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Chemistry 151 Final

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A quiz made up of multiple choice questions from my exams.
mmchamp95
Quiz by mmchamp95, updated more than 1 year ago
mmchamp95
Created by mmchamp95 almost 10 years ago
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Resource summary

Question 1

Question
A 9.0 g sample of solid sodium bicarbonate completely decomposes into solid sodium hydroxide and carbon dioxide gas when heated. After the sodium hydroxide cools it has a mass of 4.74 g. According to the Law of Conservation of Mass, what mass of carbon dioxide must have been formed?
Answer
  • a) 4.67 g
  • b) 4.26 g
  • c) 4.3 g
  • d) 13.7 g
  • e) none of the above

Question 2

Question
A substance that can only be separated by chemical means is:
Answer
  • an element
  • a compound
  • either a compound or an element
  • a homogenous mixture
  • a heterogeneous mixture

Question 3

Question
Which of the following statement(s) is(are) not correct?
Answer
  • a) The conversion of compounds into elements is a chemical change.
  • b) The conversion of sugar into carbon and water is a chemical change.
  • c) The conversion of liquid water into gaseous water is a chemical change.
  • d) The conversion of elements into compounds is a chemical change.
  • e) The evaporation of water is a physical change.
  • f) d and e

Question 4

Question
Which of the following is a mixture?
Answer
  • a) sucrose (C12H22O11)
  • b) solder (an alloy made of varying amounts of Sn and Pb)
  • c) the diatomic gas bromine (Br2)
  • d) both a and b
  • e) both b and c

Question 5

Question
If the distance between layers of silicon atoms in graphite is given as 823 pm, what is the distance in cm?
Answer
  • 8.23 x 10^-10
  • 8.23 x 10^-12
  • 8.23 x 10^-7
  • 8.23 x 10^-8
  • 8.23 x 10^-6

Question 6

Question
A 0.75 kg sample of methylene chloride has a density of 1.32 x 10^3 mg/cm^3. What is the volume in L of methylene chloride?
Answer
  • 0.99 L
  • 5.7 L
  • 5.68 x 10^-1 L
  • 5.7 x 10^-1
  • 0.5682 L

Question 7

Question
The British physicist who won the Nobel Peace prize in 1906 for the discovery of the electron was:
Answer
  • Ernest Rutherford
  • JJ Thomson
  • Robert Millikan
  • James Chadwick

Question 8

Question
Which statement is not true of the nucleus of an atom?
Answer
  • a) it contains the neutrons, protons and electrons
  • b) it is at the center of an atom
  • c) its overall charge is positive
  • d) it contains most of the mass of an atom
  • e) both a and d

Question 9

Question
The number of protons in a neutral atom of a given element is equal to:
Answer
  • a) the mass number
  • b) the nuclear number
  • c) the atomic number
  • d) the number of electrons
  • e) both b and c
  • f) both c and d

Question 10

Question
How many protons, neutrons and electrons are in the isotope of Ni+2 having a mass number of 57?
Answer
  • 28p, 29n, 30e-
  • 57p, 29n, 28e-
  • 28p, 29n, 26e-
  • 28p, 57n, 26e-

Question 11

Question
The formulas of the phosphate ion, the ammonium ion and the perchlorate ion are represented by:
Answer
  • PO4-3, NH4+, ClO3-
  • PO3-2, NH3+, ClO2-
  • PO4-3, NH4+, ClO4-
  • PO4-2, NH4+, ClO4-

Question 12

Question
The formula for potassium sulfide is:
Answer
  • KS
  • KS2
  • K2SO4
  • K2S

Question 13

Question
How many atoms of Ca are there in 2.11 g of Ca?
Answer
  • 3.11 x 10^+22
  • 8.75 x 10^-26
  • 1.27 x 10^+24
  • 3.11 x 10^+23

Question 14

Question
Which of the following statements is true for acetic acid, C2H4O2?
Answer
  • 2 mole C2H4O2 contains 2 moles C
  • 3 mole C2H4O2 contains 8 moles H
  • 5 mole C2H4O2 contains 10 moles O
  • 1 mole C2H4O2 contains 1 moles C

Question 15

Question
How many grams of oxygen are there in 25 g of Al2O3?
Answer
  • 1.17 x 10^1 g
  • 12 g
  • 3.9 g
  • 1.2 x 10^25 g

Question 16

Question
What is the mass percentage of Cl in 1 mole C14H9Cl5?
Answer
  • 50.02%
  • 47.42%
  • 10.01%
  • 75.09%

Question 17

Question
What is the percent yield of Cu in an experiment if the actual yield is 12.01 g and the theoretical yield is 14.15 g?
Answer
  • 117.8%
  • 84.87%
  • 2.14%
  • 71.09%

Question 18

Question
A soluble molecular compound has the ability to conduct electricity.
Answer
  • True
  • False

Question 19

Question
Which of the following is(are) example(s) of a weak electrolyte?
Answer
  • a) HCl
  • b) NH3
  • c) KOH
  • d) HCN
  • e) b and c
  • f) b and d

Question 20

Question
When AgNO3 reacts with HCl the products are:
Answer
  • a) H2 (g)
  • b) nitric acid
  • c) AgCl (s)
  • d) AgCl (aq)
  • e) b and c
  • f) b and d

Question 21

Question
What is the net ionic equation when HC2H3O2 reacts with NaOH?
Answer
  • HC2H3O2(aq) + NaOH(aq) -> C2H3O2Na(aq) + H2O(l)
  • H+(aq) + OH-(aq) -> H2O(l)
  • HC2H3O2(aq) + 2OH-(aq) -> C2H3O2-(aq) + 2 H2O(l)
  • HC2H3O2(aq) + OH-(aq) -> C2H3O2-(aq) + H2O(l)

Question 22

Question
A Bronsted-Lowry acid/base reaction is best defined as:
Answer
  • a combination reaction
  • a redox reaction
  • a loss of a proton
  • a proton transfer reaction

Question 23

Question
A diprotic acid has ___ acidic protons.
Answer
  • many
  • 2
  • 3
  • 4
  • d

Question 24

Question
The gas formed when Na2S reacts with H2SO4 is:
Answer
  • SO3
  • SO2
  • H2S
  • Cl2

Question 25

Question
What are the oxidation sates of each element in KClO2?
Answer
  • K=+1, Cl=+5, O=-2
  • K=-1, Cl=+5, O=-2
  • K=+1, Cl=-5, O=-2
  • K=+1, Cl=+5, O=+2

Question 26

Question
CuCl2(aq) + Mg(s) -> MgCl2(aq) + Cu(s) is an example of a:
Answer
  • a) combination reaction
  • b) combustion reaction
  • c) displacement reaction
  • d) redox reaction
  • e) b and d
  • f) c and d

Question 27

Question
The kinetic energy of a 151 lb person with a velocity of 2.0 m/s is: (given 1lb=0.4536kg)
Answer
  • a) 1.4 x 10^2 J
  • b) 1.4 x 10^-2 kgm^2/s^2
  • c) 1.4 x 10^-2 J
  • d) 1.4 x 10^2 kgm^2/s^2
  • e) a and d
  • f) b and c

Question 28

Question
Calculate the quantity of heat required (q) to raise the temperature of a 0.103 g sample of Cu by 10.0°C given a specific heat of 0.384 J/g°C.
Answer
  • 0.0396 J
  • 03.84 J
  • 0.3955 J
  • 0.396 x 10^3 kJ
  • 0.396 J

Question 29

Question
Internal energy, U is best defined as:
Answer
  • the sum of the kinetic and potential energies of all particles making up a substance
  • the total sum of all energies contained within a system
  • positional energy
  • the energy contained within the nucleus of an atom

Question 30

Question
What is true of the relationship between the energy, the frequency and the wavelength of light:
Answer
  • as energy increases, frequency decreases and wavelength decreases
  • as energy decreases, frequency decreases and wavelength decreases
  • as energy increases, frequency increases and wavelength decreases

Question 31

Question
When an electron transitions from the n=1 to the n=4 energy level light is emitted.
Answer
  • True
  • False

Question 32

Question
Which transition below best describes the absorption of the longest possible wavelength of light?
Answer
  • n=1 to n=6
  • n=2 to n=1
  • n=7 to n=8
  • n=8 to n=7

Question 33

Question
The value of the principal quantum number is referring to:
Answer
  • the shape of an atom
  • the energy level of an electron
  • the number of electrons in an atom
  • the size of the electron

Question 34

Question
An electron having n=3 and a l=2 must be in the:
Answer
  • 3p subshell
  • 3d subshell
  • 3s subshell
  • 3f subshell

Question 35

Question
A 2p subshell contains how many orbitals?
Answer
  • 1
  • 2
  • 3
  • 5

Question 36

Question
When l=4, n must have a minimum value of :
Answer
  • 4
  • 5
  • 6
  • 1

Question 37

Question
According to the energy order building up principle which statement(s) below is never correct.
Answer
  • a) 3p fills after 3s
  • b) 4s fills before 3d
  • c) 2s fills after 1s
  • d) 5s fills before 4p
  • e) a and d
  • f) b and d

Question 38

Question
Choose the correct statement below in terms of atomic size.
Answer
  • Te<Ag<Ru<Rb<Cs
  • Ru<Ag<Te<Rb<Cs
  • Cs<Ag<Te<Rb<Cs
  • Cs<Rb<Ru<Ag<Te

Question 39

Question
Ionization energy refers to the amount of energy required to add an electron to the valence shell of a gasoline atom.
Answer
  • True
  • False

Question 40

Question
Which species would you expect to have the greatest ionization energy associated with it?
Answer
  • Al+2
  • Al+1
  • Al
  • Al+3

Question 41

Question
How many electrons are shared when the ionic compound MgS2 is formed?
Answer
  • 0
  • 2
  • 3
  • 1

Question 42

Question
Which of the following is correct in terms of ionic radii:
Answer
  • Te-2<At-1<Cl-<S-2<P-3
  • S-2<Cl-<At-1<P-3<Te-2
  • Cl-<S-2<P-3<Te-2<At-1
  • P-3<Te-2<At-1<Cl-<S-2

Question 43

Question
Which of the following would you expect to have the highest melting point?
Answer
  • BaS
  • LiCl
  • Al2O3
  • MgCl2

Question 44

Question
Which noble gas is Ca+2 isoelectronic with?
Answer
  • Ne
  • Ar
  • Kr
  • Xe

Question 45

Question
Which is the most electronegative atom?
Answer
  • Cl
  • H
  • O
  • F

Question 46

Question
Which atoms are most likely to form triple bonds?
Answer
  • C, N, O and Cl
  • C and P
  • C and O
  • C, N and S

Question 47

Question
Which bond is most polar?
Answer
  • HCl
  • HBr
  • HO
  • HI

Question 48

Question
How many resonance Lewis electron dot structures does O3 have?
Answer
  • 1
  • 2
  • 3
  • 4

Question 49

Question
Which bond would require the most energy to break?
Answer
  • H-C
  • C=C
  • C≡C
  • C-C

Question 50

Question
The molecule CO2 is a polar molecule.
Answer
  • True
  • False

Question 51

Question
Which of the following describes the bond angles if a central atom has 5 groups around it?
Answer
  • 90° and 180°
  • 90°, 120° and 180°
  • 120°
  • 90°

Question 52

Question
What is the name of the molecular geometry about the central atom in PCl3?
Answer
  • trigonal pyramidal
  • tetrahedral
  • bent
  • distorted tetrahedron

Question 53

Question
Which of the following is a nonpolar molecule?
Answer
  • KrF2
  • AsF3
  • SF2
  • CH3F

Question 54

Question
What is the hybridization about the Xe atom in XeF4?
Answer
  • sp3
  • sp
  • sp3d
  • sp3d2

Question 55

Question
Which statement below is most accurate with regard to the total number of σ and π bonds in HCOCH3?
Answer
  • 5 σ and 2 π bonds
  • 7 σ bonds
  • 6 σ and 1 π bonds
  • 1 π bond
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