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Please help me with these three questions. My prof gave them to me online and I...

Please help me with these three questions. My prof gave them to me online and I have no clue how to do them.

1) 0.570 mol sample of carbon dioxide gas at a temperature of 23.0 °C is found to occupy a volume of 25.8 liters. The pressure of this gas sample is _______ mm Hg.

2)A sample of neon gas collected at a pressure of 590 mm Hg and a temperature of 301 K has a mass of 26.2 grams. The volume of the sample is __________ L.

3)A 0.551 gram sample of hydrogen gas has a volume of 839 milliliters at a pressure of 3.01 atm. The temperature of the H2 gas sample is _______ °C.

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