An arctic weather balloon is filled with 13.8L of helium gas inside a prep shed. The temperature inside the shed is 12.°C. The balloon is then taken outside, where the temperature is −13.°C. Calculate the new volume of the balloon.
You may assume the pressure on the balloon stays constant at exactl 1 atm. Round your answer to 3 significant digits.
A sample of an unknown compound is vaporized at 120.°C. The gas produced has a volume of 2020.mL at a pressure of 1.00 atm, and it weighs 6.52g.
Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits.