Chem 101
posted by Joni .
A 5.00 liter sample of gas measured at 27 degrees Celcius and 1.25 atm of pressure has a mass of 10.13 grams. What is the molecular weight of the gas in u?

Use PV = nRT and solve for moles = n.
Then moles = grams/molar mass. Solve for molar mass.
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A 5.00 liter sample of gas measured at 27.0*C and 1.25 atm presure has a mass of 10.13 g. What is the formula weight of the gas?