Write true for the correct statements and false for the A physical change is a change in the composition of a subs A homogeneous mixture always contains only one phase. 3 Atoms combine chemically to form elements. 4 Two different substances can not have similar physical pro Acids, bases and salts are all compounds. 6. The properties of a substance that can be observed witho physical properties.- The ability of iron to conduct electricity is a chemical pro

Write true for the correct statements and false for the A physical change is a change in the composition of a subs A homogeneous mixture always contains only one phase. 3 Atoms combine chemically to form elements. 4 Two different substances can not have similar physical pro Acids, bases and salts are all compounds. 6. The properties of a substance that can be observed witho physical properties.- The ability of iron to conduct electricity is a chemical pro

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter3: Matter

Section: Chapter Questions

Problem 62CP

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Similar questions

Distinguish precisely and in scientific terms the differences among items in the following groups. a Macroscopic matter, microscopic matter, particulate matter b Physical change, physical property, chemical change, chemical property c Gases, liquids, solids d Element, compound e Atom, molecule f Pure substance, mixture g Homogeneous matter, heterogeneous matter h Reactant, product i Exothermic change, endothermic change j Potential energy, Kinetic energy
The boiling of water is a physical change because the water disappears. physical change because the gaseous water is chemically the same as the liquid. chemical change because heat is needed for the process to occur. chemical change because hydrogen and oxygen gases are formed from water. chemical and physical change. Explain your answer.
A 2.0-mer volume of hydrogen gas combined with 1.0 liter of oxygen gas to produce 2.0 liters of water vapor. Does oxygen undergo a chemical or physical change?
A solution made by dissolving sugar in water is homogeneous because the composition is the same everywhere. But if you could look with very high magnification, you would see locations with water particles and other locations with particles of sugar. How can we say that a sugar solution is homogenous?
¡n a sample of a gaseous substance, more than 99% of the overall volume of the sample is empty space. How is this fact reflected in the properties of a gaseous substance compared with the properties of a liquid or solid substance?
What properties distinguish solids from liquids? Liquids from gases? Solids from gases?
How do you distinguish (a) chemical properties from physical properties? (b) distillation from filtration? (c) a solute from a solution?
Physical and Chemical Changes Say you are presented with two beakers, beaker A and beaker B, each containing a white, powdery compound. a From your initial observations, you suspect that the two beakers contain the same compound. Describe, in general terms, some experiments in a laboratory that you could do to help prove or disprove that the beakers contain the same compound. b Would it be easier to prove that the compounds are the same or to prove that they are different? Explain your reasoning. c Which of the experiments that you listed above are the most convincing in determining whether the compounds are the same? Justify your answer. d A friend states that the best experiment for determining whether the compounds are the same is to see if they both dissolve in water. He proceeds to take 10.0 g of each compound and places them in separate beakers, each containing 100 mL of water. Both compounds completely dissolve. He then states, Since the same amount of both substances dissolved in the same volume of water, they must both have the same chemical composition. Is he justified in making this claim? Why or why not?
How does an element differ from a compound? How are they similar?
Consider the following experiments, and answer the questions pertaining to classification: a. A pure substance R is heated, cooled, put under pressure, and exposed to light but does not change into anything else. What can be said about classifying substance R as an element or a compound? Explain your reasoning. b. Upon heating, solid pure substance T gives off a gas and leaves another solid behind. What can be said about classifying substance T as an element or compound? Explain your reasoning c. What can be said about classifying the solid left in part b as an element or compound? Explain your reasoning.
How does a homogeneous mixture differ from a pure substance? How are they similar?
Which of (he following are true? P4 is considered a compound. Metal rusting on a car is a chemical change. Dissolving sugar in water is a chemical change. Sodium chloride (NaCl) is a homogeneous mixture.