Problem: A glass vessel fitted with a stopcock has a mass of 337.426 g when evacuated. When filled with Ar, it has a mass of 339.855 g. When evacuated and refilled with a mixture of Ne and Ar, under the same conditions of temperature and pressure, it weighs 339.076 g.What is the mole percent of Ne in the gas mixture?

FREE Expert Solution

mass Ar=339.855 g-337.426g=2.329 g

mass of mixture=339.076 g-337.426g=1.65 g

mass Ne=2.329 g-1.65 g=0.679 g

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Problem Details

A glass vessel fitted with a stopcock has a mass of 337.426 g when evacuated. When filled with Ar, it has a mass of 339.855 g. When evacuated and refilled with a mixture of Ne and Ar, under the same conditions of temperature and pressure, it weighs 339.076 g.

What is the mole percent of Ne in the gas mixture?

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