The Chemical Basis of Life Study Guide

Electrons b molecules c neutrons d protons e atoms 6

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Unformatted text preview: . electrons. b. molecules. c. neutrons. d. protons. e. atoms. 6 . The rate of chemical reactions is influenced by a . the concentration of the reactants. b. temperature. c. enzymes. d. all of the above 7 . A solution with a pH of 5 is a (an) ____ and contains _____ hydrogen ions than a neutral solution. a . base, more b. base, fewer c. acid, more d. acid, fewer 2 . The number of electrons in an atom is equal to a . the number of neutrons. b. the number of protons. c. the atomic number. d. b and c 3 . A polar covalent bond occurs when a . electrons are not shared equally between atoms. b. two atoms share electrons equally. c. an electron is lost from one atom and accepted by another. d. the molecule becomes ionized. e. a hydrogen atom is shared between two different atoms. 8 . A buffer a . slows down chemical reactions. b. speeds up chemical reactions. c. increases the pH of solutions. d. maintains a relatively constant pH. 9 . Water a . is composed of two oxygen atoms and one hydrogen atom....
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This document was uploaded on 03/27/2014.

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