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Semester 1 H. Chem Final Exam Review 2021/22

Total questions: 80

Worksheet time: 20hrs 0mins

Name
Class
Date
1.

What is 78.5 rounded to one significant figure?

a)

79

b)

78.5

c)

70

d)

80

2.

Round off 1,296,717 to 2 significant figures

a)

1,290,000

b)

1,296,000

c)

1,297,000

d)

1,300,000

3.

Round 0.010229 to four significant figures

a)

1022

b)

1023

c)

0.01023

d)

0.01022

4.

Calculate the volume of an object: 230 m x 4.88 m x 0.0643 m, rounding to the correct number of significant figures.

a)

72.17 m3

b)

72 m3

c)

72.2 m3

d)

70 m3

5.

Calculate and round to the correct number of significant digits.

a)

332.6

b)

333

c)

330

d)

33

6.
Read the balance
a)
272.05 g
b)
272.25 mL
c)
272.1 g
d)
720.25 g
7.
Volume?
a)
63.5 mL
b)
63 mL
c)
63.55 mL
d)
6 mL
8.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
9.

Water boils at 100˚C. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

10.

Stomach acid has a pH of approximately 2. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

11.

Copper is a good conductor of heat and electricity. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

12.

A group of campers burned some wooden logs to make a bonfire. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

13.
What is a mixture?
a)
elements chemically combined
b)
a combination of different things
c)
it is found on the Periodic Table 
d)
it is made of chemical
14.
What type of mixture is this?
a)
heterogeneous 
b)
homogeneous
15.
A substance that is made up of only one kind of atom is a(an)
a)
compound
b)
homogeneous mixture
c)
element
d)
solution
16.

What evidence(s) of a chemical reaction do you see in the pictures? (Select all that are correct)

a)

Gas

b)

Precipitate

c)

Color Change

d)

Giving off light

17.

A solid is formed when two liquids (or solutions) are mixed together. Select the correct vocabulary word that goes with this definition.

a)

cloud

b)

precipitate

c)

vinegar

d)

heat

18.

Each substance to the right of the arrow in a chemical equation that is a new substance made as a result of the chemical reaction is a _____.

a)

catalyst

b)

precipitate

c)

reactant

d)

product

19.

Chemical equations must be balanced because they describe how chemical reactions obey the principle of _____.

a)

Activation

b)

Decomposition

c)

Conservation of mass

d)

Reactants

20.

Which of the following statements about elements and compounds is accurate?

a)

Elements are many different types of atoms together but compounds are just one type of atom.

b)

Elements are pure substances that cannot be broken down physically but compounds are pure substances that can be broken down physically.

c)

Elements are not found on the Periodic Table but compounds are found on the Periodic Table.

d)

Elements are pure substances that cannot be broken down chemically but compounds are pure substances that can be broken down chemically.

21.

Which is a form of heterogeneous mixture?

a)

gravel and water

b)

sugar and water

c)

powdered milk and water

d)

powdered coffee and water

22.
____ is another name for a homogeneous mixture. 
a)
Solution
b)
Suspension
c)
Substance
d)
Liquid 
23.

What kind of mixture is shown in the picture?

a)

Homogeneous

b)

Heterogeneous

24.

What is the volume of 150 grams of lead if it has a density of 11.3 g/cm3?

a)
13.3 g
b)
13.3 cm3
c)
.075 g
d)
1695 cm3
25.
What would the mass of an object be if it has a density of 10g/mL and a volume of 5 mL?
a)
50 grams
b)
2 grams
c)
0.5 grams
d)
5 grams
26.
Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses. 
a)
protons, neutrons
b)
protons, electrons
c)
neutrons, protons
d)
electrons, protons
27.

The nucleus of an atom contains which subatomic particles?

a)

protons and electrons

b)

protons and neutrons

c)

electrons and neutrons

d)

protons, electrons, and neutrons

28.

Typically in an atom, which two subatomic particles are equal in number?

a)

protons and neutrons

b)

all subatomic particles are equal in number

c)

neutrons and electrons

d)

protons and electrons

29.
What is the atomic number for an element with 41 neutrons and a mass number of 80?
a)
39
b)
41
c)
80
d)
121
30.

How many protons are present in phosphorus-31? (You need a periodic table)

a)
15
b)
16
c)
31
d)
46
31.

The vertical columns on the periodic table are called:

a)

periods

b)

elements

c)

groups

d)

matter

32.

The horizontal rows on the periodic table are called:

a)

periods

b)

elements

c)

groups

d)

matter

33.
Which of the following is the most reactive group of non-metals? 
a)
Alkali
b)
Alkali Earth
c)
Halogen
d)
Noble Gas
34.
How many valence electrons does an alkaline earth metal have? 
a)
1
b)
2
c)
7
d)
8
35.

This type of element is dull, brittle solids and gases, insulators, poor conductors of heat and electricity, as well as having low melting points.

a)

metals

b)

metalloids

c)

nonmetals

36.

What is a metalloid?

a)

Elements that have properties that are a mixture of metal and non-metal properties

b)

Elements that are shiny

c)

Elements that want to be metals, but are non-metals

d)

Metalloids don't exist

37.

Which color on the image of the periodic table corresponds with the noble gases?

a)

red

b)

black

c)

blue

d)

orange

38.

Which element has a higher electronegativity value?

a)

Niobium

b)

Tin

c)

Cadmium

d)

Iodine

39.

What does electronegativity do as you go across a period?

a)

decrease

b)

no pattern

c)

stay the same

d)

increase

40.

As you move across a period, the outer electrons are ________ to the nucleus, so the nucleus of the atom is ________ to attract electrons in a bond.

a)

closer, more able

b)

closer, less able

c)

further, less able

d)

further, more able

41.
Which of the following is NOT a characteristic of most metals?
a)
Brittle
b)
Good conductor
c)
Ductile
d)
Malleable
42.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
43.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
44.
Identify the Electron Configuration for Aluminum (Al)
a)
1s2 2s2 2p6 3s2 3p1
b)
1s2 2s2 2p6 3s2 3p3
c)
1s2 2s2 2p6 3s2 4p1
45.
Which of the following statements is true about the 3s and the 4s sublevels?
a)
These sublevels have the same energy
b)
These sublevels are the same distance from the nucleus
c)
These sublevels hold different amounts of electrons
d)
These sublevels have the same shape
46.

The maximum number of electrons that can fit into the 2nd energy level is

a)

2

b)

8

c)

18

d)

32

47.

Of the following sublevels, which is the highest in energy?

a)

4s

b)

3d

c)

4p

d)

5s

48.
What is the shape of a p orbital?
a)
sphere
b)

flower

c)

dumbbell (or peanut)

d)

doughnut

49.
How many p orbitals are there in a sublevel?
a)
2
b)
1
c)
4
d)
3
50.
Which orbital has the least amount of energy? 
a)
p orbital
b)
d orbital
c)
s orbital 
d)
What is an orbital?
51.

High frequency waves have _________ wavelength and _______ energy.

a)

varying, low

b)

short, high

c)

long, high

d)

long, low

52.

Mendeleev's genius was his ability to

a)

predict elements that were not discovered yet

b)

organize elements by their mass

c)

have an element named after himself

d)

organize elements by properties

53.

How many electrons can a d sublevel hold?

a)

14

b)

10

c)

2

d)

6

54.

The maximum number of electrons that can fit into the 2nd energy level is

a)

2

b)

8

c)

18

d)

32

55.

In this image, the information in red are called _______.

a)
Products
b)
Reactants
c)

Chemical Subscripts

d)
Ingredients
56.
In this image, the information to the right of the arrow (in black) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Final chemical
57.
What is the arrow in a chemical equation say to us as chemists...
H2 + O --> H2O
a)
Reactants
b)
Products 
c)
"Makes" or "Yields" 
d)
Chemical Equation 
58.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
59.

How many ELEMENTS are in the compound H2O

a)
1
b)
2
c)
3
d)
4
60.

How many ELEMENTS are in the compound O2

a)
1
b)
2
c)
3
d)
4
61.

How many ATOMS of Carbon are in 3C2H4O?

a)
2
b)
3
c)
4
d)
6
62.

How many ATOMS of Oxygen are in 3Fe2O3 ?

a)
2
b)
3
c)
6
d)
9
63.

How many TOTAL atoms are in 2H2SO4 ?

a)
2
b)
4
c)
7
d)
14
64.
Is the following equation balanced or unbalanced ? 
N2 +3 H2 --> 2NH3
a)
Balanced
b)
Unbalanced
65.
Balance this equation,            Al2O3 ---> Al + O2 
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2 
c)
2Al2O3 ---> 4Al + 3O2 
d)
3Al2O3 ---> 2Al + O2 
66.
How many atoms of lead (Pb) are in Pb(NO₃)₂?
a)
1
b)
2
c)
3
d)
6
67.
What is the name and charge on this compound ion
a)
Hydrogen oxide +1
b)
Hydrogen oxide -1
c)
Hydroxide +1
d)
Hydroxide -1
68.
What is the name and charge on this compound ion
a)
Ammonium -1
b)
Ammonium +1
c)
Ammonia -1
d)
Ammonia +1
69.
What is the name and charge on this compound ion
a)
Sulfate +2
b)
Sulfate -2
c)
Sulfide +2
d)
Sulfide -2
70.
What is the name and charge on this compound ion
a)
Nitrate +1
b)
Nitrate -1
c)
Nitrate -2
d)
Nitrate +2
71.

Magnesium can be burned in air to produce solid magnesium oxide. What is the balanced equation that represents this reaction?

a)
2Mg(s) + O2(g)→ 2MgO(s)
b)
Mg(s) + O(g) → MgO(s)
c)
2Mg(s) + CO2(g) → 2MgO(s) + C(s)
d)
2Mg(s) + O2(g) → Mg2O2(s)
72.

What type of chemical reaction is the one below?

2AlCl3 + 3Na2CO3 → Al2(CO3)3 + 6NaCl

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

73.

What type of chemical reaction is the one below?

C4H10 + O2 →CO2 + H2O

a)

single replacement

b)

synthesis

c)

combustion

d)

single replacement

74.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
75.

Which type of reaction is this: 4Si + S8 --> 2Si2S4

a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
76.

Which type of reaction is this: 3Ca + 2AlCl3 --> 3CaCl2 + 2Al

a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
77.

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO3 → Ag + _____

a)

Cu(NO3)2

b)

CuNO3

c)

CuAg

d)

Cu

78.

Predict the products for the decomposition of aluminum oxide, Al2O3 →

a)

Al + O2

b)

O + Al2

c)

Al2 + O3

d)

Al + O

79.

Predict the products of this reaction:

C2H4 + O2 →

a)

C2O2 + H4

b)

CO2 + H2 + O2

c)

CO + H

d)

CO2 + H2O

80.

According to the activity series, which of the following single replacement reactions can occur?

a)

Ca + Al2(SO4)3

b)

Fe + NaOH

c)

Ni + MgSO4

d)

Al + KOH

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