CHEM 121 Final Exam B 50 questions, 110 minutes Multiple Choice. Mark the correc
ID: 104920 • Letter: C
Question
CHEM 121 Final Exam B 50 questions, 110 minutes Multiple Choice. Mark the correct answer on your Grad You MUST mark your EXAM B on your Grademaster! 1kg-2.20 pounds emaster sheet. 2.54 cm -1 inch 1 atm -760 mm Hg-760torr L.atm R-0.0821atm mol K 1. In the reaction: 2 CaHa(g) + 7 Oz(g) 4 CO2(g) + 6 H2O(g). increasing the concentration of C2Ho(g) will A) decrease the activation energy of the reaction. B) increase the activation energy of the reaction. C) decrease the reaction rate. D))increase the reaction rate. 2. An equilibrium constant with a value of 5.7 x 10-8 indicates that at equilibrium A) the products are favored B) the reactants are favored. C) present 3. Which length is the longest? B) 12,000 mm D) 12 m A) 12,000 cm C) 0.0012 km When 4.870 x 10-3 is converted to its standard form the number becomes A) 0.004870 C) 4870 4. B) 0.00487 D) 0.0004870 Which element is a metal? A) Si C) C B) D) Li More than one are metals.Explanation / Answer
C2H6 is a reactant, so, increasing concentration of C2H6 will increase the reaction rate. (option D)Keq = [product]/[reactant] So, an equilibrium constant with a value of 5.7 x 10-8 indicates that at equilibrium the reactants are favoured. (option A) Longest length is 12000 cm 4.870 x 10-3 = 0.004870 (option A) Li is metal (option B)