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3. b) A gas is composed of 30.4% N and 69.6% O. Its density is 11.1 g/L at (-20C) and 2.5 atm. What are

3. b) A gas is composed of 30.4% N and 69.6% O. Its density is 11.1 g/L at (-20C) and 2.5 atm. What are the emprical and molecular formulas of the gas? (N: 14.0 g/mol, O: 16.0 g/mol) R: 0.0821 L.atm/mol.K.

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