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A closed container with volume of 6.50 L holds 10.8 g of liquid helium at 3.00...

A closed container with volume of 6.50 L holds 10.8 g of liquid helium at 3.00 K and enough air to fill the rest of its volume at a pressure of 1.00 atm. The helium then evaporates and the container warms to room temperature (293 K). What is the final pressure inside the container?
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