A sample of air contains N2 and O2 ( the principal components of air) and small quantities of other gases and CO2 (greenhouse gas), This sample of air has a total pressure of 1.18 atm . If the partial pressure of O2 in the mixture is 0.350 atm and the partial pressure of N2 is 0.632 atm. Calculate the pressure in atm exerted by the other gas mainly CO2 in the atmosphere. a. 0.198 atm b. 1.18 am c. 1.98 atm d. 0.982 atm

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic