calculate the number moles of gas in a 3.24 L basketball inflated to a total pressure of 24.3 psi at 25 c ( note: the total pressure is not the same as the pressure, called the gauge pressure, is the differnce between the total pressure and atomspheric pressure. in this case, if atmospheric pressure is 14.7 psi, the gauge pressure would be 9.6 psi. however, for calculations involving the ideal gas law, you must use the total pressure of 24.3 psi?