A gas at 7.75 x 10 Pa and 17°C occupies a volume of 850. cm. At what temperature, in degrees Celsius, would the gas occupy 720, cm at 8.10 x 10 Pa?

Hh.5.

Torricelli, who invented the barometer, used mercury inits construction because mercury has a very high density,which makes it possible to make a more compact barometerthan one based on a less dense fluid. Calculate the densityof mercury using the observation that the column of mercury is 760 mm high when the atmospheric pressure is1.01 x 105 Pa. Assume the tube containing the mercury isa cylinder with a constant cross-sectional area.

A gas occupies 0.19 L when the temperature is20°C and the pressure is 9.97 × 104 Pa. Its mass is0.132 g. This gas may be ______.

0.52 mol of argon gas is admitted to an evacuated 3.00 liter (3.00 × 10-3 m3) container at 20.0°C. What is the pressure of the gas, in atm? 1.00 atm = 1.00×105 Pa.

A sample of helium gas was collected over water. The volume of gas was 10.54 L, room pressure was 103.9 kPa, and the temperature was 24.0°C. What was the mass of the helium gas?

The density of methane gas is measured at four sets of conditions. Under which set of conditions is the density of CH4 the greatest? (a) T = 300K, P = 1 atm; (b) T = 325K, P = 1 atm; (c) T = 275K, P = 2 atm; (d) T = 300K, P = 2 atm.

Q1. An organic chemist isolates a colourless liquid from a petroleum sample. She places the liquid in a flask and puts the flask in a boiling water bath, which vaporizes the liquid and fills the flask with gas. She closes the flask, reweighs it, and obtains the following data: Volume of flask (V) = 213 mL T=100°C P=754 torr (760 torr in 1 atmosphere) Mass of flask+gas = 78.416g Mass of empty flask = 77.834g Calculate the molar mass of the liquid, carefully converting to appropriate units, where necessary. (Note: Gas constant; R = 0.082057 L.atm.K-¹.mol-¹)

A 2.00 L gas bulb contains 4.07 x 1023 N2 molecules. The pressure is 3.05 atm and the root-mean-squared speed is 310 m/sec. What is the temperature?

A 10.0 gg sample of krypton has a temperature of 25∘C∘C at 567 mmHgmmHg. What is the volume, in milliliters, of the krypton gas?   Express your answer to three significant figures and include the appropriate units.