What mass of oxygen gas measured at 238 k and 351 atm is

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What mass of oxygen gas, measured at 238 K and 3.51 atm, is required in order to release 6670 kJ of heat to the surroundings?
CH4 + 2 O2 -> CO2 + 2 H2O "H = -890.3 kJ 

Reference no: EM13384743

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