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At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0 and argon gas: 3.0. If total pressure is 1.15 atm, then calculate the ratio of following respectively: (i) partial pressure of nitrogen gas to partial pressure of oxygen gas (ii) partial pressure of oxygen gas to partial pressure of argon gas (Given: Molar mass of N, O and Ar are 14, 16 and 40 g mol –1 respectively.)

1. 2.59, 11.85
2. 5.46, 17.8
3. 2.96, 11.2
4. 4.26, 19.3

Correct answer: 2.96, 11.2

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