Calculate the number of mol of helium in a 2.49-L balloon at 31°C and 2.88 atm of pressure. Be sure to answer all parts. 下 mol ai th

If a sample of helium gas has a volume of 120 mL and a pressure of 850 mm Hg, what is the new volume if the pressure is changed to 425 mm Hg (n and T are constant)?

A balloon is filled with 2 liters of air at sea level. If the balloon is taken up a mountain so that the new air pressure is approximately 0.94 atmospheres, what will the new volume of the balloon be? Round to the nearest hundredth

What mass of helium gas is required to fill a 5.0L balloon to a pressure of 1.1 atm at 25oC.

A flask contains a mixture of He and Ne at a total pressure of 3.51 atm. There are 2.54 mol of He and 3.45 mol of Ne in the flask. The partial pressure of the He is atm. Give your answer to 3 significant digits.

Convert the pressure of 3.4 atm to mm Hg. Answer in units of mm Hg.

A mixture of neon and nitrogen gases is maintained in a 8.77 L flask at a pressure of 2.88 atm and a temperature of 82 °C. If the gas mixture contains 4.74 grams of neon, the number of grams of nitrogen in the mixture is  ____ g.

What volume is occupied by a 1.38 mol sample of helium gas at a temperature of 0 °C and a pressure of 1 atm?______L

A balloon of H2 and a balloon of O2 are floating in our classroom. Thus, they're at the same pressure and temperature. The volume of H2 balloon is 4 times the volume of the O2 balloon. What is ratio between the mass of H2 and the mass of O2? mass H2  over mass O2

For questions 2-4 show all calculations. 2 A 100-milliliter sample of a gas at a pressure of 380. torr is reduced to 190. torr at con- stant temperature. What is the new volume of the gas?