A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 L bar K -1 mol -1 )

1. A. 498.6
2. B. 49.8
3. C. 4.9
4. D. 2.5

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