A balloon is filled with helium until the volume at a pressure of 1.00 atm is 2.0x104  L. temperature = 300 K. The helium is stored in pressurized cylinders each with a volume of 50.00 L and a He pressure of 150 atm at 300 K. How many cylinders are needed to fill the balloon (The He in the last cylinder may not be used up completely.)?

A gas-filled weather balloon has a volume of 57.0 L at ground level, where the pressure is 767 mmHg and the temperature is 23.9 °C. After being released, the balloon rises to an altitude where the temperature is –5.32 °C and the pressure is 0.0688 atm. What is the weather balloon's volume at the higher altitude? L V =

1. A 270-mL flask contains pure helium at a pressure of 759 torr . A second flask with a volume of 455 mL contains pure argon at a pressure of 717 torr A. If we connect the two flasks through a stopcock and we open the stopcock, what is the partial pressure of helium? Express the partial pressure in torr to three significant figures. B. If we connect the two flasks through a stopcock and we open the stopcock, what is the partial pressure of argon? Express the partial pressure in torr to three significant figures. C. If we connect the two flasks through a stopcock and we open the stopcock, what is the total pressure? Express the total pressure in torr to three significant figures.

A child's balloon containing 6.0L of helium gas at sea level is released and floats away into the atmosphere. What will the volume of the helium be when the balloon rises to the poin where the atmospheric pressure is 380 mmHg? Assume that the temperature and amount of helium remain unchanged.