The average molecular speed in a sample of Ar gas at a certain temperature is 441 m/s. The average molecular speed in a sample of Kr gas is m/s at the same temperature.

A 3.50 L flask was used to collect at 7.85 g sample of propane gas, C3H8. After the sample was collected the gas pressure was found to be 752 mmHg. What was the temperature of the propane in the flask?

A sample of gas has a mass of 38.8 mg. Its volume is 228 mL at a temperature of 56 ∘C and a pressure of 896 torr. Find the molar mass of the gas

An unknown perfect gas was confined to a 340 cm^3 container at 23 °C. The container also contained 73 Torr of N2. The total pressure was 353 Torr and the total mass was 48.1 mg. a) What is the molar mass of this gas? b) What is the gas?

A sample of gas has a mass of 38.6 mg. Its volume is 226 mL at a temperature of 55 ∘C and a pressure of 896 torr. Find the molar mass of the gas.

If the density of a gas is 1.2 g/L at 745 mmHg and 23.5◦C, what is the molar mass of the gas?

The average molecular speed in a sample of AR gas at a certain temperature is 432 m/s. The average molecular speed in a sample of CH4  gas is  m/s at the same temperature.

A mixture of gases contains 4.0 moles of Xe and 8.0 moles of Ar. If the total pressure of the mixture is 600 mmHg, what is the partial pressure os Ar in the mixture?

The density of 1.00 mol of an unknown gas at a temperature of -76oC and a pressure of 2,387 torr is 12.9 g/L.  Calculate the molar mass of the unknown gas.

A sample of gas has a mass of 0.565  g g . Its volume is 115  mL mL at a temperature of 86  ∘C ∘C and a pressure of 755  Torr Torr . Find the molar mass of the gas.   Use the molar volume of a gas at STP to determine the volume (in LL) occupied by 19.8  g g of neon at STP.