Straighterline Chemistry Final Exam Test Questions And Answers.

Which of the following molecules has a nonzero dipole moment? Select one: a. BeCl2 b. SF2 c. KrF2 d. CO2 e. CCl4 {Ans: b. SF2}Which one of these materials is a copolymer? Select one: a. Polystyrene-polybutadiene b. Polyvinyl chloride c. Polypropylene d. Poly-cis-isoprene e. Polyethylene {Ans: a. Polystyrene-polybutadiene}The 80Br- ion has Select one: a. 45 protons, 35 neutrons, 45 electrons. b. 35 protons, 45 neutrons, 34 electrons. c. 35 protons, 45 neutrons, 36 electrons. d. 45 protons, 35 neutrons, 46 electrons. e. 35 protons, 45 neutrons, 46 electrons. {Ans: c. 35 protons, 45 neutrons, 36 electrons.}Two dissolved ions in hard water are Mg2+ and _________. Na+ Ca2+ Cu2+ {Ans: Ca2+}Ionic compounds tend to form between metals and nonmetals when electrons are transferred from an element with high ionization energy (metal) to an element with a low electron affinity (nonmetal). Select one: True False {Ans: False}A 25.0-mL sample of 0.10 M C2H5NH2 (ethylamine) is titrated with 0.15 M HCl. What is the pH of the solution after 9.00 mL of acid have been added to the amine? [Kb(C2H5NH2) = 6.5 × 10-4] Select one: a. 11.08 b. 10.74 c. 10.81 d. 10.55 e. 10.49 {Ans: