s. E qual numbers of moles of CO2(e). N3(g) and NH3(e) are placed in a wealed vesuel at room. temperature. If the vessel has u pinhole-size loal-, which of the following will be Irue after soine of the gas mixture has effused? 1. The mole fraction of CO2 in the sample will increase. II. The Nj will effuve the fasteat since it is the lightest. 111. All gases will effuse at the same rate since the temperature is held constant. a. I and 111 b. onty 111 c. . . II and 111 d. II and III 9. 10.8482gram sample of KHC s H4Oa reacts with 41.75mL of KOH solution for complete neutralization. What is the molarity of the KOH solution? (Molecular weight of KHC3H4O4= 204g/molJ a. 0.139M b. 0.099M c. 0.061M d. 0,158M c. 0.079M 10. Aluminum reacts with oxygen (O2) to form aluminum oxide (Al2O3). If 75.0g of Al and 200.0g of oxygen are reacted, and 75.0g of aluminum oxide is produced, what is the percent yicid of the product? a. 53% b. 27% c. 18% d. 72% e. 67% II. Three gases are mixed in a sealed container. The container has 0.3 moles of gas A,0.4 moles of gas B, and 0.3 moles of gas C. The total pressure of the gases is 660 torr. What is true about the partial pressures of the gases? a. The partial pressure of gas A is 264 torr. b. The partial pressure of gas B is 396 torr. c. The partial pressure of gas C is 220 torr. d. The partial pressure of gas B is 660 torr. c The partial pressures of gases A and C are each 198 torr