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Semester 2 Review

Total questions: 79

Worksheet time: 1hrs 16mins

Name
Class
Date
1.
Which conversion factor is used to convert between atoms and moles?
a)
Avogadro's number
b)
Molar mass
c)
Mole ratio
d)
Molar Volume
2.
When solving the problem, "How many grams of oxygen, O2 are required to react with 26.8 g of Mg?", which conversion factor do you use FIRST?
2 Mg  +  O2 → 2 MgO
a)
Avogadro's Number
b)
Molar Mass
c)
Mole Ratio
d)
Molar Volume
3.
How many moles of magnesium oxide, MgO, are represented in the equation below?
2 Mg  +  O2 → 2 MgO
a)
1
b)
2
c)
3
d)
4
4.
Which conversion factor is used to convert between moles and grams?
a)
Avogadro's number
b)
Molar mass
c)
Mole ratio
d)
Molar Volume
5.
When solving the problem, "What mass of aluminum chloride is produced when 1.68 moles of HCl?", which conversion factor do you use FIRST?
2 Al  +  6 HCl →  2 AlCl3  +  3 H2
a)
Avogadro's Number
b)
Molar Mass
c)
Mole Ratio
d)
Molar Volume
6.
Which conversion factor is used to change substances?
a)
Avogadro's number
b)
Molar mass
c)
Mole ratio
d)
Molar Volume
7.
Which conversion factor is used to change substances?
a)
Avogadro's number
b)
Molar mass
c)
Mole ratio
d)
Molar Volume
8.
Balance the following reaction :
 
CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
9.
9. Complete the equation for the percent yield of a chemical reaction:
Percent yield=(________)÷(________)×100%
a)
actual yield; theoretical yield
b)
theoretical yield; actual yield
10.
If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
a)
theoretical yield
b)
mole ratio
c)
actual yield
d)
percentage yield
11.
Endothermic reactions feel
a)
warm
b)
cold
12.
The energy in endothermic reactions is
a)
released
b)
absorbed
13.
Heat flows from _______ to ______ objects
a)
cooler to warmer
b)
warmer to warmer
c)
warmer to cooler
d)
cooler to cooler
14.
Heat is measured in 
a)
joules
b)
grams
c)
°Celcius
d)
J/g⋅°C
15.
In the specific heat formula "q" stands for which variable?
a)
energy
b)
mass
c)
specific heat
d)
change in temperature
16.
In the specific heat formula "Cp" stands for which variable
a)
energy 
b)
mass
c)
specific heat
d)
change in temperature
17.
The energy in exothermic reactions is
a)
released
b)
absorbed
18.
The unit for specific heat is:
a)
g/J⋅°C
b)
Celsius
c)
Joule
d)
J/g⋅°C
19.
Is Evaporation endothermic or exothermic?
a)
endothermic
b)
exothermic
20.
__ is the measure of the average kinetic energy of the particles in a sample of matter
a)
Energy
b)
Temperature
c)
Entropy
d)
Gibb's Energy
21.
___ is the amount of energy that is required to raise the temperature of one gram of a substance by one degree Celsius (1°C). 
a)
Heat
b)
Specific Heat
c)
Mass
d)
Temperature
22.
When Magnesium and oxygen react, they produce a bright white light and gives off heat. What type of reaction is this?
a)
Endothermic
b)
Exothermic
23.
Is Freezing endothermic or exothermic?
a)
endothermic
b)
exothermic
24.

A homogeneous mixture made up of solutes in a solvent is called a

a)

Solutions

b)

Suspension

c)

Colloid

25.
The ___ is the thing being dissolved.
a)
solute
b)
solvent
c)
mixture
d)
suspension
26.

A substance that cannot be dissolved into a solution is called

a)

soluble

b)

insoluble

27.
This solution would be considered
a)
Unsaturated
b)
Supersaturated
c)
Saturated
d)
Undefined
28.
This graph represents a(n) ___ solution
a)
saturated
b)
supersaturated
c)
unsaturated
d)
undefined
29.

How many grams of Pb(NO3)2 are soluble in 100 g of water at 65 ºC?

a)

80 grams

b)

100 grams

c)

40 grams

d)

90 grams

30.
What is the maximum temperature where at least 60 g of HCl can dissolve?
a)
45 ⁰C
b)
55 ⁰C
c)
35 ⁰C
d)
65 ⁰C
31.

The solubility graph below shows the amounts of four substances that will dissolve in 100 grams of water at various water temperatures.


Which substance has 80 grams of solute dissolved in 100 grams of water at 50 C?

a)

Potassium Bromide, KBr

b)

Ammonium Chloride, NH4Cl

c)

Potassium Chloride, KCl

d)

Lithium Hydroxide, LiOH

32.

This type of mixture contains two or more substances that are NOT uniform meaning they are visibly distinguishable.

a)

homogeneous

b)

heterogeneous

33.

Which term describes a solution in which there is LESS than the maximum amount of solute that can be dissolved in a given amount of solvent?

a)

Unsaturated

b)

Saturated

c)

Supersaturated 

d)

Homogenous

34.

Which term describes a solution that CONTAINS THE MAXIMUM AMOUNT of solute that can be dissolved in a given amount of solvent?

a)

Unsaturated

b)

Saturated

c)

Supersaturated

d)

Homogenous

35.

Which term describes a solution in which there is MORE than the maximum amount of solute that can be dissolved in a given amount of solvent?

a)

Unsaturated

b)

Saturated

c)

Supersaturated

d)

Homogenous

36.

A type of mixture where the particles are larger than those in a solution but not heavy enough to settle out.

a)

Homogeneous mixture

b)

Colloid

c)

Suspension

d)

Compound

37.

Which of the following is NOT a way to speed up the dissolving of a solute?

a)

agitation

b)

increase in temperature

c)

increase in surface area

d)

larger solute particles

38.

A heterogeneous mixture in which the particles will settle out if left undisturbed

a)

Colloids

b)

Suspensions

c)

Miscible

d)

Immiscible

39.

Which of the following terms is the substance that does the dissolving in solution

a)

Miscible

b)

Immiscible

c)

Solute

d)

Solvent

40.

What term is used to describe two liquids that do not mix but separate into layers based on density?

a)

miscible

b)

liquid

c)

immiscible

d)

gas

41.
What is it called when the state of matter changes from a liquid to a solid?
a)
Vaporization
b)
Freezing
c)
Condensation
d)
Melting
42.

The process of changing a gas to liquid is called __________

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

43.
Pressure is caused by ______.
a)
gravity.
b)
gas molecules colliding with each other.
c)
gas molecules colliding with surfaces of the container.
d)
gas molecules reacting with each other.
44.
When a gas changes directly to a solid, the process is known as what?
a)
Sublimation
b)
Condensation
c)
Deposition
d)
Evaporation
45.

What will occur when the substance changes from 0o C to 100oC at a constant pressure of 30 atm? (Diagram A)

a)

condensation

b)

vaporization or boiling

c)

melting

d)

freezing

46.

What is point A?

a)

triple point

b)

critical point

c)

equilibrium point

d)

normal melting point

47.
What state of matter is X?
a)
solid 
b)
liquid
c)
gas
d)
supercritical fluid
48.
What state of matter is Y?
a)
solid 
b)
liquid
c)
gas
d)
supercritical fluid
49.

What change occurs from E to F?

a)
sublimation
b)
deposition
c)
melting
d)
condensation
50.
What change occurs from E to C?
a)
sublimation
b)
freezing
c)
melting
d)
boiling
51.
What is point B?
a)
triple point
b)
critical point
c)
equilibrium point
d)
normal melting point
52.
Above the temperature of point B, this substance exists as a ____________.
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
53.

According to the Kinetic Molecular Theory a liquid's (SELECT ALL THAT APPLY)

a)

particles are held close together by intermolecular forces

b)

particles are in constant motion

c)

particles are vibrating in place and closely packed

d)

particles are not moving

54.

Refer to the picture of water sticking to the side of a test tube; this is occurring because of:

a)

Adhesion

b)

Cohesion

55.

The tendency of molecules of the same kind to stick to one another is

a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
56.
What is viscosity?
a)
A liquid's resistance to flow.
b)
a liquids flow.
c)
a liquid
d)
gas to solid.
57.
What is viscosity?
a)
A liquid's resistance to flow.
b)
a liquids flow.
c)
a liquid
d)
gas to solid.
58.
What line segment represents only the solid state?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
59.
Which segment represents the heat of fusion?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
60.
What state(s) of matter are present at D-E?
a)
Solid-liquid
b)
Liquid
c)
Liquid-gas
d)
Gas-Solid
61.
Between which points is the temperature of the substance remaining constant?
a)
A-B only. 
b)
A-B, C-D, E-F
c)
B-C only. 
d)
B-C, D-E
62.
Between which points is the substance changing state?
a)
A-B only. 
b)
A-B, C-D, E-F
c)
B-C only. 
d)
B-C, D-E
63.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
64.
When you dropped a hot metal sample into room temperature water in the lab what happened?
a)
the heat from the metal traveled into the water
b)
the cool from the water traveled into the hot metal
c)
both of the other answers are correct
65.

On this heating curve of water, point B is known as:

a)

zero point

b)

melting point

c)

boiling point

d)

point of no return

66.

On this heating curve of water, point D is known as:

a)

boiling point

b)

freezing point

c)

melting point

d)

solid/liquid transition

67.

This symbol indicates that the reaction is a ____________reaction.

a)

reversible

b)

completion

c)

double displacement

d)

synthesis

68.
When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in
a)
Chemical Equilibrium
b)
Chemical Balance
c)
Stoichiometry
d)
Chemical Reaction
69.

For the reaction...

SO2 + O2 ⇌ SO3

If the concentration of SO2 is increased, the equilibrium of the reaction will ___________.

a)

shift left

b)

shift right

c)

not shift either direction

70.

For the reaction...

N2 (g) + 3 H2(g) ⇌ 2 NH3 (g)


If the pressure in the system is increased, which substance(s) will increase in concentration?

a)

N2

b)

H2

c)

N2 and H2

d)

NH3

71.

2SO2(g)+O2(g)⇌2SO3(g)

If O2(g) is removed, the reaction will

a)

shift right

b)

shift left

c)

NOT shift

72.

2SO2(g)+O2(g)⇌2SO3(g)

If SO3(g) is removed, the reaction will

a)

shift right

b)

shift left

c)

NOT shift

73.

H2(g)+Cl2(g)⇌2HCl(g)

If Cl2(g) is removed, the reaction will

a)

shift right

b)

shift left

c)

NOT shift

74.

H2(g) + Cl2(g) ⇌ 2 HCl(g) + energy

What will happen to the equilibrium if the temperature is increased?

a)

equilibrium shifts right

b)

equilibrium shifts left

c)

equilibrium will NOT shift

75.

A complete reaction is one in which

a)

All the reactants convert into products

b)

the reactants convert into products and the products reform into reactants.

c)

Half reactants convert into products

76.

A chemical reaction where the reactants form products that, in turn, react together to give the reactants back is called a

a)

reversible reaction

b)

irreversible reaction

c)

decomposition reaction

d)

completion reaction

77.

For the reaction...

H2 (g) + Cl2 (g) ⇌ 2 HCl (g) + heat

If the temperature is cooled, the _________ reaction will be favored.

a)

forward

b)

reverse

c)

forward and reverse

78.

Le Chatelier's Principle states that:

a)

a disturbing force must be applied to a system in order for it to reach equilibrium.

b)

when a system at equilibrium is disturbed, a new equilibrium constant is established.

c)

when a chemical system at equilibrium is disturbed, the system shifts in order to minimize the effect.

d)

when a chemical system is at equilibrium it is no longer possible to alter the system.

79.

Which symbol is used to indicate that REACTANTS are favored in a reversible reaction?

a)
b)
c)
d)

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