Chemistry 6th Edition Gilbert Test Bank

Test Bank for Chemistry, 6th Edition, Thomas R Gilbert, Rein V Kirss .pdf 1. Which step is a part of the scientific method? a. form a testable hypothesis b. prove the hypothesis right or wrong c. generalize results to various situations d. consider results as determined by a single variable e. stop experimentation once the desired results are achieved 2. For a hypothesis to be considered a valid scientific theory, it must a. summarize experimental data without trying to predict future results. b. be impossible to prove wrong by experiment. c. explain widely observed phenomena based on extensive testing. d. never be modified or expanded. e. be voted on by the scientific community and accepted by all. 3. Which of the following definitions applies to a scientific law? a. a prediction about the results of future scientific investigations b. a concise description of a fundamental scientific truth c. an explanation of repeated observations about nature d. an educated guess about a fundamental scientific truth e. a historically accepted fact 4. Which of the following is a hypothesis? a. Energy is required to vaporize a liquid. b. The composition of a pure substance is fixed and definite. c. Hydrogen gas and oxygen gas can react to form water. d. If the car won’t start, its battery must be dead e. matter cannot be created or destroyed 5. According to the law of definite proportions, a. atoms forming a given compound react in variable proportions depending on conditions. b. different samples of the same compound contain the same proportions of the same elements. c. all compounds containing the same types of atoms have identical properties. d. all compounds containing the same types of atoms have relative masses that are whole-number multiples. e. only one type of molecule can be produced when two elements combine. Answer Key chapter 1 1. Answer: B 2. Answer: C 3. Answer: B 4. Answer: D 5. Answer: B