A gas that has a volume of 27 liters, a temperature of 53 0C, and an unknown pressure has its volume increased to 35 liters and its temperature decreased to 32 0C. If I measure the pressure after the change to be 2.0 atm, what was the original pressure of the gas?

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).

Answer//the law of conservation of mass.;