Answers. 1 The amount of matter that a material has is its ___. B mass A C D volume density...
-
Upload
meagan-rose -
Category
Documents
-
view
218 -
download
0
Transcript of Answers. 1 The amount of matter that a material has is its ___. B mass A C D volume density...
Answers
1 The amount of matter that a material has is its ___.
B mass
A
C
D
volume
density
composition
2 Lithium reacts with oxygen to produce lithium oxide. The product in this reaction is ___.
C
A
B
lithium
oxygen
lithium oxide
3 Which of the following is not a pure substance?
C Salt water
A
B
CO2
He
D H2O
4 Which of the following is a mixture?
A
B
C
Air
Aspirin
Tacos
D All of the above are mixtures
5 Which of the following is a heterogeneous mixture?
A Trail mix
B
C
Soda
Orange juice (no pulp)
D Vanilla ice cream
6 How many phases are in a homogeneous mixture?
A 1 only
B
C
2 only
2 or more
7 Which of the following is a compound?
B BH3
A
C
H-1
Ca2+
D Hg
8 The variable that is changed in an experiment is the ___.
B independent variable
A
C
control
dependent variable
D hypothesis
9 A concise statement that summarizes numerous observations is a(n) ___.
C scientific law
A
B
hypothesis
scientific theory
D observation
10 Which of the following is not a physical property of hydrogen?
C It combines with oxygen to produce water.
A
B
It is a gas at room temp.
It has a density of 0.89 g/mL.
D It has no color.
11 What state of matter has an indefinite shape and indefinite volume?
C
A
B
Solid
Liquid
Gas
12 What of the following is a physical change?
C Evaporation
A
B
Burning
Rusting
D Explosion
13 The statement “the pressure of a gas increases with decreasing volume because there are more collisions between particles” is a ___.
B scientific theory
A
C
scientific law
hypothesis
D experiment
14 Which of the following is not a physical change?
B cooking a hamburger
A
C
melting butter
freezing water
D peeling an orange
15 Lithium metal reacts with water to produce lithium oxide. Is this a physical or chemical change?
B
A physical
chemical
16 Which statement about compounds is true?
C Compounds have a fixed composition
A
B
Compounds can be separated by physical meansCompounds consist of more than 1 phase
D All of the above are true
17 Which statement about mixtures is true?
A
B
C
Mixtures can consist of one phase or more than 1 phaseMixtures can be separated by physical meansIn a mixture, properties of the individual parts are maintained
D All of the above are true
18What is one difference between a mixture and a compound?
B A compound can only be separated by chemical means
A
C
A compound consists of more than one phase
A mixture can only be formed by chemical means
D A mixture must be uniform in composition
19What is the best way to check that a chemical reaction has occurred?
C See if the chemical composition changed
A
B
See if a gas was produced
D See if the color changed
See if light/energy was produced
20What happens to matter in a chemical reaction?
A It is conserved. You get out what you put in.
B
C Matter is gained.
Matter is lost.
21 What is an intensive property of iron?
A
B
C
Its color
Its hardness
Its magnetism
D All of the above are intensive properties
22 How would you describe the following picture?
A heterogeneous mixture of gas molecules
23 What do chemical symbols and formulas represent, respectively
B Elements and compounds
A
C
Compounds and mixtures
Elements and ions
D Elements and mixtures
24 What state of matter expands when it is heated and is easy to compress?
C Gas
A
B
Solid
Liquid
25 Two features that define matter are _____.
C Mass and volume
A
B
Weight and volume
Mass and velocity
D Weight and velocity
26A substance that can be changed into simpler substances by chemical
means is a ______.
A
B
C
Product
Mixture
Element
D Compound
27The substance produced in a chemical reaction is called a(n) ______.
A product
B
C catalyst
reactant
D excess reagent
Indicate whether the following are physical (P) or chemical (C) properties of
sulfur 28 Sulfur is a solid at room temp
Sulfur is a poor conductor of electricity
Sulfur combines with oxygen to produce sulfur dioxide
29
30
P
C
P
Indicate whether the following are physical (P) or chemical (C) changes
31 Pizza is cut into slices
Aluminum and iodine react to produce aluminum iodide
Water is boiled32
33
P
P
C
Indicate whether the following are heterogeneous (HT) or homogeneous
(HM) mixtures
34 Blueberry muffin
Orange juice with extra pulp
Blood35
36
HT
HM
HT
Indicate whether the following are mixtures (M), elements (E) or
compounds (C)
37 Propane (C3H8)
Ice cream
Gold38
39
C
E
M
What is one unique physical property of iron that allows it to be easily separated from a mixture?
40
Iron is magnetic