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Chemistry AP Final Exam

Total questions: 81

Worksheet time: 1hrs 17mins

Name
Class
Date
1.

What is the law of conservation of mass and how does it apply to chemical reactions?

a)

Mass is only conserved in physical reactions, not chemical reactions

b)

Mass is created in a chemical reaction and can be destroyed

c)

Mass is transformed into energy in a chemical reaction

d)

Mass is neither created nor destroyed in a chemical reaction, it is only transformed from one form to another.

2.

Describe the process of balancing a chemical equation.

a)

Changing the state of matter of the compounds

b)

Adjusting the coefficients of the compounds to ensure the same number of atoms of each element on both sides of the equation.

c)

Adding more compounds to the equation

d)

Removing some elements from the equation

3.

Which is an example of a chemical reaction?

a)

melting ice

b)

rusting iron

c)

water evaporating

d)

rubbing a maker on paper

4.

When smelling chemicals you should...

a)

smell directly

b)

waft it

c)

let the teacher smell it

d)

never smell it

5.

what is the first step of the scientific method?

a)

ask a question

b)

make an observation

c)

research

d)

write a hypothesis

6.

I am the variable that is controlled by the scientist in an experiment, which one am I?

a)

independent

b)

dependent

c)

control

d)

experimental

7.

I am the variable that is changed based on what happens to the independent variable, which one am I?

a)

dependent variable

b)

independent variable

c)

constant variable

d)

experimental variable

8.

Convert 300 centimeters to meters

a)

300 meters

b)

30 meters

c)

3 meters

d)

3000 meters

9.

What is the density of a rock with a mass of 600 grams and a volume of 2 Liters? (density = mass/volume)

a)

300 g/L

b)

1200 g/L

c)

600 g/L

d)

3 g/L

10.

In an experiment, what is the difference between the data and the conclusion?

a)

The data is the answer to the question, and the conclusion asks a new question

b)

The data is the observations, and the conclusion confirms or denies the hypothesis

c)

The data explains how to do the experiment, and the conclusion is the summary of the experiment

d)

The data supports the hypothesis, and the conclusion opposes the hypothesis

11.

What is the Law of Conservation of Mass?

a)

Matter is only created, never destroyed

b)

Matter is created more than it is destroyed

c)

Matter is not created nor destroyed

d)

Mass is created, matter is destroyed

12.

How many valence electrons does Chlorine have?

a)

2

b)

7

c)

17

d)

35

13.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

14.

__ Al + __ FeO → Al2O2 + __ Fe

a)

1, 1, 2

b)

2,1,2

c)

2, 2, 2

d)

2,4,2

15.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
16.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
17.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
18.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
19.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
20.
How many mountain bikes were sold?
a)
22
b)
28
c)
16
d)
6
21.
How many total people took the survey?
a)
50
b)
150
c)
100
d)
200
22.
A solution that can hold more solute  is called
a)
saturated
b)
supersaturated
c)
unsaturated
d)
insoluble
23.
Solvent is best defined as-
a)
a mixture in which the substances are spread out evenly between one another and cannot be told apart
b)
the ability of a substance to dissolve in another substance
c)
a substance that dissolves in another substance
d)
a substance into which another substance dissolves
24.
A solution that has more solute than it can hold is called
a)
saturated
b)
supersaturated
c)
unsaturated 
d)
suspension
25.
You can make a solution more concentrated by adding more __________.
a)
solute
b)
solvent
c)
water
26.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
27.
Which technique could increase or speed up the rate of dissolving?
a)
Allowing the mixture to settle
b)
Stirring the mixture
c)
Adding more powder
d)
Adding more water
28.
If we are making Kool-aid with sugar, Kool-aid powder, and water, which part is the solvent?
a)
water
b)
powder
c)
sugar
d)
powder and sugar
29.

This is a type of mixture where one substance dissolves into another

a)

Solution

b)

Miscibility

c)

Compound

d)

Solubility

30.
What type of mixture separates upon standing?
a)
Solution
b)
Alloy
c)
Colloid
d)
Suspension
31.
Which are different types of mixtures
a)
suspension
b)
solution
c)
colloid
d)
all the above
32.
What type of mixture contains liquids that normally don't mix well?
a)
colloid
b)
emulsion
c)
alloy
d)
solution
33.
Cookies and cream ice cream would be classified as
a)
A homogenous mixture
b)
A heterogenous mixture
c)
An element
d)
A compound
34.

Two substances have been combined physically and appear the same throughout is called a.........

a)

A homogeneous mixture

b)

A heterogeneous mixture

c)

An element

d)

A compound

35.
___________ is a combination of substances that can be physically separated. 
a)
Colloid 
b)
Mixture 
c)
Suspension 
d)
Compound 
36.
This type of mixture has particles that settle. 
a)
Suspension
b)
Colloid 
c)
Emulsion
d)
Solution 
37.

A feature of a colloid is that..

a)

they are cloudy

b)

they are transparent

c)

they are colourless

d)

they have a sediment

38.

What is the name of group number 1?

a)

halogens

b)

noble gases

c)

alkali metals

d)

alkaline earth metals

39.

What is the name of group number 1?

a)

halogens

b)

noble gases

c)

alkali metals

d)

alkaline earth metals

40.

where are the metaloids found

a)

far left, vertical

b)

stair step/diagonal

c)

far right horizontal

d)

at the bottom

41.

A row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

42.
___________ is the only metal that is a liquid at room temperature.
a)
Platinum
b)
Water
c)
Tin
d)
Mercury
43.

Nonmetals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

can be solid, liquids, or gases at room temperature.

44.

Moseley arranged what we know as the "modern periodic table". How did he arrange it?

a)

atomic mass

b)

atomic number

c)

valence electrons

d)

number of isotopes

45.
Each column in the periodic table is called a _________ .
a)
period
b)
group
c)
cluster
d)
unit
46.

Elements in the same group have : (2 correct answers)

a)

Similar chemical properties

b)

Similar names

c)

Same number of outer (valence) electrons)

d)

The same number of protons

47.
Which is an alkali metal?
a)
Magnesium
b)
Iron
c)
Sodium
d)
Europium
48.

The blue elements (left side) are called 

a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
49.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
50.

Which class of elements are malleable, ductile, shiny when clean and polished, good conductors of heat and electricity, and reacts with acids to form hydrogen gas?

a)

metals

b)

nonmetals

c)

metalloids

d)

ions

51.
How many "valance electrons" are in chlorine?
a)
7
b)
2
c)
17
d)
8
52.
Carbon-12, Carbon-13, and Carbon-14 are...
a)
ions
b)
isotopes
c)
electronegative
d)
radioactive
53.
How many Protons does Bromine have?
a)
45
b)
79.904
c)
80
d)
35
54.
How many Neutrons does Bromine have?
a)
35
b)
80
c)
45
d)
79.905
55.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

56.

Bromine-80 has how many neutrons?

a)

41

b)

42

c)

44

d)

45

57.

How many protons are in the isotope pictured above?

a)

29

b)

34

c)

63

d)

92

58.

How many neutrons are in the isotope pictured above?

a)

29

b)

34

c)

63

d)

92

59.

The mass number of an isotope is made up of which subatomic particles?

a)

protons and electrons

b)

protons and neutrons

c)

electrons and neutrons

d)

protons, neutrons and electrons

60.
A neutral atom of the isotope 2612Mg would consist of
a)
12 protons, 26 neutrons, 26 electrons
b)
26 protons, 12 neutrons, 26 electrons
c)
26 protons, 14 neutrons, 14 electrons
d)
12 protons, 14 neutrons, 12 electrons
61.
A carbon isotope consists of 6 protons, 6 electrons and 8 neutrons.  What is the mass number for this isotope?
a)
12
b)
14
c)
6
d)
8
62.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
63.

Calculate the number of Oxygen atoms in Al(OH)3

a)

1

b)

2

c)

3

d)

4

64.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

65.

Coefficients in chemical formulas...

a)

are found at the beginning of a formula and multiply just the first atom

b)

are found at the end of a formula and multiply EVERYTHING!

c)

are found at the end of a formula and multiply only elements inside the parentheses.

d)

are found at the beginning of a formula and multiply EVERYTHING!

66.

What type of reaction is shown?

a)

Decomposition

b)

Single replacement

c)

Combustion

d)

Combination (or Synthesis)

67.

What type of reaction is this?

a)

Combination (or Synthesis)

b)

Single replacement

c)

Double replacement

d)

Decomposition

68.

Which type of reaction is shown?

a)

Combustion

b)

Combination (or Synthesis)

c)

Decomposition

d)

Double replacement

69.

What are the products of a combustion reaction?

a)

a single complex compound

b)

several simpler elements

c)

carbon dioxide and water

d)

carbon dioxide and hydrogen

70.

Which type of reaction is shown?

a)

Single replacement

b)

Double replacement

c)

Combustion

d)

Decomposition

71.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
72.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
73.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
74.
Consider the equation 4 Fe+3 O2 → 2 Fe2O3 . In this equation, 3 O2 is a
a)
product
b)
reactant
c)
compound
75.

3 Pb + 2 H3PO4 ----> 3 H2 + 1 Pb3(PO4)2

a)

Synthesis (or combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

76.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of  atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
77.

a change in a substance that does not involve a change in the identity of the substance

a)

Physical change

b)

Chemical Change

78.

Rusting metal is an example of a ____ change.

a)

chemical

b)

phase

c)

state

d)

physical

79.

Which of the following is NOT a physical change?

a)

Crushing a can

b)

boiling water

c)

shredding paper

d)

burning paper

80.

Which scientist came up with the concept of the periodic table?

a)

Jason Priestly

b)

Dmitri Mendeleev

c)

Albert Einstein

d)

Gregor Mendel

81.
This type of graph is used to _______
a)
Compare different "groups"
b)
Compare something over time

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