Chemistry
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Chemistry: The Central Science answer keys
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Chapter 1 1.1 (a) Pure element: i, v (b) mixture of elements: vi (c) pure compound: iv (d) mixture of an element and a compound: ii, iii 1.5 (a) 7.5 cm, 2 significant figures (sig figs) (b) 140?C, 2 sig figs 1.8 1.9 (a) Heterogeneous mixture (b) homogeneous mixture (heterogeneous if there are undissolved particles) (c) pure sub- stance (d) homogeneous mixture. 1.11 (a) S (b) K (c) Cl (d) Cu (e) Si (f) N (g) Ca (h) He 1.13 (a) Lithium (b) alu- minum (c) lead (d) sulfur (e) bromine (f) tin (g) chromium (h) zinc 1.15 C is a compound; it contains carbon and oxygen. A is a compound; it contains at least carbon and oxygen. B is not defined by the data given; it is probably a compound be- cause few elements exist as white solids. 1.17 Physical prop-
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SOTM LAB: C7 I: TEACHER NOTES & GUIDELINES TITLE OF LAB: Chemical Kinetics: Concentration vs. Reaction Rate DEVELOPERS OF LAB: Michael Boms (JD814), Phillip Cameron (JD522), Gail Gold (JD889), Mark Tretter (JD580); Kathy Poncelet (JD521), Mikki Bieber (JD705), Pamela Iacovella (JD723), SOTM staff OVERVIEW OF LAB DESCRIPTION A spectrophotometer will be used to study different aspects of the kinetics of a reaction. The effect of concentration of one of the reactants will be investigated initially to explore the reaction and to introduce students to the use of the Spectronic-20 spectrophotometer. After completing the initial experiment, students will propose and design an experiment to investigate another factor which they think may affect the rate of this reaction.
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AP Chemistry Final Exam Version P Fall 2005 3 Free Response questions, 45 minutes CALCULATORS MAY BE USED. You will also have a periodic table, equation sheets, and the standard reduction potential table. Clearly show the method used and the steps involved in arriving at your answers. It is to your advantage to do this, since you may obtain partial credit if you do and you will receive little or no credit if you do not. Attention should be paid to significant figures. Note: For all questions, assume that the temperature is 298 K, the pressure is 1.00 atmospheres, and solutions are aqueous unless otherwise specified. Record all your work on this exam; you will only be given credit for answers showing work. NAME: PERIOD: 1 2 3 4 January 10-12, 2006
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CALIFORNIA STANDARDS TEST CHEMISTRY (Blueprint adopted by the State Board of Education 10/2002) CALIFORNIA CONTENT STANDARDS: CHEMISTRY # of Items % Atomic and Molecular Structure 6 10.0% 1. The periodic table displays the elements in increasing atomic number and shows how periodicity of the physical and chemical properties of the elements relates to atomic structure. As a basis for understanding this concept: a. Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. 1 b. Students know how to use the periodic table to identify metals, semimetals, non-metals, and halogens. 1
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CALIFORNIA STANDARDS TEST CHEMISTRY (Blueprint adopted by the State Board of Education 10/2002) CALIFORNIA CONTENT STANDARDS: CHEMISTRY # of Items % Atomic and Molecular Structure 6 10.0% 1. The periodic table displays the elements in increasing atomic number and shows how periodicity of the physical and chemical properties of the elements relates to atomic structure. As a basis for understanding this concept: a. Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. 1 b. Students know how to use the periodic table to identify metals, semimetals, non-metals, and halogens. 1
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CALIFORNIA STANDARDS TEST CHEMISTRY (Blueprint adopted by the State Board of Education 10/2002) CALIFORNIA CONTENT STANDARDS: CHEMISTRY # of Items % Atomic and Molecular Structure 6 10.0% 1. The periodic table displays the elements in increasing atomic number and shows how periodicity of the physical and chemical properties of the elements relates to atomic structure. As a basis for understanding this concept: a. Students know how to relate the position of an element in the periodic table to its atomic number and atomic mass. 1 b. Students know how to use the periodic table to identify metals, semimetals, non-metals, and halogens. 1
Organic Reaction Scheme
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Periodic Table
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Chapter 02 test questions
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Chemistry, 11e (Brown/LeMay/Brusten/Murphy) Chapter 2:Atoms, Molecules, and Ions 2.1 Multiple-Choice and Bimodal Questions 1) A certain mass of carbon reacts with 13.6 g of oxygen to form carbon monoxide. __________ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions? A) 25.6 B) 6.8 C) 13.6 D) 136 E) 27.2 Answer: E Diff: 3 Page Ref: Sec. 2.1 2) Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3:1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4:1 by mass. This is an illustration of the law of __________. A) constant composition
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