Q Question 1 1 / 1 pts A mass of 2.703 g of an unknown gas is introduced into an evacuated 5.00 L flask. If the pressure in the flask is 0.914 atm at 78 °C, which of the following gases might be in the flask? Question 2 1 / 1 pts Typical atmospheric pressure on top of Mt. Everest (29,035 ft) is 265 mmHg. Convert this value to kilopascals (101,325 Pa = 760 mm Hg) Question 3 1 / 1 pts One mole of CO2 at STP will occupy ________. Question 4 1 / 1 pts Place the following gases in order of increasing average velocity at 25 °C: Ar, Cl2, CH4, and HCl Question 5 1 / 1 pts Carbon dioxide gas diffuses through a barrier at a rate of 0.40 mL/minute. If an unknown gas diffuses through the same barrier at a rate of 0.31 mL/minute, what is the molar mass of the gas?

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