The Helium-filled balloon is initially inflated to a radius of 6 inches (assume a sphere). The balloon’s empty mass is 10 g. The density of the rubber is 0.8 g/cm3.  What is the approximate thickness of the balloon wall?

Q1. An organic chemist isolates a colourless liquid from a petroleum sample. She places the liquid in a flask and puts the flask in a boiling water bath, which vaporizes the liquid and fills the flask with gas. She closes the flask, reweighs it, and obtains the following data: Volume of flask (V) = 213 mL T=100°C P=754 torr (760 torr in 1 atmosphere) Mass of flask+gas = 78.416g Mass of empty flask = 77.834g Calculate the molar mass of the liquid, carefully converting to appropriate units, where necessary. (Note: Gas constant; R = 0.082057 L.atm.K-¹.mol-¹)

A party balloon filled with helium deflates to 2323 of its original volume in 8.0 hours. How long will it take an identical balloon filled with the same number of moles of air (ℳ = 28.2 g/mol) to deflate to 1212 of its original volume?

On average, a scuba tank provides 670 L of useful air. If a resting breathe has a volume of 0.50 L, how many breathes can a diver expect to get from a single scuba tank?

5) A mountain peak is 4.26 km above sea level. A climber is 540m below the summit. How high above sea level is the climber?

What is the new volume of a 1.75L sample of nitrogen that is heated from 25 C to 300 C?

A sample of methane gas collected at a pressure of 438 mm Hg and a temperature of 292 K has a mass of 11.2 grams. The volume of the sample is____L.

According to Dalton, the pressure exerted by a gas inside a container is proportional to the number of molecules of that gas.  If 4.00 x 1023 molecules of N2 and 2.00 x 1023 molecules of O2 are mixed in a container they exert a total pressure of 1686 torr.  What portion of that pressure (in torr units) is exerted by the N2?  Report answer to four significant figures in decimal notation. _____________________ torr,   What portion of that pressure (in torr units) is exerted by the O2?  Report answer to four significant figures in decimal notation. ____________________ torr

A balloon at 30.0 °C has a volume of 222 mL. If the temperature is increased to 63.1 °C and the pressure remains constant, what will the new volume be, in ml?