Search 85,461 tutors

1. An unbreakable meteorological balloon is released from the ground.Ground level pressure is 98.5 KPa and the temperature is 18.0 Celsius. The balloon contains 74.0 liters of Hydrogen gas. As the...

A large flask with a volume of 936 mL is evacuated and found to have a mass of 134.66 g. It is then filled to a pressure of 0.967 atm at 31 °C with a gas of unknown molar mass and then reweighed to...

A mixture of four gases exerts a total pressure of 975 mm Hg. Gases A and B each exert 220 mm Hg. Gas C exerts 110 mm Hg. What pressure is exerted by gas D?

On a cold winter morning when the temperature is –13ºC, the air pressure in an automobile tire is 1.5 atm. If the volume does not change, what is the pressure after the tire has warmed to 15ºC?...

Suppose that the pressure of 1.00 L of gas is 380. mm Hg when the temperature is 200. K. At what temperature is the volume 2.00 L and the pressure 0.750 atm?

A sample of gas at constant volume and constant number of moles was cooled from 400 K to 200 K. If its initial pressure was 3.50 atm, what was its final pressure? (answer in mmHg)

A sample of gas in a 3.0 L container has a pressure of 4.0 atm. In order for this sample to have a pressure of 101.3 kPa, what size container is needed? Assume that the temperature and amount of gas...

The pressure in a gastank is 10bars. Calculate the pressure in the gastank as the temprature goes from 20C to 95C   My calculations: 273.15+95= 368.15K 273.15+20= 293...

what is the total mass in grams of oxygen in a room measuring 4.0 m by 5.0 m by 2.5 m? assume that the gas is at STP and that air contains 20.95% oxygen by volume

Imagine we have a balloon filled with argon gas and the room conditions are 1.00 atm and 25°C. Above what temperature would we have to heat the balloon so that it would float? Assume the partial...

need help figuring out what equation to use, and need a good explanation of why and how it works in laymens terms. got lost in chemistry class sometime last week, and need help cataching back up!...