# Problem: A sample of C2H2 (g) has a pressure of 7.6 kPa . After some time a portion of it reacts to form C6 H6 (g). The total pressure of the mixture of gases is then 4.0 kPa . Assume the volume and the temperature do not change.Find the mole fraction (in percents) of C2 H2 (g) that has undergone reaction.

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Calculating the mole fraction of C2H2

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###### Problem Details

A sample of C2H2 (g) has a pressure of 7.6 kPa . After some time a portion of it reacts to form C6 H6 (g). The total pressure of the mixture of gases is then 4.0 kPa . Assume the volume and the temperature do not change.

Find the mole fraction (in percents) of C2 H2 (g) that has undergone reaction.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Partial Pressure concept. You can view video lessons to learn Partial Pressure. Or if you need more Partial Pressure practice, you can also practice Partial Pressure practice problems.

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Based on our data, we think this problem is relevant for Professor Lawson's class at UMD.