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Chemistry: The Central Science, 13e (Brown et al.) Chapter 2 Atoms, Molecules, and Ions 2.1 Multiple-Choice Questions 1) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement of . A) the law of multiple proportions B) the law of constant composition C) the law of conservation of mass D) the law of conservation of energy E) none of the above Answer: B Diff: 2 Var: 1 Page Ref: Sec. 2.1 LO: 2.1 GO: G2 2) Which one of the following is not one of t...

Test Bank Chapter 1 Laboratory Basics 1. Reverse osmosis (RO) is described as a process: A. In which water is forced through a semipermeable membrane that acts as a molecular filter. B. Used to purify liquid chemicals. C. In which water forced through a carbon filter eliminates organic solvents. D. In which salt in water moves through filter paper. 2. Activated carbon filters remove: A. Ions from water. B. Organic compounds from water. C. Acids and bases from water. D. Large particul...

Organic Chemistry, 7e (Bruice) Chapter 1 Remembering General Chemistry: Electronic Structure and Bonding 1) Atoms with the same number of protons but different numbers of neutrons are called . Answer: isotopes Section: 1-1 2) Which of the following elements does this electronic configuration represent? 1s2 2s2 2p5 A) F B) C C) N D) Al E) O Answer: A Section: 1-2 3) How many unpaired electrons are present in the isolated carbon atom (atomic number = 6)? A) none B) one C) two D)...

General Chemistry: Atoms First, 2e (McMurry and Fay) Chapter 0 Chemical Tools: Experimentation and Measurement 0.1 Multiple Choice Questions 1) A consistent explanation of known observations is called A) an experiment. B) a hypothesis. C) a prediction. D) a theory. Answer: D Diff: 1 Topic: Section 0.1 Experiment→Hypothesis→Theory: Approaching Chemistry 2) An interpretation of the results of many tests is called A) an experiment. B) a hypothesis. C) a prediction. D) a theory. ...

TABLE OF CONTENTS Chapter 1 Overview if the Immune System Chapter 2 Cells, Organs, and Microenvironments of the Immune System Chapter 3 Receptors and Signaling: B and T-Cell Receptors Chapter 4 Receptors and Signaling: Cytokines and Chemokines Chapter 5 Innate Immunity Chapter 6 The Complement System Chapter 7 The Organization and Expression of Lymphocyte Receptor Genes Chapter 8 The Major Histocompatibility Complex and Antigen Presentation Chapter 9 T-Cell Development Chapter 10 B-Cel...

Biological Science, 5e (Freeman) Chapter 14 Mendel and the Gene 1) The work of Gregor Mendel provided an answer to two prevailing hypotheses popular at the time. What were these two hypotheses? A) Mitosis is only typical in vertebrates. Meiosis is only typical in invertebrates. B) The two major hypotheses of the time were blending inheritance and inheritance of acquired characteristics. C) Animals use one set of rules for inheritance, while plants use a different set. D) Peas and other d...

Chapter 001 The Main Themes of Microbiology Multiple Choice Questions 1. When humans manipulate the genes of microorganisms the process is called A. Bioremediation B. Genetic engineering C. Epidemiology D. Immunology E. Taxonomy 2. Which of the following is not considered a microorganism? A. Mosquito B. Protozoa C. Bacteria D. Viruses E. Fungi 3. All microorganisms are best defined as organisms that A. Cause human disease B. Lack a cell nucleus C. Are infectious particles D. Ar...

Chapter 01 - The Air We Breathe Multiple Choice Questions 1. Of five major gaseous components of air, which is the only one to vary significantly in concentration from place to place and from day to day? A. water vapor B. carbon dioxide C. nitrogen D. argon 2. Which two gases make up more than 95% of an inhaled breath? A. NO2 and N2 B. CO2 and O2 C. O2 and N2 D. N2 and Ar 3. What is the primary component of an exhaled breath? A. N2 B. O2 C. CO2 D. H2O

Chemistry: A Molecular Approach, 3e (Tro) Chapter 1 Matter, Measurement, and Problem Solving Multiple Choice Questions 1) Molecules can be described as A) mixtures of two or more pure substances. B) mixtures of two or more elements that has a specific ratio between components. C) two or more atoms chemically joined together. D) heterogeneous mixtures. E) homogeneous mixtures. Answer: C Diff: 1 Page Ref: 1.1 2) Give the composition of water. A) two hydrogen atoms and two oxygen atoms ...

Chemistry: Structure and Properties (Tro) Chapter 1 Atoms 1.1 Multiple Choice Questions 1) An element has three stable isotopes with masses of 27.977 amu, 28.976 amu, and 29.973 amu. The heavier two isotopes have an abundance of 4.68% and 3.09%, respectively. What is the mass of the element? A) 27.684 amu B) 29.251 amu C) 28.085 amu D) 30.107 amu E) 28.991 amu Answer: C Diff: 5 Var: 1 Page Ref: 1.9 LO: 1.6 2) All of the following will lead to a homogeneous mixture except A) sugar ...