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Honors Chemistry Final Exam Review 2025

Total questions: 62

Worksheet time: 2hrs 29mins

Name
Class
Date
1.

We know that combustion produces _____ because _____ turns cloudy when mixed with candle smoke.

a)

carbon dioxide; limewater

b)

carbon dioxide; cobalt chloride

c)

water; limewater

d)

water; cobalt chloride

2.

Which lab experiments below describe a situation where a chemical change has occurred? Check all that apply.

a)

After adding zinc to hydrochloric acid (HCl), a student observes bubbles forming in the solution and the temperature increases 10 °\degree  C.

b)

A student uses a mortar and pestle (a grinding stone) to break up large pieces of ammonium thiocyanate ( NH4SCNNH_4SCN  ) into smaller pieces.

c)

After combining an white solid with a clear, odorless liquid, there is a strong smell produced and the temperature increases 15°15\degree C.

d)

A student dissolves sugar ( C6H6O6C_6H_6O_6  ) into water ( H2OH_2O  ). The sugar crystals seem to disappear.

3.

Find the volume of a substance that has a density of 19.3 g/cm3 and a mass of 10.0 g.

a)

0.518 cm3

b)

193 cm3

c)

1.93 cm3

d)

29.3 cm3

4.
Calculate 7.987 m - 0.54 m and give your answer with the appropriate number of significant figures.
a)
7.45 m
b)
7.447 m
c)
7.4 m
d)
7.5 m
5.

Predict the products for this reaction: Al2O3 →

a)

Al + O2

b)

O + Al2

c)

Al2 + O3

d)

Al + O

6.

The following is what type of reaction?

PbCl2 + 2AgNO3 → Pb(NO3)2 + 2AgCl

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

7.

Which of the following will not undergo a reaction?

a)

silver metal + zinc oxide

b)

iron metal + copper(II) oxide

c)

zinc metal + iron(III) oxide

d)

magnesium metal + iron(III) oxide

8.

What is the name for MgF2 ?

a)

magnesium fluoride

b)

magnesium difluoride

c)

magnesium(II) fluoride

d)

magnesium fluorite

9.

Select the correct formula for sulfur hexachloride.

a)

S2Cl6

b)

S6Cl

c)

SCl6

d)

SCl2

10.

Name the compound CuCO3

a)

copper carbon oxide

b)

copper(III) carbonate

c)

copper(II) carbonate

d)

copper carbonate

11.
What is the mass of 0.75 moles of (NH4)3PO4?
a)
101.75 g
b)
121.75 g
c)
111.75 g
d)
131.75 g
12.

What is the percent by mass of fluorine in calcium fluoride?

a)

24%

b)

49%

c)

51%

d)

65%

13.

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.

a)

SO

b)

SO2

c)

SO3

d)

SO4

14.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
15.

What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696 g.

a)

K2SO4

b)

K8SO16

c)

K8S4O8

d)

K8S4O16

16.

How much SOCl2 should be produced when 16.2 g SO2 reacts with 13.7 g PCl5 according to the following equation? SO2 + PCl5 --> SOCl2 + POCl3

a)

7.87 g

b)

30.1 g

c)

26.4 g

d)

19.8 g

17.

Calculate the volume that a 0.323-mol sample of a gas will occupy at -8°C and a pressure of 0.900 atm.

a)

7.18 L

b)

7.81 L

c)

4.63 L

d)

4.36 L

18.

Juan enjoys balloon animals from the carnival. He just received a balloon giraffe that has an initial temperature of 39.0°C and a volume of 1.28 L. If Juan's sister, Olivia, plays a trick on him and puts his balloon giraffe into the freezer, what would be the new volume of the balloon if the temperature drops down to 8.0°C?

a)

1.42 L

b)

6.85 x 104 L

c)

3.78 L

d)

1.15 L

19.

A 250 mL sample of oxygen is collected over water at 25° C and 760.0 torr pressure. What is the pressure of the dry oxygen gas alone? (vapor pressure of water at 25° C = 23.8 torr)

a)

783.8 torr

b)

205.38 torr

c)

1250 torr

d)

736.2 torr

20.

When the temperature of a gas increases the particles

a)

speed up and move closer together.

b)

speed up and move farther apart.

c)

slow down and move closer together.

d)

slow down and move farther apart.

21.

How many neutrons does this isotope of titanium have?

a)

48

b)

22

c)

26

d)

70

22.

Which nuclear power plants part's function is to reduce the energy of fast neutrons so that the core can capture them?

a)

moderator

b)

coolant circulator

c)

control rods

d)

2nd water loop

23.

Which of these elements has the lowest ionization energy?

a)

oxygen

b)

fluorine

c)

sulfur

d)

chlorine

24.

A rigid plastic container holds 1.00 L methane gas at 0.9 atm pressure when the temperature is 22.0°C. How much more pressure will the gas exert if the temperature is raised to 44.6°C?

a)

0.97 atm

b)

1.82 atm

c)

0.97oC

d)

1.82oC

25.

If astatine-209 (atomic number 85) decays via alpha decay, what isotope will result?

a)

83205Bi

b)

86209Rn

c)

81207Tl

d)

85208At

26.
Emission of light from an atom occurs when an electron
a)
drops from a higher to a lower energy level.
b)
   jumps from a lower to a higher energy level.   
c)
   moves within its atomic orbital.
d)
falls into the nucleus.
27.

What electron configuration matches an oxygen atom?

a)

1s22s22p63s2, 3p64s23d104p5

b)

1s22s22p4

c)

1s22s22p6

d)

1s22s22p63s23p64s23d1

28.

The following is the electron configuration for what element?

[Xe] 6s2 4f14 5d9

a)

mercury

b)

gold

c)

platinum

d)

thallium

29.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
30.
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
a)
3.0g
b)
0.25mg
c)
0.3g
d)
0.25g
31.

Which atom has the largest atomic radius?

a)

potassium

b)

calcium

c)

rubidium

d)

strontium

32.

What molecular geometry is the structure shown here?

a)

linear

b)

trigonal planar

c)

tetrahedral

d)

trigonal pyramidal

33.

For which of the following would hydrogen bonding occur between molecules?

a)
b)
c)
d)
34.

How many mL of stock solution of 2.0 M NaCl do you need to prepare 100.0 mL of 0.150 M NaCl?

a)

7.5 mL

b)

15 mL

c)

1300 mL

d)

200 mL

35.
What is the molarity in 650. ml of solution containing 63 grams of sodium chloride?
a)
2.4 M
b)
0.86 M
c)
1.7 M
d)
0.54 M
36.

When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

a)

supersaturated

b)

saturated

c)

unsaturated

37.

In a famous experiment conducted by Ernest Rutherford, a few positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?

a)

The nucleus is negatively charged.

b)

The atom is a dense solid and is indivisible.

c)

The mass is conserved when atoms react chemically.

d)

The nucleus is very small and the atom is mostly empty space.

38.

This type of nuclear radiation has the highest penetrating power. It can penetrate our body, causing damage to DNA. Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

a)

alpha

b)

beta

c)

gamma

39.

2Fe2O3 + C → Fe + 3CO2

You react 28.00 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2?

a)

58.83%

b)

308%

c)

6435%

d)

15.5

40.

4180 j of heat energy are added to change the temperature of water by 10*C. How many grams of water are being heated? cwater=4.18 j/g*C

a)

4.18 j/g*C

b)

10000g

c)

174724g

d)

100g

41.

When two samples of similar mass are subjected to the same heat energy, the sample with the SMALLER specific heat will have a _________ temperature change.

a)

SMALLER

b)

LARGER

c)

EQUAL

42.

Heat energy ALWAYS transfers from ___ to ___

a)

Hot to Warm

b)

Cold to Cool

c)

Warm to Cool

43.

Which equation correctly represents the alpha decay of polonium-214?

a)

A

b)

B

c)

C

d)

D

44.
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
45.

Four substances were tested for pH: lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Rank these 4 substances from most basic to most acidic?

a)

lemon juice, milk, baking soda, bleach

b)

bleach, baking soda, milk, lemon juice

c)

milk, lemon juice, baking soda, bleach

d)

baking soda, bleach, lemon juice, milk

46.

An unknown substance was tested and found to have an extremely high concentration of hydroxide ions, OH-. and very low concentration of hydronium ions, H3O+. Which pH would make the most sense?

a)

pH = 2

b)

pH = 6

c)

pH = 8

d)

pH = 12

47.

Equal amounts of an acid and a base are mixed in a beaker. When neutralization is complete, what is in the beaker besides salt?

a)

acid only

b)

base only

c)

water

48.
if a solution has a pOH of 5.2 the [OH-] of the solution is
a)
6 x 10 -6 M
b)
6.3 x 10 -6 M
c)
1.58 x 10-5 M
d)
2 x 10-5 M
49.

Find the pH of a 0.000841 M solution of sodium hydroxide

a)

3.07

b)

9.88

c)

10.92

d)

11.23

50.
If the [H+] of a solution is 6.8 x 10-9 mol/L the pH is
a)
8.17
b)
8.2
c)
9.99
d)
8.62
51.

Is this molecule polar?

a)

Yes

b)

No

52.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
53.
A covalent bond is
a)
a bond that shares electrons metallicaly
b)
A bond that shares electrons with non metals
c)
Metalloids bonding
d)
metals and nonmetals bonding
54.

Is the following molecule polar or nonpolar?

a)

polar

b)

nonpolar

55.
According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?
a)
Pairs of valence electrons
b)
Inner shell electrons
c)
Mobile Electrons
d)
Electrons closest to the nucleus
56.

SiCl4 has what shape?

a)

trigonal planar

b)

pyramidal

c)

tetrahedral

d)

trigonal pyramidal

57.

3 atoms bonded and 0 lone pairs

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

58.

3 atoms bonded and 1 lone pairs

a)

true linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

59.

Use the chemical equation to answer the question:

CaC₂(s)   +  2 H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)

What is the ratio between H2O and C2H2?

a)

1:1

b)

2:2

c)

2:1

d)

1:2

60.

Use the chemical equation to answer the question:

CaC₂(s)   +  2 H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)

If I have 4 moles of water, how many moles of C2H2 will I produce?

a)

0.5

b)

1

c)

2

d)

4

61.

Iron(III) chloride is used to treat drinking and waste water. It can be made by reacting iron (Fe) with chlorine gas. Calculate the volume of chlorine gas (Cl2) at STP that will react with 0.10 mol of iron.

Fe + Cl2 --> FeCl3

Hint: Think about conversion mol Fe --> (a)   ---> L Cl2

note: only include number in answer, not unit

62.

How many moles of water would be produced if 4.60x1023 molecules of ammonium nitrate (NH4NO3)  were decomposed?

2NH4NO3  → 2N2O  + 4H2O

Hint: Think about conversion factor molecules NH4NO3 --> (a)   --> mol H2O

note: answer should only include the number, not the unit

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