The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
D, carbon dioxide and water. Methane and oxygen PRODUCE carbon dioxide and water in their reaction.
It measures the acidity/basic level, that rules A out
hope this helped a little
