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MHT CET Chemistry question

ChemistryStates of Matter (Gaseous & Liquid State)MHT CET

A flask contains 12 g of a gas of relative molecular mass 120 at a pressure of 100 atm was evacuated by means of a pump until the pressure was 0.01 atm. Which of the following is the best estimate of the number of molecules left in the flask? [MHTCET 2018]

Answer: (B)

Solution

Initially mol at 100 atm; at fixed and , , so

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Question ID VK-069807