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A container of fixed volume contains 0.9 mol of oxygen gas, which we treat as an...

A container of fixed volume contains 0.9 mol of oxygen gas, which we treat as an ideal gas. Determine the mass of gas (in kg) that must be withdrawn in an isothermal manner from the container to lower the pressure from 42 atm to 26 atm. (The answer must not be in scientific notation).

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