that's how hot these gas particles in sample or we talk about gas another important characteristic is pressure alright how hard are these gas particles balancing against the side attack how much pressure the picture and we can measure these within our pressure gauge or something like that on the top of the stack we can say I don't know the pressure for this is 3.1 atm pressure and another thing week spent a lot of time talking about when it comes to gas is volume and again I have these letters here I there how each one of these things you agree volume be volume in his tank might be something like ha 95.2 L and finally look at these particles a doctor there's a certain amount of gas it said and the amount of gas which is abbreviated by the letter little letter can is usually reported moles.