Chptr 1 Quiz

Question 1

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

Answer 1

Has Mass, occupies space?

Question 2

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

Answer 2

Characteristics, composition, transformations of matter.

Question 3

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

Answer 3

1. Matter
2. Matter
3. Energy
4. Matter

Question 4

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

Answer 4

1. Matter
2. Matter
3. Energy
4. Matter

Question 5

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

Answer 5

1. Indefinite shape vs definite shape
2. Indefinite volume vs definite volume

Question 6

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

Answer 6

1. Definite volume
2. Indefinite shape

Question 7

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

Answer 7

1. Does not, yes
2. Does, no
3. Does, yes
4. Does, yes

Question 8

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

Answer 8

1. Does, no
2. Does, yes
3. Does, yes
4. Does, no

Question 9

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

Answer 9

1. Physical
2. Chemical
3. Chemical
4. Physical

Question 10

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

Answer 10

1. Physical
2. Chemical
3. Physical
4. Chemical

Question 11

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

Answer 11

1. Chemical
2. Physical
3. Chemical
4. Physical

Question 12

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

Answer 12

1. Physical
2. Chemical
3. Physical
4. Physical

Question 13

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

Answer 13

1. Chemical
2. Chemical
3. Physical
4. Physical

Question 14

The freezing over of a pond surface is a_______ process.

Answer 14

Physical

Question 15

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

Answer 15

False

Question 16

True or false pure substances cannot have a variable composition

Answer 16

True

Question 17

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

Answer 17

False

Question 18

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

Answer 18

True

Question 19

Which category has two substances present, two phases present?

Answer 19

Heterogeneous mixture

Question 20

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

Answer 20

Homogeneous mixture

Question 21

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

Answer 21

Pure substance

Question 22

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

Answer 22

Heterogeneous mixture

Question 23

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.

Answer 23

Homogeneous mixture, one phase

Question 24

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.

Answer 24

Heterogeneous mixture, two phases

Question 25

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.

Answer 25

Heterogeneous mixture, three phases

Question 26

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.

Answer 26

Heterogeneous mixture, two phases

Question 27

What is a phase?

Answer 27

Different components of a mixture

Question 28

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

Answer 28

Compound

Question 29

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

Answer 29

Compound

Question 30

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

Answer 30

No such classification as possible because of insufficient data

Question 31

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

Answer 31

No such classification is possible because of insufficient data

Question 32

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

Answer 32

Element

Question 33

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

Answer 33

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

Question 34

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

Answer 34

True

Question 35

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

Answer 35

False. It is a chemical combination, not physical

Question 36

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

Answer 36

False, it just needs to be two or more elements

Question 37

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

Answer 37

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

Question 38

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?

Answer 38

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

Question 39

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

Answer 39

Compound

Question 40

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

Answer 40

Mixture

Question 41

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

Answer 41

Element

Question 42

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

Answer 42

Mixture

Question 43

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.

Answer 43

Homogeneous Mixture

Question 44

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

Answer 44

Heterogeneous mixture

Question 45

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

Answer 45

Heterogeneous mixture

Question 46

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.

Answer 46

Compound

Question 47

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

Answer 47

True

Question 48

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

Answer 48

True

Question 49

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

Answer 49

False

Question 50

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

Answer 50

True

Question 51

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

Answer 51

True

Question 52

True or false? At present, 108 elements are known

Answer 52

False

Question 53

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

Answer 53

False

Question 54

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

Answer 54

False

Question 55

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

Answer 55

True

Question 56

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

Answer 56

False

Question 57

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

Answer 57

True

Question 58

True or false? All laboratory produced elements are unstable

Answer 58

True

Question 59

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

Answer 59

True