The label has come off a cylinder of gas in your laboratory. You know only that one species of gas is contained in the cylinder, but you do not know whether it is hydrogen, oxygen, or nitrogen. To find out, you evacuate a 5-liter flask, seal it and weigh it, then let gas from the cylinder flow into it until the gauge pressure equals 1.00 atm. The flask is reweighed, and the mass of the added gas is found to be 13.0 g. Room temperature is 27°C, and barometric pressure is 1.00 atm. What is the gas?

A 10.00 L tank at -7.0 °C is filled with 4.65 g of sulfur hexafluoride gas and 3.91 g of dinitrogen monoxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas. Round each of your answers to 3 significant digits. gas mole fraction sulfur hexafluoride dinitrogen monoxide 国 同 同 回

A 10.0 L tank at 3.85 °C is filled with 10.3 g of sulfur hexafluoride gas and 6.25 g of dinitrogen difluoride gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. Be sure your answers have the correct number of significant digits. mole fraction: x10 sulfur hexafluoride partial pressure: atm mole fraction: dinitrogen difluoride partial pressure: atm Total pressure in tank: atm

Gases are different from solids and liquids. In a sample of gas, the molecules are far apart. The gas molecules also move around and collide with each other as well as with the walls of the container. These collisions generate pressure. The pressure of a gas can be measured in different units. One convenient unit of measure is called the atmosphere (atmatm) because it is based on atmospheric pressure. At sea level, the average pressure is 1 atmatm. As you get higher in altitude, the pressure steadily drops until you leave the atmosphere, where the pressure is very close to 0 atmatm. The table below shows the different commonly used units of measuring gas pressure. Use this table in the pressure unit conversions. Unit Abbreviation 1 atm equivalent atmosphere atmatm 1.00 atmatm (exact) millimeters of mercury mmHgmmHg 760 mmHgmmHg torr torrtorr 760 torrtorr inches of mercury in.Hgin.Hg 29.9 in.Hgin.Hg pounds per squareinch (psi) lb/in.2lb/in.2 14.7 lb/in.2lb/in.2 pascal…