Unit 2b test What is matter? Matching



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Unit 2b test - What is matter?
Matching

Match each item with the correct statement below.

a.

mixture

d.

vapor

b.

product

e.

heterogeneous mixture

c.

phase




C 1. part of a sample having uniform composition and properties
E 2. not uniform in composition
B 3. a substance formed in a chemical reaction
D 4. gaseous state of substance that is a liquid or solid at room temperature
A 5. a physical blend of two or more components


Match each item with the correct statement below.

a.

distillation

d.

compound

b.

mass

e.

homogeneous

c.

element




A 6. a process in which a liquid is boiled to produce a vapor that is condensed again into a liquid
E 7. describes mixture with a uniform composition
B 8. amount of matter an object contains
D 9. composed of two or more substances chemically combined in a fixed proportion
C10. substance that cannot be changed into simpler substances by chemical means


Multiple Choice

Identify the choice that best completes the statement or answers the question.

11. Which of the following is NOT an example of matter?

a. water vapor b. air c. heat d. smoke


12. All of the following changes to a metal are physical changes EXCEPT ____.

a. rusting b. polishing c. bending d. melting
13. An example of an extensive property of matter is ____.
a. mass b. temperature c. hardness d. pressure
14. Which of the following is a chemical property of water at 4C?

a. its temperature b. its state c. its color d. its ability to decompose into hydrogen and oxygen


15. All of the following are physical properties of matter EXCEPT ____.

a. melting point b. ability to rust c. mass d. color


16. Which of the following CANNOT be classified as a substance?

a. nitrogen b. gold c. air d. table salt


17. A substance that forms a vapor is generally in what physical state at room temperature?

a. liquid b. solid c. gas d. liquid or solid


18. If a student heats 5 grams of a blue compound... and the PRODUCTS are 3 grams of a white compound and an unknown amount of a gas, how many grams of gas were produced? ____.

a. 15 b. 8 c. 2 d. 5


19. Which state of matter is characterized by having a definite shape and a definite volume?

a. solid b. liquid c. gas d. all of the above
20. What would be the total mass of the products of a reaction in which 10 grams of water was chemically changed into the elements hydrogen and oxygen?

a. 10 grams b. Not enough information c. 0 grams d. 5 grams
21. Which state of matter expands when heated and is easy to compress?

a. liquid b. solid c. gas d. all of the above


22. Which of the following is true for all chemical reactions?

a. The total mass of the reactants increases. b. The total mass of the reactants equals the total mass of the products. c. The total mass of the products is less than the total mass of the reactants. d. The total mass of the products is greater than the total mass of the reactants.


23. Which state of matter takes both the shape and volume of its container?
a. solid b. liquid c. gas d. both b and c
24. When an iron nail is ground into powder, its mass ____.

a. increases b. decreases c. stays the same d. cannot be determined


25. Which of the following represents a compound?

a. H b. H-3 c. H2O d. O-16


26. Which of the following is NOT a physical property of water?

a. It is a colorless liquid. b. It has a boiling point of 100C. c. Sugar dissolves in it. d. It is composed of hydrogen and oxygen.


27. Which of the following is a homogeneous mixture?

a. salt water b. soil c. sand and water d. beef stew
28. Which of the following CANNOT be considered a single phase?

a. a homogeneous mixture b. a heterogeneous mixture c. a pure liquid d. a pure solid


29. The first figure in a properly written chemical symbol always is ____.

a. capitalized b. underlined c. italicized d. boldfaced
30. What do chemical symbols and formulas represent?

a. elements and ions b. elements and compounds c. atoms and mixtures d. compounds and mixtures


31. What must be done to be certain that a chemical change has taken place?

a. Demonstrate that a release of energy occurred after the change. b. Check for the production of bubbles before and after the change. c. Check the composition of the sample before and after the change. d. Demonstrate that energy was absorbed by the reactants after the change.


32. Which of the following is true about compounds?

a. They have properties similar to those of their component elements. b. They have compositions that vary. c. They can be physically separated into their component elements. d. They are substances.


33. Which of the following does NOT involve a physical change?

a. mixing b. grinding c. decomposing d. melting


34. In the chemical reaction in which sucrose (TABLE SUGAR) is heated and decomposes to form carbon dioxide and water, which of the following is a reactant?

a. water b. carbon dioxide c. sucrose d. heat


35. The chemical symbol for iron is ____.

a. FE b. Fe c. fe d. Ir


36. What happens to matter during a chemical reaction?

a. Some matter is destroyed. b. Matter is neither destroyed or created. c. Some matter is destroyed and some is created. d. Some matter is created.


37. All of the following are physical properties of a substance in the liquid state EXCEPT ____.

a. definite mass b. not easily compressed c. indefinite volume d. indefinite shape


38. Which of the following is a chemical property?

a. color b. hardness c. freezing point d. ability to react with oxygen


39. Which of the following is true about homogeneous mixtures?

a. They are known as solutions. b. They are always liquids. c. They have compositions that never vary. d. They consist of two or more phases.


40. A substance that can be separated into two or more substances ONLY by a chemical change is a(n) ____.

a. element b. mixture c. solution d. compound


41. A vapor is which state of matter?

a. liquid b. solid c. gas d. all of the above


42. Which state of matter has a definite volume and takes the shape of its container?

a. solid b. liquid c. gas d. both b and c


43. What is one difference between a mixture and a compound?

a. A mixture must be uniform in composition. b. A mixture can only be separated into its components by chemical means. c. A compound can only be separated into its components by chemical means. d. A compound consists of more than one phase.


44. A golf ball has more mass than a tennis ball because it ____.

a. contains different kinds of matter b. contains more matter c. takes up more space d. has a definite composition


45. Which of the following is a physical change?

a. rotting of food b. explosion c. corrosion devaporation





PHYSICAL PROPERTIES TABLE

Substance

Color

Melting point (C)

Boiling Point(C)

Bromine

Red-brown

-7

59

Chlorine

Green-yellow

-101

-34

Ethanol

Colorless__-249__-246__Sulfur'>Colorless__-117__78__Mercury'>Colorless

-117

78

Mercury

Silvery-white

-39

357

Neon

Colorless

-249

-246

Sulfur

Yellow

115

445

Water

Colorless

0

100

USE THIS TABLE TO ANSWER QUESTIONS 46-50
46. Which substance is a solid at -8C?

a) Sulfur b) Water c) Bromine d) a, b, and c


47. Which substance has the lowest melting point?

a) Sulfur b) Ethanol c) Neon d) Chlorine

48. Which colorless substance is a liquid at 20C?

a) Neon b) Ethanol c) Water d) Both b and c

49. Which property is NOT useful when determining how to separate parts of a mixture:

a) Color b) Melting point c) Boiling point d) All are useful

50. If you had a mixture of bromine, water, and ethanol, and you were trying to separate this mixture… Which substance would become a gas first in the distillation process?

a) Water b) Ethanol c) Bromine d) Not enough information
Essay
51. Essential question: What is matter, how can you describe matter, and what are the ways that matter can be changed.
Matter is anything that has mass and takes us space. We’ve learned that matter can be defined as substances or as mixtures. Substances are either elements (our most basic substance with unique properties) or compounds, which are made up FROM elements. Compounds can be separated into elements ONLY by chemical means. Mixtures can be either homogeneous (also called solutions), which a mixture with only one phase (distinguishable part) or as heterogeneous. A heterogeneous mixture has 2 or more distinct phases, which can be separated by PHYSICAL MEANS.

Matter can be described with extensive properties (which refer to the amount of a substance) or with intensive properties (which refer to characteristics). Physical properties describe things you can OBSERVE about a substance with only physical changes (examples: melting point, boiling point, hardness, color) and chemical properties describe substances ability to do other things (Iron is able to react with oxygen, vinegar has the ability to react with baking soda, sulfuric acid has the ability to melt plastic).



Matter cannot be created or destroyed, but matter can be rearranged. In a chemical reaction, the mass of products and reactants remains the same (Law of conservation of mass) but the reactants are usually rearranged (Example: Water (as a reactant) decomposing into Hydrogen and Oxygen (products).

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