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A 1 L flask contains 32g of O2 gas at 27°C. What mass of O2 must be released to reduce the pressure in the flask to 12.315 atm? 

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A 1 L flask contains 32g of O2 gas at 27°C. What mass of O2 must be released to reduce the pressure in the flask to 12.315 atm? 

(a) 8 g 

(b) 16 g 

(c) 24 g 

(d) 0 g

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Correct option is (b) 16 g

From ideal gas equation,

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