CHM 2045C Module Six Sample Exam

Module Six Part H-1 Gas Density Problem 3 points

Calculate the gas density of octane gas C₈H₁₈ vapor at STP?

Module Six Part H-2 Molecular Mass Determination Problem 2 points

Calculate the molecular weight of an unknown liquid that when vaporized at 99 ^oC and 755 torre , gave 125.0 mL of vapor with a mass of 0.673 grams .

Module Six Part I Effusion of Gasses Problem 5 points

A sample of Nitrogen gas escapes through a tiny hole in 44.0 seconds. An unknown gas escapes under the same conditions in 80.0 seconds. Calculate the molecular mass of the unknown.