Question

A 500 mL flask has a measured volume of 586.0 mL. A 0.608g sample of an unknown vapor occupies the flask at 373K at a pressure of 0.981atm. Assume the vapor behaves ideally. What is the molecular weight of the unknown vapor?
Use PV = nRT and solve for n = number of mols. Then n = grams/molar mass. You know mols and grams, solve for molar mass.

Related Questions

An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured tem... Chlorine pentafluoride gas is collected at -14.0 degrees Celcius in an evacuated flask with a measur... A 5 mL sample of an unknown liquid is placed into a 250 mL flask that has had all of the air removed...