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Chemistry 6 Online
OpenStudy (anonymous):

An experiment shows that a 153-mL gas sample has a mass of 0.171 g at a pressure of 761 mm Hg and a temperature of 32oC. What is the molar mass of the gas? R=0.0821 L atm / mol K

OpenStudy (aaronq):

Use the ideal gas law, find moles. Use those moles and the mass given to find the molar mass.

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