Which of the following scientists was the first to determine the relationship between the pressure and volume of a gas?

Carbon based or cells?

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way. 

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).