Introductory Chemistry: An Active Learning Approach
6th Edition
ISBN: 9781305079250
Author: Mark S. Cracolice, Ed Peters
Publisher: Cengage Learning
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Chapter 2, Problem 19E
The substance in the glass below is from a kitchen tap. Is it a pure substance or a mixture? What if it came from a bottle of distilled water?
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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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- A substance X is solid at 25°C. When heated to about 250°C it gradually liquefied. When cooled back to 25°C the liquid could not be induced to solidify. Is substance X probably an element, a compound, or a mixture? Explain your answer.arrow_forwardThere are four sketches below. The first sketch shows a sample of Substance X. The three sketches underneath it show three different changes to the sample. You must decide whether each of these changes is possible. If a change is possible, you must also decide whether it is a physical change or a chemical change.arrow_forwardWhile creating a piece of art work, a student becomes curious about the ink he is using to create his art. He wonders if the in is a pure substance or a mixture. The ink appears to be uniform throughout, but separates when a chromatography experimer is performed on it, leaving multiple marks of different colors along the chromatography paper. Using his observations of the properties of the ink, the student can classify it as a heterogeneous mixture. solution. compound. element.arrow_forward
- Suppose you accidentally drop a glass bowl full of sugar onto the floor, causing the bowl to shatter into pieces. Which of the procedures would be the most effective way to separate the sugar from the tiny pieces of glass? Collect all of the sugar and glass pieces into a pot and heat the mixture to melt the sugar. Then, pour the liquid sugar through a filter to separate the glass from the sugar. Collect all of the sugar and glass pieces into a bucket of water. Allow the water to dissolve the sugar, then remove the water and sugar solution, leaving the glass behind in the bucket. The solution is then heated to evaporate the water, leaving the sugar behind. Use a magnifying glass and tweezers to safely remove the glass particles from the mixture. Sweep a magnet across the spill to attract the glass particles and remove them from the mixture.arrow_forwardClassify substance as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound. If it is a mixture, classify it as homogeneous or heterogeneous. ALUMINIUMarrow_forwardMilk is homogeneous mixture and not a compound. Explain this statement.arrow_forward
- I have chosen to discuss the terms heterogeneous and homogeneous for this week's discussion. I have some familiarity with these two words and most of my familiarity is in terms of cooking. There are a lot of examples of heterogeneous and homogeneous mixtures in the kitchen. A heterogenous mixture is one made up of multiple individual components, like a chocolate chip cookie or a bowl of cereal and milk. While the ingredients are blended together, they are still visibly separate. A homogeneous mixture is one that blends to the point of no individual components being visible. An example of this could be simple syrup or a pitcher of sweet tea or lemonade. The terms heterogeneous and homogeneous refer to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree to which the materials are mixed together and the uniformity of their composition….just like as in the everyday usage of these terms. I feel like the similarities in the usage of…arrow_forwardAre the magnesium sulfate (MgSO4) and the sodium carbonate (NaCO3) still pure substances after you add water to them? What should we call this new combination of substances?arrow_forwardC4H10(butane, gas used in lighters) Express your answer as a chemical equation. Identify all of the phases in your answer. C2H6O (ethyl alcohol, liquid used in gasohol and as race car fuel) Express your answer as a chemical equation. Identify all of the phases in your answer C8H18 (octane, liquid, a component of gasoline) Express your answer as a chemical equation. Identify all of the phases in your answer.arrow_forward
- 7. Ryan wants to compare the chemical properties of two substances. In doing it, he prepared two flasks containing the substances and labeled them Liquid A and Liquid B. He monitore the boiling points of the liquids and found that the boiling points were 100°C for substance A and 110 C - 112°C for liquid B. How would you classify the two liquids? A. Liquid A is pure substance while Liquid B is a mixture. B. Liquids A and B contain two or more atoms that are chemically bonded. C. Liquid A has varying boiling points while liquid B has a fix boiling point. D. Liquid A maybe homogenous or heterogeneous but substance B is not. For item number 8, two liquids were observed and heated. The data gathered is shown in the table below. Temperature ('C) At start of boiling After 30 sec Liquid A Liquid B 80 100 100 85 After 60 sec After 90 sec 100 84 100 86 8. Based on the table above, which of the following is TRUE about Liquid A? A. It has a fixed boiling point. B. It is heterogeneous. 9. Angelica…arrow_forwardIf the combination of iron filings and sulfur in Question 25 is heated strongly, the iron reacts with the sulfur to form a solid that is no longer attracted by the magnet. Would this still represent a “mixture”? Why or why not?arrow_forwardsolution is a homogeneous mixture. Can you give an example of a gaseous homogeneous mixture? A liquid homogeneous mixture? A solid homogeneous mixture?arrow_forward
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