Petra and Huy are doing a class demonstration to show that solids, liquids, and gases all have mass. They use a balance for the solids and the liquids. They wondered if gases have mass.
Which is the best way for them to show that air has mass?
Use a fan to make a current of air.
Compare the masses of two inflated balloons.
Heat water to show it changing to water vapor.
Compare the masses of an inflated and empty balloon.
