A 100 L Flask at 318 K Contains a Mixture of of Ar

question 31

Multiple Choice

A 10.0 L flask at 318 K contains a mixture of Ar and CH₄ with a total pressure of 1.040 atm.If the mole fraction of Ar is 0.715,what is the mass percent of Ar?

• A) 13.8%
• B) 68.8%
• C) 71.5%
• D) 82.9%
• E) 86.2%

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