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A gaseous compound is 30.4% nitrogen and 69.6% oxygen by mass. A 5.25-g sample of the...

A gaseous compound is 30.4% nitrogen and 69.6% oxygen by mass. A 5.25-g sample of the gas occupies a volume of 1.00 L and exerts a pressure of 1.26 atm at -4.0°C. What are the empirical and molecular formulas, respectively? Show how you determined the molar mass.

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