Does the air has a weight?
You betcha! That weight is called air pressure, and it is measured on a barometer.
Take a large container, pump out all the air from inside it. Weigh it. Put air inside and then weigh it again. The difference would be the weight of the air inside. Air molecules have mass (air is "stuff") and things with mass have weight when in a gravitational field, such as on Earth. If air didn't have any weight, we wouldn't even have an atmosphere.
Get a vacuum chamber. Get all the air out of it, and weight it. This is the true weight of just the vacuum chamber. Fill it with air, and then weight it again. Subtract the new weight from the initial weight to get the mass of the air contained within the chamber. Find the volume of the chamber as well. density= mass/ voume. Hope it heelpss(:
Air has weight wherever it is. The weight of a jug full of air depends on the temperature and pressure in the jug. At sea-level pressure and 32 degrees, one pound of air fills about 92.7 gallons, and the air in a 10-ft x 12-ft bedroom with a 7-ft ceiling represents about 67.8 pounds of weight. Don't forget, though, that anything surrounded by fluid is buoyed up by a force equal to the weight of…
Matter is anything that has volume and weight. To prove that air occupies space. Simply blow a balloon to prove air occupies space. To prove air has weight Tie a inflated balloons to a ruler and burst one of them. The side of the ruler with an inflated balloon will move down. To prove that air has weight.
Air exerts pressure in the same way that water exerts pressure on a diver. Air has weight, and because we are at the bottom of a blanket of air that surrounds the earth, the weight of that air is pressing down on us (creating pressure). If you go under water, you'll feel the additional pressure created by the weight of the water above you.