Midterm 1 Version 1 answers

Midterm 1 Version 1 answers - YOU MAY DETACH THIS PAGE...

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YOU MAY DETACH THIS PAGE Page 1 of 10 The multiple-choice questions are to be answered on the answer sheet provided. All exam materials are to be handed in before you leave. Make sure your name and student ID# are filled in on BOTH this page AND the answer sheet. Insert the answer sheet into the examination booklet. Name: Student #: Section: Signature _____________________ Special code VERSION 1111 CHEMISTRY 120/121 MIDTERM EXAMINATION October 6, 2003 This 50-minute exam consists of 25 multiple-choice questions, each worth 1 point. Total points = 25. Budget your time accordingly. The only permitted aid is a calculator. Please be sure that your name, student # and exam version are on it. Write your name in the spaces provided and color in the appropriate circle below each letter. Write your student number using columns A to I of “IDENTIFICATION NUMBER” and color in the appropriate circle below each number. Use a #2 pencil. Make heavy dark marks that fill the circles completely. Erase cleanly any answer you wish to change. Do not make any stray marks on the answer sheet. You will not get this booklet back nor your answer sheet Some useful information is found on the last page. You may detach that page for reference, but it must be handed in at the end of the exam. Do not detach any other pages.
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YOU MAY DETACH THIS PAGE Page 2 of 10 There are 25 multiple choice questions, each worth 1 point. Please answer these on the answer sheet provided, NOT by circling the choices after each question. Read carefully the instructions on page 1. 1. According to the law of definite proportions: a . the ratio of the masses of the elements in a compound is always the same . b. if the same two elements form two different compounds, they do so in the same ratio. c. it is not possible for the same two elements to form more than one compound. d. the total mass after a chemical change is the same as before the change. e. the total pressure of a gas sample is proportional to the sum of the partial pressures of the individual gasses 2. Which one of the following statements about atomic structure is false ? a . The number of protons and neutrons is always the same in the neutral atom. b. The protons and neutrons in the nucleus are very tightly packed. c. The electrons occupy a very large volume compared to the nucleus. d. Almost all of the mass of the atom is concentrated in the nucleus. e. the mass of a proton is many time that for the electron
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Midterm 1 Version 1 answers - YOU MAY DETACH THIS PAGE...

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