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A gas cylinder contains 370 g oxygen at ...

A gas cylinder contains `370 g` oxygen at `30.0 atm` pressure and `25^(@)C`. What mass of oxygen will escape if the cylinder is first heated to `75^(@)C` and then the valve is held open until gas pressure becomes `1.0 atm`, the temperature being maintained at `75^(@)C`?

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The correct Answer is:
359.44g
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