This is because the pressure will build so up so much that the can will burst (and explode if there is a naked flame nearby) the gas pressure increases. more of the liquefied propellant turns into a gas.
This is Boyle's Law. It states pressure and volume have an inverse relationship.
Filtration is a process in which insoluble matter is separated from a liquid. Filtration is a separation process in which a mixture is passed through a filter that allows one component to pass-through but blocks another component from passing through because of its matter and consistency. Heterogeneous mixtures can be separated into their respective constituents. For example, a mixture of mud and water can be separated through filtration process easily, because water being liquid will pass through the filter paper easily but the mud will not because of it being solid
Water is a covalently bonded molecule. H2O-> Oxygen and hydrogen are both nonmetals. Ionic compounds are made up of a nometal and metal which causes it to have electrical components. A covalent bond is stronger than an ionic bond, which allows water to break down ionic salts.