Question 1

Indicate whether each of the following statements represents a chemical change, a physical change, or no change occurred.
-Candle wax is melted. ____________________

Accepted Answer

The answer of Indicate whether each of the following statements...

Question 2

Which of the following represents a physical change in matter?

Accepted Answer

A)   A substance melts when heated.
B)   A substance gives off a gas when heated.
C)   A substance burns when heated.
D)   A substance remains unchanged as it is heated.E) A) and C)
F) B) and D)

Question 3

Which statement is false?

Accepted Answer

A)   Different mixtures of the same two substances must have the same composition.
B)   A mixture of sea sand and table salt is an example of a heterogeneous mixture.
C)   An example of a homogeneous mixture is one prepared by mixing drinking alcohol and water.
D)   A compound is a substance that can be decomposed into two or more simpler substances by chemical means.E) B) and D)
F) None of the above

Question 4

Which answer includes all of the following that are chemical changes, and no physical changes?
I. The cutting of an iron bar into smaller pieces.
II. The solidification of mercury by cooling.
III. The dropping of iron into hydrochloric acid, producing hydrogen gas.
IV. The mixing of water and drinking alcohol.
V. The fermentation of grape juice.

Accepted Answer

A)   II, III, IV, and V
B)   III and V
C)   I, III, and IV
D)   I and IVE) A) and C)
F) B) and C)

Question 5

Molten iron metal has a(n)  ________ volume and a(n)  ________ shape.

Accepted Answer

A)   definite; definite
B)   indefinite; indefinite
C)   definite; indefinite
D)   indefinite; definiteE) C) and D)
F) A) and B)

Question 6

Which of the following is a compound?

Accepted Answer

A)   copper
B)   magnesium
C)   copper (II)  oxide
D)   ironE) None of the above
F) C) and D)

Question 7

Indicate whether the following descriptions of matter represents an
-Two substances present, two phases present. ____________________

Accepted Answer

A)   element
B)   mixture
C)   compoundD) None of the above
E) All of the above

Question 8

Which of these is an extensive property?

Accepted Answer

A)   density
B)   color
C)   mass
D)   melting pointE) B) and D)
F) A) and B)

Question 9

For each set of elements choose the appropriate characterization of the set's elemental symbols from the response list. Responses may be used more than once or need not be used at all.
-  neon, lithium, scandium

Accepted Answer

A)   all symbols have one letter
B)   all symbols have two letters
C)   all symbols start with the same letter
D)   all symbols start with a letter not the first letter of the element's English nameE) A) and B)
F) A) and C)

Question 10

Which of the following is a chemical change?

Accepted Answer

A)   distilling ocean water
B)   making tea from a tea bag
C)   rusting of iron
D)   melting of snowE) None of the above
F) B) and C)

Question 11

The condensation of steam is an example of a ________.

Accepted Answer

A)   change of state
B)   extensive property
C)   sublimation
D)   chemical changeE) B) and C)
F) A) and C)

Question 12

When a substance undergoes a chemical change it is always true that ________.

Accepted Answer

A)   it condenses
B)   it changes state
C)   new substances are formed
D)   heat is absorbedE) None of the above
F) A) and D)

Question 13

The most abundant elements in the universe are ________.

Accepted Answer

A)   oxygen and iron
B)   hydrogen and helium
C)   helium and carbon
D)   hydrogen and oxygenE) C) and D)
F) All of the above

Question 14

Indicate whether each of the following statements represents a chemical change, a physical change, or no change occurred.
-Sodium metal is cut with a knife. ____________________

Accepted Answer

The answer of Indicate whether each of the following statements...

Question 15

A pure substance A is found to change upon heating into two new, pure substances, B and C.
A  →\rightarrow→  B + C
Neither B nor C can be decomposed by chemical means. From this we may conclude that ________.

Accepted Answer

A)   A is an element, B and C are compounds
B)   B is a compound, A and C are elements
C)   B and C are elements, A is a compound
D)   A, B, and C are all compounds E) None of the above
F) A) and C)

Exam 4: Basic Concepts About Matter

When a substance undergoes a chemical change it is always true that ________.

Correct Answer
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Indicate whether the following descriptions of matter represents an -Two substances present, two phases present. ____________________

Correct Answer
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Correct Answer
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The condensation of steam is an example of a ________.

Correct Answer
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Indicate whether each of the following statements represents a chemical change, a physical change, or no change occurred. -Sodium metal is cut with a knife. ____________________

Correct Answer
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The most abundant elements in the universe are ________.

Correct Answer
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Which of the following is a chemical change?

Correct Answer
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Molten iron metal has a(n) volume and a(n) shape.

Correct Answer
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A pure substance A is found to change upon heating into two new, pure substances, B and C. A $\rightarrow$ B + C Neither B nor C can be decomposed by chemical means. From this we may conclude that ________.

Correct Answer
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Which of the following represents a physical change in matter?

Correct Answer
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Indicate whether each of the following statements represents a chemical change, a physical change, or no change occurred. -Candle wax is melted. ____________________

Correct Answer
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For each set of elements choose the appropriate characterization of the set's elemental symbols from the response list. Responses may be used more than once or need not be used at all. - neon, lithium, scandium

Correct Answer
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Which statement is false?

Correct Answer
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Which of the following is a compound?

Correct Answer
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Which of these is an extensive property?

Correct Answer
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Exam 4: Basic Concepts About Matter

When a substance undergoes a chemical change it is always true that ________.

Correct AnswerverifiedShow Answer

Indicate whether the following descriptions of matter represents an -Two substances present, two phases present. ____________________

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The condensation of steam is an example of a ________.

Correct AnswerverifiedShow Answer

Indicate whether each of the following statements represents a chemical change, a physical change, or no change occurred. -Sodium metal is cut with a knife. ____________________

Correct AnswerverifiedShow Answer

The most abundant elements in the universe are ________.

Correct AnswerverifiedShow Answer

Which of the following is a chemical change?

Correct AnswerverifiedShow Answer

Molten iron metal has a(n) ________ volume and a(n) ________ shape.

Correct AnswerverifiedShow Answer

A pure substance A is found to change upon heating into two new, pure substances, B and C. A →\rightarrow→ B + C Neither B nor C can be decomposed by chemical means. From this we may conclude that ________.

Correct AnswerverifiedShow Answer

Which of the following represents a physical change in matter?

Correct AnswerverifiedShow Answer

Indicate whether each of the following statements represents a chemical change, a physical change, or no change occurred. -Candle wax is melted. ____________________

Correct AnswerverifiedShow Answer

For each set of elements choose the appropriate characterization of the set's elemental symbols from the response list. Responses may be used more than once or need not be used at all. - neon, lithium, scandium

Correct AnswerverifiedShow Answer

Which statement is false?

Correct AnswerverifiedShow Answer

Which of the following is a compound?

Correct AnswerverifiedShow Answer

Which of these is an extensive property?

Correct AnswerverifiedShow Answer

Correct Answer
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Molten iron metal has a(n) volume and a(n) shape.

Correct Answer
verified

A pure substance A is found to change upon heating into two new, pure substances, B and C. A $\rightarrow$ B + C Neither B nor C can be decomposed by chemical means. From this we may conclude that ________.

Correct Answer
verified

Correct Answer
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Correct Answer
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