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In an experiment in a general chemistry laboratory, a student collected a sample of a gas over water. The volume of the gas was 265 mL at a pressure of 753 torr and a temperature of 27 °C. The mass of the gas was 0.472 g. What was the molar mass of the gas?

45.88 $\mathrm{gmol}^{-1}$

01:47

Aadit S.

Chemistry 101

Chapter 9

Gases

University of Central Florida

Drexel University

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So the equation that we're going to be looking at today is P gaffes. People to pee mixture, truck P water vapor. So what we have is P gas equal to 753 tour. You subtract 26.7 to 4. We got a final value of 7 to 6.3 tour. So for an ideal gas, um is equal to W R T over P v substitute in some values to find our massive uh, this is all molecular white A mask. So, um, so it was not 0.472 g multiplied by 62.36 tour per liter per molds minus one. Calvin's minus one multiplied by 27 at 273 Calvin that's all divided by 72 7 to 6 went three tour multiplied by 265 middle eaters. And then that entire thing is multiplied by 10 to the 3 mL divided by one liter. We got a value off 45 0.88 g, um, all to minus one

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