Using the ideal gas equation.
Isolate n (number of moles of gas):
The mass of an evacuated 255-mL flask is 143.187 g. The mass of the flask filled with 268 torr of an unknown gas at 25 oC is 143.290 g .
Calculate the molar mass of the unknown gas.
Frequently Asked Questions
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 The Ideal Gas Law: Molar Mass concept. You can view video lessons to learn The Ideal Gas Law: Molar Mass. Or if you need more The Ideal Gas Law: Molar Mass practice, you can also practice The Ideal Gas Law: Molar Mass practice problems.