chemistry
posted by jen .
sample of argon gas collected at a pressure of 1.11 atm and a temperature of 28.0 oC is found to occupy a volume of 20.3 liters. How many moles of Ar gas are in the sample?

chemistry 
DrBob222
Use PV = nRT and solve for n = number of moles. Don't forget to convert T to kelvin.
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