A third, but much smaller market segment, consists of cylinder gas deliveries. Cylinder gas shipments are generally limited to expensive specialty gases and mixtures.
Here's what happens when some quantity of a gas is compressed into a cylinder. (The term "amount" in the question is rather slippery.) -- The mass of the gas doesn't change. -- The weight of the gas...
Measure the weight of the full cylinder and note down as m1
Note down the tare weight of the cylinder marked on the cylinder and note down t1
the m1 - t1 = M the weight of gas in...
Many gases are filled in cylinders and include nitrogen, Carbon Dioxide, Helium, Hydrogen, Argon, Acetylene etc. Small cylinders that are extremely portable include butane etc.