What is the total pressure, in millimeters of mercury, of a gas mixture containing argon gas at 0.33 atm , helium gas at 330 mmHg , and nitrogen gas at 310 torr ?

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.