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Chemistry 1110 > Chptr 1 Quiz > Flashcards

Chptr 1 Quiz Flashcards

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1
Q

What are the two general characteristics that all types of matter possess?

A

Has Mass, occupies space?

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2
Q

What are the three aspects of matter that are of particular interest to chemists?

A

Characteristics, composition, transformations of matter.

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3
Q

Classify each of the following as matter or energy.
1. Air
2. Pizza
3. Sound
4. Gold

A
  1. Matter
  2. Matter
  3. Energy
  4. Matter
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4
Q

Classify each of the following as matter or energy.
1. Silver
2. Cake
3. Heat
4. Water

A
  1. Matter
  2. Matter
  3. Energy
  4. Matter
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5
Q

What physical characteristic distinguishes
1. liquids from solids
2. gases from liquids

A
  1. Indefinite shape vs definite shape
  2. Indefinite volume vs definite volume
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6
Q

What physical characteristic is the same for
1. Liquids and solids
2. Gases and liquids

A
  1. Definite volume
  2. Indefinite shape
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7
Q

Indicate whether each of the following substances does or does not take the shape of its container and also whether it has a definite volume.
1. Copper wire
2. Oxygen gas
3. Granulated sugar
4. Gasoline

A
  1. Does not, yes
  2. Does, no
  3. Does, yes
  4. Does, yes
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8
Q

Indicate whether each of the following substances does or does not take the shape of its container and also whether it has an indefinite volume
1. Aluminum powder
2. Carbon dioxide gas
3. Clean air
4. Gasoline

A
  1. Does, no
  2. Does, yes
  3. Does, yes
  4. Does, no
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9
Q

Classify each of the following properties of the metal magnesium as a physical property or a chemical property.
1. Solid at room temperature
2. Ignites upon heating and air
3. Hydrogen gas is produced when it dissolved in acids
4. Has a density of 1.738 g/cm^3 at 20° c

A
  1. Physical
  2. Chemical
  3. Chemical
  4. Physical
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10
Q

Classify each of the following properties of the metal magnesium as a physical property or a chemical property
1. Silvery white in color
2. Does not react with cold water
3. Melts at 651° c
4. Finely divided form burns in oxygen with a dazzling white flame

A
  1. Physical
  2. Chemical
  3. Physical
  4. Chemical
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11
Q

Indicate whether each of the following statements describes a physical or a chemical property
1. Silver salts discolor the skin by reacting with skin protein
2. Hemoglobin molecules have a red color
3. Beryllium metal vapor is extremely toxic to humans
4. Aspirin tablets can be pulverized with a hammer

A
  1. Chemical
  2. Physical
  3. Chemical
  4. Physical
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12
Q

Indicate whether each of the following statements describes a physical or a chemical property
1. Diamonds are a very hard substance
2. Gold medal does not react with nitric acid
3. Lithium metal is light enough to float on water
4. Mercury is a liquid at room temperature

A
  1. Physical
  2. Chemical
  3. Physical
  4. Physical
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13
Q

Classify each of the following observations about the behavior of a substance as a physical property or chemical property of the substance.
1. Does not react with oxygen at 50° c
2. Reacts explosively with oxygen at 425° c
3. Does not melt when heated to 100° c
4. Melts at temperatures that exceed 250° c

A
  1. Chemical
  2. Chemical
  3. Physical
  4. Physical
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14
Q

The freezing over of a pond surface is a_______ process.

A

Physical

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15
Q

True or false?
All heterogeneous mixtures must contain three or more substances

A

False

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16
Q

True or false pure substances cannot have a variable composition

A

True

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17
Q

True or false?
Substances maintain their identity in a heterogeneous mixture, but not in a homogeneous mixture

A

False

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18
Q

True or false?
Pure substances are seldom encountered in the everyday world

A

True

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19
Q

Which category has two substances present, two phases present?

A

Heterogeneous mixture

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20
Q

Which category of matter has two substances present, one phase present?

A

Homogeneous mixture

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21
Q

Which category of matter has one substance present, two phases present?

A

Pure substance

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22
Q

Which category of matter has three substances present, three phases present?

A

Heterogeneous mixture

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23
Q

Classify water and dissolved salt as a heterogeneous mixture, homogeneous mixture, or a pure substance. Also indicate how many phases are present, assuming all components are present in the same container.

A

Homogeneous mixture, one phase

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24
Q

Classify water and sand as a heterogeneous mixture, homogeneous mixture, or a pure substance. Also indicate how many phases are present, assuming all components are present in the same container.

A

Heterogeneous mixture, two phases

25
Q

Classify water, ice, and oil as a heterogeneous mixture, homogeneous mixture, or a pure substance. Also indicate how many phases are present, assuming all components are present in the same container.

A

Heterogeneous mixture, three phases

26
Q

Classify water and dissolved sugar, and undissolved sugar as a heterogeneous mixture, homogeneous mixture, or a pure substance. Also indicate how many phases are present, assuming all components are present in the same container.

A

Heterogeneous mixture, two phases

27
Q

What is a phase?

A

Different components of a mixture

28
Q

Is the example an element, compound, or no such classification?
Analysis with an elaborate instrument indicates the substance A contains two elements

A

Compound

29
Q

Is the example an element, compound, or no such classification is possible because of insufficient data?
Substance B decomposes upon heating

A

Compound

30
Q

Is the example an element, compound, or no such classification is possible because of insufficient data?
Heating substance C to 1000° c causes no change in it

A

No such classification as possible because of insufficient data

31
Q

Is the example an element, compound, or no such classification is possible because of insufficient data?
Heating substance D to 500° c. Causes it to change from a solid to a liquid

A

No such classification is possible because of insufficient data

32
Q

Is the example an element, compound, or no such classification is possible because of insufficient data?
Substance A cannot be broken down into simpler substances by chemical means

A

Element

33
Q

Based on the formula, classify each as either a pure substance, element or compound, or indicate that no such classification is possible because of insufficient information
A+B=C. D=E+F+G

A

A, B, E, F, G-classification not possible
C, D- compound

34
Q

True or false?
Both elements and compounds are pure substances?

A

True

35
Q

True or false?
A compound results from the physical combination of two or more elements?

A

False. It is a chemical combination, not physical

36
Q

True or false?
In order for matter to be heterogeneous, at least two compounds must be present

A

False, it just needs to be two or more elements

37
Q

True or false
Compounds, but not elements, can have a variable composition?

A

False
Because compounds are chemically bonded, if you were to change the composition it would change the compound

38
Q

Consider two boxes with the following contents: The first contains 30 bolts and 30 nuts that fit the bolts; the second contains the same number of nuts and bolts with the difference that each bolt has the nut screwed on it. Which box has contents that would be an analogy for a mixture, and which box has contents that would be an analogy for a compound?

A

The first box would be a mixture.
The second box would be a compound.

39
Q

Is the following an element, compound, or mixture?
One substance present, three elements present

A

Compound

40
Q

Is the following an element, compound, or mixture?
Two substances present, one phase present

A

Mixture

41
Q

Is the following an element, compound, or mixture?
One substance present, one phase present, substance cannot be decomposed using chemical means

A

Element

42
Q

Is the following an element, compound, or mixture?
Two elements present, composition is variable

A

Mixture

43
Q

Is the following an example of a heterogeneous mixture, a homogeneous mixture, a compound, or an element?
A blue colored, single phase liquid that when boiled away or evaporated leaves behind a solid residue.

A

Homogeneous Mixture

44
Q

Is the following an example of a heterogeneous mixture, a homogeneous mixture, a compound, or an element?
A cloudy liquid that separates into two layers upon standing overnight

A

Heterogeneous mixture

45
Q

Is the following an example of a heterogeneous mixture, a homogeneous mixture, a compound, or an element?
A non-uniform, white crystalline substance, part of which dissolves in alcohol and part of which does not dissolve an alcohol

A

Heterogeneous mixture

46
Q

Is the following an example of a heterogeneous mixture, a homogeneous mixture, a compound, or an element?
A colorless gas that cannot be separated into simpler substances using physical means and that reacts with the metal magnesium to produce both a magnesium oxygen compound and a magnesium nitrogen compound.

A

Compound

47
Q

True or false?
A mixture containing copper and sulfur can have a variable composition

A

True

48
Q

True or false
In a mixture of copper and sulfur, the two elements maintain their individual properties.

A

True

49
Q

True or false?
In a compound containing copper and sulfur, physical methods can be used to separate the substances present.

A

False

50
Q

True or false?
In a compound containing copper and sulfur, the two elements are chemically combined rather than physically combined.

A

True

51
Q

True or false?
Elements that do not occur in nature have been produced in a laboratory setting

A

True

52
Q

True or false?
At present, 108 elements are known

A

False

53
Q

True or false?
Current chemical theory suggests there are more naturally occurring elements yet to be discovered

A

False

54
Q

True or false?
More laboratory produced elements exist then naturally occurring elements

A

False

55
Q

True or false? The majority of the known elements have been discovered since 1990

A

True

56
Q

True or false new naturally occurring elements have been identified within the past 10 years

A

False

57
Q

True or false?
More than 25 laboratory produced elements are known

A

True

58
Q

True or false?
All laboratory produced elements are unstable

A

True

59
Q

True or false
Silicone is the second most abundant element in Earth’s crust

A

True

Chemistry 1110 (4 decks)

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