Which of the following statements is incorrect?
(1) At 273oC and 1 atm pressure the volume of a given mass of gas will be twice the volume at 0oC and 1 atm pressure.
(2) At -136.5oC and 1 atm pressure, the volume of a given mass of gas will be half its volume at 0oC and 1 atm pressure.
(3) The mass ratio of equal volumes of NH3 and H2S under similar conditions of temperature and pressure is 1:2.
(4) The molar ratio of equal masses of CH4 and SO2 is 1:4.
