Question

A water gas mixture has the composition by volume

Answer 1

The sum of all volume fraction of a mixture is equal to 1 : The volume fraction ( percentage by volume ,vol%) is one way of v expressing the composition of a mixture with a dementioless quatity mass fraction and mole fraction are other

Answer 2

The air around us is the mixture of gasses, mainly nitrogen and oxygen, but containing much smaller amounts of water vapour, argon and carbon dioxide, and very small amounts of other gasses.