A 20 L container holds 0.650 mol of He gas at 37 °C at a pressure of 628.3 bar.

A 20 L container holds 0.650 mol of He gas at 37 °C at a pressure of 628.3 bar.
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A 20 L container holds 0.650 mol of He gas at 37°C at a pressure of 628.3 bar. What will be new ... and 1.25 mol of additional He gas was added to it?
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