Baillie and Fajardo CHEM 104 Practice Problem Setendothermic
57. Which of the following statements is/are FALSEconcerning the order of a reaction? 1. can be deduced from the stoichiometry of the reaction 2. gives the reaction mechanism3. is determined experimentallyA) 1 only B) 2 only C) 3 only D) 1 and 2 only E) 2 and 3 only
58. Which of the following is/are FALSE concerning a catalyst and a chemical reaction?1. It changes the stoichiometry. 2. It decreases the activation energy.3. It provides an alternate reaction mechanism.
59. The activation energy for a reaction can be changed by1. adding more reactants. 2. adding a catalyst.3. providing another reaction pathway.
60.188W decays by first order with a t1/2= 69 days. After how many days will the initial amount of the reactant to be at 12.5%?
E) 276 d61. Thyroxine, an important nonelectrolyte hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is 5.144°C. Pure benzene freezes at 5.444°C and has a Kfof 5.12°C/m. What is the molar mass of thyroxine in g/mol?