7. Which of the following would represent the greatest pressure? A) 0.680 atm B) 517 mmHg C) 11.4 psi D) 62106 Pa E) 14.1 in Hg 8. A glass column is filled with mercury and inverted in a pool of mercury. The mercury column stabilizes at a height of 729 mm above the pool of mercury. What is the pressure of the atmosphere? A) 1.04 atm. B) 0.729 atm C) 0.959 atm D) 456 atm E) 0.639 atm 9. Body temperature is about 309 K. On a cold day, what volume of air at 276 K must a person with a lung capacity of 2.2 L breathe in to fill the lungs? A) 2.46 L B) 1.97 L C) 2.08 L D) 3.93 L E) none of these 10. A sample of 35.1 g of methane(CH4) gas has a volume of 3.11 L at a pressure of 2.70 atm. Calculate the temperature. A) 2.92 K B) 46.8 K C) 320 K D) 32.4 K E) 35.0 K 11. Which gas has the highest density? A) He B) Cl₂ C) CH4 D) NH3 E) all gases the same 12. Which gas sample has the greatest number of molecules in one mole of each? A) He B) Cl₂ C) CH4 D) NH E) all gases the same