Introductory Chemistry: An Active Learning Approach
6th Edition
ISBN: 9781305079250
Author: Mark S. Cracolice, Ed Peters
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 23E
Which of the following are pure substances and which are mixtures: (a) table salt; (b) tap water; (c) clean, dry air; (d) steam.
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Chapter 2 Solutions
Introductory Chemistry: An Active Learning Approach
Ch. 2 - Consider the photograph and illustrations of table...Ch. 2 - In the left box, draw a particulate-level...Ch. 2 - Classify the following changes as chemical C or...Ch. 2 - Specific gravity is a physical property. Beakers...Ch. 2 - Classify the following as homogenous or...Ch. 2 - Table salt from the beaker on the left in the...Ch. 2 - Which of the following are compounds, and which...Ch. 2 - Prob. 2.8TCCh. 2 - Identify the net electrical force-attraction,...Ch. 2 - aIs the process of boiling water exothermic or...
Ch. 2 - In everyday language, the term conserve usually...Ch. 2 - Write a brief description of the relationships...Ch. 2 - Write a brief description of the relationships...Ch. 2 - Prob. 3CLECh. 2 - Write a brief description of the relationships...Ch. 2 - Prob. 5CLECh. 2 - Prob. 6CLECh. 2 - Prob. 1ECh. 2 - Classify each of the following as macroscopic,...Ch. 2 - Suggest a reason for studying matter at the...Ch. 2 - How does a chemist think about particles that are...Ch. 2 - Using spheres to represent individual atoms,...Ch. 2 - Describe a piece of ice at the particulate level....Ch. 2 - 7.The word pour is commonly used in reference to...Ch. 2 - Prob. 8ECh. 2 - Which of the three states of matter is most easily...Ch. 2 - Compare the volumes occupied by the same sample of...Ch. 2 - Classify each of the following properties as...Ch. 2 - Classify the italicized property as chemical or...Ch. 2 - Which among the following are physical changes? a...Ch. 2 - Classify each of the following changes as chemical...Ch. 2 - Is the change illustrated below a physical change...Ch. 2 - Is the change in the illustration below a physical...Ch. 2 - Diamonds and graphite are two forms of carbon....Ch. 2 - Aspirin is a pure substance. If you had the choice...Ch. 2 - The substance in the glass below is from a kitchen...Ch. 2 - Are the contents of the bottle in the picture...Ch. 2 - Which of the following particulate illustrations...Ch. 2 - Which of the following particulate illustrations...Ch. 2 - Which of the following are pure substances and...Ch. 2 - Which of the substances below are pure and which...Ch. 2 - Apart from food, list five things in your home...Ch. 2 - Can the terms homogeneous and heterogeneous be...Ch. 2 - Which items in the following list are...Ch. 2 - Classify each of the following mixtures as either...Ch. 2 - Some ice cubes are homogeneous and some are...Ch. 2 - The freshly polished brass cylinder in the picture...Ch. 2 - Draw a particulate-level sketch of a heterogeneous...Ch. 2 - Draw a particulate-level sketch of a homogeneous...Ch. 2 - Suppose someone emptied ball bearings into a...Ch. 2 - Suggest at least two ways to separate ball...Ch. 2 - Prob. 35ECh. 2 - You receive a mixture of table salt and sand and...Ch. 2 - Classify the following as compounds or elements: a...Ch. 2 - Classify each of the following pure substances as...Ch. 2 - Which of the following are elements, and which are...Ch. 2 - Classify each of the following pure substances as...Ch. 2 - Classify each substance in the illustrations below...Ch. 2 - Does each of the particulate-level models below...Ch. 2 - a Which of the following substances would you...Ch. 2 - a Which of the following substances would you...Ch. 2 - Metal A dissolves in nitric acid solution. You can...Ch. 2 - A white, crystalline material that looks like...Ch. 2 - Questions 47 and 48: Samples of matter may be...Ch. 2 - Questions 47 and 48: Samples of matter may be...Ch. 2 - What is the main difference between electrostatic...Ch. 2 - Identify the net electrostatic force attraction,...Ch. 2 - Identify the reactants and products in the...Ch. 2 - In the following equation for a chemical reaction,...Ch. 2 - In the equation Ni+Cu(NO3)2Ni(NO3)2+Cu, which of...Ch. 2 - Write the formulas of the elements that are...Ch. 2 - Prob. 55ECh. 2 - Classify each of the following changes as...Ch. 2 - As a child plays on a swing, at what point in her...Ch. 2 - A bicycle accelerates from 5 miles per hour to 15...Ch. 2 - After solid limestone is heated, the rock that...Ch. 2 - Before electronic flashes were commonly used in...Ch. 2 - The photograph below shows a beaker of water and a...Ch. 2 - Prob. 62ECh. 2 - Prob. 63ECh. 2 - Prob. 64ECh. 2 - Distinguish precisely and in scientific terms the...Ch. 2 - Prob. 66ECh. 2 - A natural-food store advertises that no chemicals...Ch. 2 - Prob. 68ECh. 2 - Name some pure substances you have used today.Ch. 2 - How many homogeneous substances can you reach...Ch. 2 - Which of the following can be pure substances:...Ch. 2 - Can you have a mixture of two elements as well as...Ch. 2 - Can you have more than one compound made of the...Ch. 2 - Rainwater comes from the oceans. Is rainwater more...Ch. 2 - Prob. 75ECh. 2 - Prob. 76ECh. 2 - Consider the sample of matter in the illustration...Ch. 2 - A particulate-level illustration of the reaction...Ch. 2 - Prob. 79ECh. 2 - Prob. 80ECh. 2 - Prob. 81ECh. 2 - Prob. 82ECh. 2 - Particles in the illustration below undergo a...Ch. 2 - Prob. 84E
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- You receive a mixture of table salt and sand and have to separate the mixture into pure substances. Explain how you would carry out this task. Is your method based on physical or chemical properties? Explain.arrow_forwardThe following pairs of substances represent heterogeneous mixtures. For each pair, describe the steps you would follow to separate the components and collect them. Explain. (a) sugar and sand (b) iron filings and sand (c) sand soaked with oilarrow_forwardClassify each of the following as a pure substance, a solution,or a heterogeneous mixture: (a) a gold ingot, (b) a cup of coffee,(c) a wood plank.arrow_forward
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- The scenes below illustrate two different mixtures. When mixture A at 273 K is heated to 473 K, mixture B results.(a) How many different chemical changes occur?(b) How many different physical changes occur?arrow_forwardYou are given a hammer a battery, a bulb, wires and switch(a) How could you use them to distinguish between samples of metals and non metals?(b) Assess the usefulness of these tests to distinguish between metals and non-metalsarrow_forwardA group of students took turns using a laboratory balanceto weigh the water contained in a beaker. The results theyreported were 111.42 g, 111.67 g, 111.21 g, 135.64 g,111.02 g, 111.29 g, and 111.42 g.(a) Should any of the data be excluded before the average is calculated?(b) From the remaining measurements, calculate the average value of the mass of the water in the beaker.(c) Calculate the standard deviation s and, from it, the 95% confidence limit.arrow_forward
- 7. State whether each of the following represents a chemical change or merely a physical change:(a) A few grams of sucrose (table sugar) are placed in a small beaker of deionized water; the sugar crystals “disappear,” and the liquid in the beaker remains clear and colorless.(b) A copper statue, over time, turns green.(c) When a teaspoon of baking soda (sodium bicarbonate) is placed into a few ounces of vinegar (acetic acid), volumes of bubbles (effervescence) are produced.arrow_forwardIdentify the following samples of matter as macroscopic, microscopic, or particulate: (a) a human skin cell; (b) a sugar molecule; (c) a blade of grass; (d) a helium atom; (e) a singlecelled plant too small to see with the unaided eye.arrow_forwardClassify each property as physical or chemical. (a) the tendency of copper to turn green when exposed to air(b) the tendency of automobile paint to dull over time(c) the tendency of gasoline to evaporate quickly when spilled(d) the low mass (for a given volume) of aluminum relative to other metalsarrow_forward
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