers A and B have frictionless pistons. They contain the same volume of an ideal gas at the same temperature. The mass of the gas in A is mA and that in B is mB. The gas in each cylinder is now allowed to expand isothermally to double the initial volume. The change in the pressure in A and B, respectively, is p and 1.5 p. Then
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