45. Consider the combustion of toluene (C6H5CH3) according to the following equation: C6H5CH3(l) + O2(g) CO2(g) + H2What is the stoichiometric coefficient of O2in the accepted balanced equation? O (g) a. b. 8.5 c. d. 7 e. 10
____ 46. All of the following are gases at room temperature and atmospheric pressure. Which one will liquefy most easily when pressurized at a certain temperature?
2____ 47. The boiling points of the halogens increase in the order F2< Cl2< Br2< I2due to the resulting increasing _________ interactions.
____ 48. What is the freezing point of a solution made up of 54.9 g of NaCl dissolved in 800.0 g of water? (Kf= -1.86 C/m)
C ____ 49. What is the reducing agentin the following chemical process? Zn (s) + 2 NO3-(aq) + 4 H3O+(aq) Zn2+(aq) + 2 NO2(g) + 6 H2O (l) a. NO3-(aq) b. Zn (s) c. H3O+(aq) d. NO2(g) e. Zn2+(aq)