Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Textbook Question
Chapter 1, Problem 29E
Classify each of the following changes as physical or chemical:
a. the crushing of salt
b. the rusting of iron
c. the burning of natural gas in a stove
d. the vaporization of gasoline
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Chapter 1 Solutions
Chemistry In Focus
Ch. 1 - A chemist observes the behavior of a gas by...Ch. 1 - Classifying Matter Determine whether each of the...Ch. 1 - A cup of coffee is an example of: a. a liquid pure...Ch. 1 - Water is put on the stove and heated with a...Ch. 1 - The Conservation of Mass A match is weighed and...Ch. 1 - Constant Composition of Compounds Two samples of...Ch. 1 - Prob. 4SCCh. 1 - What is meant by the statement Macroscopic...Ch. 1 - Why should nonscience majors study science?Ch. 1 - Prob. 3E
Ch. 1 - Define chemistry.Ch. 1 - Prob. 5ECh. 1 - Prob. 6ECh. 1 - How are science and art similar? How are they...Ch. 1 - What is different about the Greek philosophers...Ch. 1 - Match each of the people in column A with their...Ch. 1 - What were the two main pursuits of alchemy? What...Ch. 1 - Prob. 11ECh. 1 - What is the difference between an element and a...Ch. 1 - What is the difference between a pure substance...Ch. 1 - What is the difference between a homogeneous...Ch. 1 - Explain the differences among a solid, a liquid,...Ch. 1 - Match each term in the left column with three...Ch. 1 - What is the atomic theory?Ch. 1 - Describe Rutherfords gold foil experiment.Ch. 1 - Describe the structure of the atom as explained by...Ch. 1 - What are black holes, and how does their existence...Ch. 1 - Classify each of the following as an observation...Ch. 1 - Classify each of the following as a law or a...Ch. 1 - To the best of your knowledge, classify each of...Ch. 1 - To the best of your knowledge, classify each of...Ch. 1 - Which substance is a liquid mixture? a. lemonade...Ch. 1 - Which substance is a solid? a. the helium in a...Ch. 1 - Classify each of the following properties as...Ch. 1 - Classify each of the following properties as...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - The burning of gasoline in automobile engines is a...Ch. 1 - A campfire is a chemical reaction involving wood...Ch. 1 - Prob. 33ECh. 1 - Prob. 34ECh. 1 - A chemist combines 22 grams of sodium with 28...Ch. 1 - A chemist combines 6 grams of hydrogen with 52...Ch. 1 - Several samples of carbon dioxide are obtained and...Ch. 1 - Several samples of methane gas, the primary...Ch. 1 - According to Rutherfords model of the atom, how...Ch. 1 - According to Rutherfords model of the atom, how...Ch. 1 - When water boils, small bubbles form in the...Ch. 1 - Prob. 42ECh. 1 - Prob. 43ECh. 1 - Prob. 44ECh. 1 - Prob. 45ECh. 1 - The nuclei of a limited number of atoms are...Ch. 1 - Prob. 47ECh. 1 - Based on the molecular views shown for each of the...Ch. 1 - Read The Molecular Revolution" box in this chapter...
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- Water is put on the stove and heated with a natural gas burner. After some time, the water begins to bubble, and steam is given off. What kind of change has occurred? a. physical b. chemical c. no change has occurredarrow_forwardA hot metal block is plunged into water in a well-insulated container. The temperature of the metal block goes down, and the temperature of the water goes up until their temperatures are the same. A total of 1500 J of energy' is lost by the metal object. By how much did the energy of the water increase? What law of science is illustrated by this problem?arrow_forwardaIs the process of boiling water exothermic or endothermic with respect to the water? bA charged object is moved closer to another object that has the same charge. The energy of the system changes. Is it a change in kinetic energy or potential energy? Is the energy changes an increase or a decrease?arrow_forward
- In Figure 1.5 you see macroscopic and particulate views of the element bromine. Which are the macroscopic views and which are the particulate views? Describe how the particulate views explain properties of this element related to the state of matter.arrow_forwardClassify each process as a chemical or physical change. a. dissolving calcium chloride in water b. burning gasoline to power a car c. heating wax so that it meltsarrow_forwardClassify each as a physical change or a chemical change.a. breaking a pencil in twob. water freezing and forming icec. frying an eggd. burning woode. leaves changing colors in the fallarrow_forward
- A Classify each example as a physical change or a chemical change.a. crushing an aluminum canb. recycling used aluminum cans to make new aluminum cansc. aluminum combining with oxygen to form aluminum oxide.arrow_forwardDuring a chemical change: A. Chemical composition changes B. There is only a physical state change C. There are no changes D. Solids are always formedarrow_forwardWhich of the following is a chemical change? A. Burning paper B. dropping glass C. Dissolving salt in water D. Melting iron E. Mixing gold silver and copper to make a ringarrow_forward
- 1. The following are properties of the metal aluminum. Classify them as physical or chemical It generates a colorless, odorless gas when added to sulfuric acid. b. It can easily be formed into thin foils. It is a solid at room temperature. d. It is a good conductor of heat. a. C. 2. Classify each of the following changes as physical or chemical. a. Crushing a dry leaf b. Hammering a metal into a thin sheet C. Burning your chemistry textbook d. Melting an ice cubearrow_forwardClassify each of the following as a physical or chemical change:a. Silver metal is melted and poured into a mold to make a ring.b. Methane, in natural gas, burns in air.c. Potassium reacts spontaneously with water to form hydrogen gas.arrow_forwardClassify the following as physical or chemical changes. a.Moth balls gradually vaporize in a closet. b.Hydrofluoric acid attacks glass and is used to etch calibra- tion marks on glass laboratory utensils. c. A French chef making a sauce with brandy is able to boil off the alcohol from the brandy, leaving just the brandy flavoring. d. Chemistry majors sometimes get holes in the cotton jeans they wear to lab because of acid spillsarrow_forward
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