Marks: 1 A sample of He gas (3.0 L) at 5.6 atm and 25°C was combined with 4.5 L of Ne gas at 3.6 atm and 25°C at constant temperature in a 9.0 L flask. The total pressure in the flask was __ atm. Assume the initial pressure in the flask was 0.00 atm and the temperature upon mixing was 25°C.
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