Final Exam

Navigation » List of Schools » West Los Angeles College » Chemistry » Chem 051 – Fundamentals of Chemistry » Winter 2021 » Final Exam

Need help with your exam preparation?

Existing Quiz Clients Login here

Below are the questions for the exam with the choices of answers:

Try The Exam

Question #1

Which represents the greatest mass?

A 1.0 mol Al

B 1.0 mol Fe

C 1.0 mol Cu

D all the same

E 1.0 mol Zn

Question #2

The oxidation product of a primary alcohol is

A an ether.

B a tertiary alcohol.

C a ketone.

D an alkene.

E an acid.

Question #3

The most characteristic reaction of the alkenes is

A oxidation.

B substitution.

C addition.

D addition and elimination.

E reduction.

Question #4

If temperature and pressure are held constant, the volume and number of moles of a gas are

A not enough information given

B independent of each other

C directly proportional

D inversely proportional

E equal

Question #5

How many electrons are in the third principal energy level (n = 3) of one atom of Fe?

A 18

B none of these

C 8

D 2

E 14

Question #6

At 1 atm of pressure and a temperature of 0°C, which phase(s) of H2O can exist?

A ice and water

B water vapor only

C water only

D ice and water vapor

E ice only

Question #7

Perform the indicated conversion: 2.63 X 103 cal = _______________ J

A 629 J

B 1.10 X 104 J

C 6.29 X 105 J

D 1.59 x 10–3 J

E 11.0 J

Question #8

Which of the following is an incorrect designation for an atomic orbital?

A 4f

B 2p

C 2d

D 3s

E 1s

Question #9

True or false? Reduction is a gain of electrons.

A TRUE

B FALSE

Question #10

If you mix 20.0 mL of a 3.00 M sugar solution with 30.0 mL of a 5.30 M sugar solution, you will end up with a sugar solution of ________.

A 0.166 M

B 4.15 M

C 7.30 M

D 10.95 M

E 4.38 M

Question #11

You have 25.00 mL of a 0.1000 M sugar solution. How much water must be added to make a 0.01042 M solution?

A 2.61 mL

B 22.4 mL

C 214.9 mL

D 239.9 mL

E 26.1 mL

Question #12

The alkaline earth metals have how many valence electrons?

A 8

B 2

C 7

D 3

E 1

Question #13

True or false? The law of conservation of enery states that energy can be converted from one form to another but can be neither created nor destroyed.

A FALSE

B TRUE

Question #14

Which of the following has a double C-O bond and a single C-O bond?

A aldehyde

B ester

C ketone

D alcohol

E amine

Question #15

The state of matter for an object that has a definite volume but not a definite shape is

A mixed

B gaseous

C liquid

D solid

E elemental

Question #16

A solution with a pH of 2.17 is

A basic

B acidic

C neutral

Question #17

The number of protons in a given nucleus determines the

A number of electrons.

B atomic number.

C mass number.

D number of protons.

E number of isotopes.

Question #18

An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride.

Identify the solid in the balanced equation.

A NaCl

B There is no solid formed when the two solutions are mixed.

C CaCO3

D CaCl2

E Na2CO3

Question #19

A given set of d orbitals consists of ______________ orbital(s).

A 1

B 6

C 3

D 5

Question #20

The number of significant figures in 0.074100 × 10–4 is

A 4

B 6

C 7

D 5

E 3

Question #21

The air in the inner tube of the tire of a racing bike has a pressure of 110.2 psi. Convert this pressure to atm.

A 110.2 atm

B 1.088 atm

C 7.497 atm

D 0.1450 atm

E 1620 atm

Question #22

Choose the state of water in which the water molecules are farthest apart on average.

A liquid

B steam (vapor)

C ice (solid)

D all the same

Question #23

If you were to heat pentanoic acid and 2-butanol with a strong acid, you would most likely discover in your flask:

A an ester

B a ketone

C an amine

D an aldehyde

E an alkane

Question #24

The number of unpaired electrons in a nitrogen atom is

A 6

B 3

C 4

D 7

E 5

Question #25

A solution has [OH–] = 2.8 X 10–7 M. The [H+] in this solution is

A 2.8 X 107 M

B 3.6 X 10–8 M

C 2.8X 107 M

D 3.6 X 107 M

Question #26

A solution with a pH of 2 is how many times more acidic as a solution with a pH of 3?

A 0.7

B 2

C 10

D 5

E 100

Question #27

Name the following:

CH3C ≡ CCH2CH2Cl

A 5-chloro-2pentyne

B 2-chloro-5pentyne

Question #28

True or false? The calorie is defined as the amount of energy (heat) required to raise the temperature of one gram of water by one degree Celsius.

A FALSE

B TRUE

Question #29

The reaction HCl(aq) + KOH(aq) → H2O(l) + KCl(aq) is a(n) ______________ reaction.

A single-replacement

B precipitation

C acid-base

D oxidation-reduction

E none of these

Question #30

True or false? N2 is an example of a covalent bond.

A FALSE

B TRUE

Question #31

Which of the following compounds contains an ionic bond?

A NaCl

B O2

C HCl(g)

D SO2

E CCl4

Question #32

The oxidation product of a secondary alcohol is

A a tertiary alcohol.

B a ketone.

C an acid.

D an ester.

E an aldehyde.

Question #33

When an electron in the ground state absorbs energy, it goes to a(n) ______________ state.

A ionic

B excited

C frenetic

D lower

E stable

Question #34

The complete combustion of heptane, C7H16, which is a volatile hydrocarbon, yields carbon dioxide and water:
__ C7H16 + __ O2 → __ CO2 + __ H2O
The coefficient of oxygen in the balanced equation is

A 9

B 11

C 13

D 15

E 8

Question #35

The best answer to report for 131.00 – 31.9904 is

A 99.010.

B 99.0.

C 99.01.

D 99.0096.

E 99

Question #36

The total mass of a solution is 171.5 g. The solvent mass is 125.2 g. What is the mass percent of the solute?

A Not enough information is given.

B 18.1%

C 27.0%

D 38.0%

E 73.0%

Question #37

Which of the following compounds contains one or more covalent bonds?

A CaO

B CO2

C BaBr2

D NaCl

E Cs2O

Question #38

The elements chlorine and iodine have similar chemical properties because they

A have the same number of stable isotopes

B have the same number of electrons in their outer energy levels

C none of these

D are in the same chemical period

E are both metals

Question #39

Which of the following will yield a carboxylic acid upon oxidation?

A tertiary alcohol

B an aldehyde

C a cycloalkane

D a secondary alcohol

E a ketone

Question #40

Chemical reactions involving alkanes in which hydrogen atoms are removed and the product is an unsaturated hydrocarbon are called

A dehydrogenation reactions.

B addition reactions.

C combustion reactions.

D substitution reactions.

E polymerization reactions.

Question #41

A substance that, when dissolved in water, produces a solution that conducts electric current very efficiently is called

A none of these

B an electrical solute

C a strong electrolyte

D a weak electrolyte

E a strong ion

Question #42

How many protons, electrons, and neutrons, respectively, does 127I have?

A 53, 127, 74

B 53, 53, 74

C 74, 53, 127

D 53, 53, 127

E 53, 74, 53

Question #43

H2CCHCH2N(CH3)2 is

A an alkyne and a secondary amine.

B an alkyne and a tertiary amine.

C an alkene and a primary amine.

D an alkene and a tertiary amine.

Question #44

There are three isotopes of carbon differing with respect to

A atomic number.

B nuclear charge.

D electron configuration.

E neutrons.

F number of protons.

Question #45

True or false? Arrhenius postulated that acids produce hydrogen ions in aqueous solution, whereas bases produce hydroxide ions.

A FALSE

B TRUE

Question #46

True or false? CH4 has ionic bonds.

A FALSE

B TRUE

Question #47

The chemical formula for iron(III) sulfide is

A Fe3(SO3)2.

B Fe2S3.

C Fe2(SO4)3.

D Fe2(SO3)3.

Question #48

3.03 mol of CO2 at STP will occupy

A 74.1 L

B 67.9 g

C 8.93 × 10–2 L

D 67.9 L

E 33.9 L

Question #49

Oxidation of a primary alcohol results in a(n) __________ and oxidation of a secondary alcohol results in a(n) _________.

A ketone, aldehyde

B carboxylic acid, amine

C ester, ether

D amine, carboxylic acid

E aldehyde, ketone

Question #50

True or false? The equation N2(g) + 3H2(g) → 2NH3(g) can be interpreted by saying that 1 mol of N2 reacts with 3 mol of H2 to form 2 mol of NH3.

A TRUE

B FALSE

Question #51

Which of the following statements is/are correct?

A In an acidic solution, [H+] > [OH-]

B In an acidic solution, [H+] > [OH-], In a basic solution,[OH-] > [H+], and In a neutral solution, [H+] = [OH-] .

C In a basic solution,[OH-] > [H+]

D In a neutral solution, [H+] = [OH-]

E None of the above statements are correct.

Question #52

The formula for potassium carbonate is

A Po2CO3.

B K2CO3.

C K2C.

D P2C.

E P2CO3.

Question #53

A 2.2-mol sample of KClO3 was decomposed according to the equation 2KClO3(s) → 2KCl(s) + 3O2(g) How many moles of O2 are formed?

A 1.8 mol

B 2.2 mol

C 1.1 mol

D 3.3 mol

E 1.5 mol

Question #54

1s22s22p63s23p64s23d7 is the electron configuration for which of the following atoms?

A Co

B Cr

C Ar

D Ca

E Fe

Question #55

Heat is typically measured in

A grams

B °F

C °C

D joules

Question #56

Calculate the heat given off when 101.4 g of copper cools from 155.0oC to 23.0oC. The specific heat of copper is 0.385 J/g oC.

A 8.98 × 102 J

B 6.05 × 103 J

C none of these

D 3.48 × 104 J

E 5.15 × 103 J

Question #57

In the reaction 2Cs(s) + Cl2(g) → 2CsCl(s), the chlorine is ______________.

A reduced

B synthesized

C electrolyzed

D oxidized

Question #58

Identify the type of organic compound shown: (CH3)3N

A ketone

B amine

C aldehyde

D ester

Question #59

Which of the following elements is most similar to chlorine?

A Br

B He

C H

D Hg

E Na

Question #60

Which particle has the smallest mass?

A electron

B neutron

C helium nucleus

D proton

Try The Exam

Fresh Grad Lands Job as Real Estate Agent With Help from Professional Writers

Need help with your exam preparation?

Below are the questions for the exam with the choices of answers:

Christian S.

Tyra

Linda

Manush

We accept payment