# One of two identical balloons contained carbon dioxide (CO2, 44 g mol−1) and the other contained hydrogen (H2, 2.0 g mol−1). If it took 24 hours for all of the H2 to escape from its balloon, how long did it take for all of the CO2 to escape?

##### 1 Answer

Apr 21, 2017

#### Explanation:

Use Graham's Law:

*Note: #r# is the rate of effusion, #M# is the molar mass of the gas, and #t# is the time the gas took to effuse. Also, know that this formula only works if both gasses are at the same temperature.*

Since molar mass and time is given, we will use the second half of the formula.

Since there are only 2 significant figures the answer would be