0.683 mol sample of oxygen gas at a temperature of 10.0 °C is found to occupy a volume of 26.1 liters.?

Update: The pressure of this gas sample is
____ mm Hg?
Update 2: A sample of helium gas collected at a pressure of 181 mm Hg and a temperature of 301 K has a mass of 5.64 grams. The volume of the sample is
_____ L.
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