Question

Please show work and give detailed explanation

Part 1: Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100.0 cm3 at 95°C and 1000.0 mm Hg

A. 0.19 g/mol B. 35.3 g/mol C. 70.9 g/mol D. 137 g/mol E. 384 g/mol

Part2: A sample of N2 gas at 10.0 °C has a pressure of 543 torr. At what temperature will it have a pressure of 450 torr if the volume remains constant?

A. 8.33 °C B. 12.0 °C C. 66.4 °C D. -38.5 °C E. -77.0 °C

Part 3: At what temperature would a molecule of 4He have a root mean square speed equal to the speed of sound, 331.3 m/s, at 1 atm?

A. 17.6 K B. 253 K C. 273 K D. 293 K E. 17600 K

Part 4: If equal masses of O2(g) and HBr(g) are in separate containers of equal volume and temperature, which one of the following statements is true?

A. The pressure in the O2 container is greater than that in the HBr container.

B. There are more HBr molecules than O2 molecules.

C. The average velocity of the O2 molecules is less than that of the HBr molecules.

D. The average kinetic energy of HBr molecules is greater than that of O2 molecules.

E. The pressures of both gases are the same.

Answer 1

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