Chemistry help! I need help solving some of these problems?

Posted on 2014-11-19 05:31:00 in Chemistry by STEVO

If 1.50mol of oxygen gas exerts a pressure of 1400mmHg at 10?C, what is the volume in liters?
Express your answer to three significant figures and include the appropriate units.

A sample of unknown gas weighs 2.90g and occupies 5.00L at 1.05atm and 50?C.
What is the molar mass of the unknown gas?

A sample of chlorine gas occupies 1850mL at 0.950atm and 60?C.
What is the mass of the sample?

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