Cem 61021 | Course Paper

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List all the intermolecular forces present in pure acetone.

A.hydrogen bonding only

B.dipole-dipole force only

C.dipole-dipole force and induced dipole/induced dipole force

D.hydrogen bonding and induced dipole/induced dipole force

E.hydrogen bonding, dipole-dipole force, and induced dipole/induced dipole force

All of the following metals are generally found in nature as either oxides or sulfides,

EXCEPT ____.

A.Fe

B.Au

C.Ni

D.Cr

E.Hg

Which one of the following atoms is paramagnetic in the ground electronic state?

A.Mg

B.Cd

C.Ar

D.Bi

E.He

What is the balanced chemical equation for the combustion of 4-methyl-1-pentene?

A.2 C5H10(g) + 15 O2(g) 10 CO2(g) + 10 H2O( )

B.2 C4H10(g) + 13 O2(g) 8 CO2(g) + 10 H2O( )

C.C4H8(g) + 6 O2(g) 4 CO2(g) + 4 H2O( )

D.C6H12(g) + 9 O2(g) 6 CO2(g) + 6 H2O( )

E.C5H12(g) + 13 O2(g) 5 CO2 (g) + 6 H2O( )

Convert 618 mm Hg to kPa. (1 atm = 760 mm Hg = 101.3 kPa)

A.0.0121 kPa

B.1.23 kPa

C.0.813 kPa

D.82.4 kPa

E.4.64 103 kPa

What is the correct formula for cobalt(III) bromide?

A.CoBr

B.CoBr3

C.Co2Br3

D.Co3Br2

E.Co3Br

Given that

S(g) + O2(g) SO2(g) DrG = “300.1 kJ/mol-rxn

2 S(g) + 3 O2(g) 2 SO3(g) DrG = “742.1 kJ/mol-rxn

calculate DfG of the following reaction:

SO2(g) + 1/2 O2(g) SO3(g)

A.”1042.2 kJ/mol-rxn

B.”71.0 kJ/mol-rxn

C.+2.47 kJ/mol-rxn

D.+71.0 kJ/mol-rxn

E.+1042.2 kJ/mol-rxn

Lithium chloride crystallizes in a face-centered cubic unit cell with chloride ions

occupying the lattice points and lithium ions occupying octahedral holes. How many

chloride ions surround each lithium ion in LiCl?

A.1

B.4

C.6

D.8

E.12

Which of the following molecules might be a cycloalkane?

A.C3H4

B.C4H10

C.C5H12

D.C6H10

E.C7H14

The density of ice at 0 C is 0.917 g/mL. What is the volume of 125 g of ice?

A.0.00734 mL

B.115 mL

C.124 mL

D.126 mL

E.136 mL

Write a balanced half-reaction for the reduction of CrO4

2″(aq) to Cr(OH)3(s) in a basic

solution.

A.CrO4

2″(aq) + 3 OH“(aq) + 3 e“ Cr(OH)3(s) + 2 O2(g)

B.CrO4

2″(aq) + 3 H+(aq) + 3 e“ Cr(OH)3(s)

C.CrO4

2″(aq) + 3 H+(aq) Cr(OH)3(s) + 2 e“

D.CrO4

2″(aq) + 4 H2O( ) + 3 e“ Cr(OH)3(s) + 5 OH“(aq)

E.CrO4

2″(aq) + 3 OH“(aq) Cr(OH)3(s) + 2 O2(g)

The dimensions of a box are 1.2 feet by 0.50 feet by 0.75 feet. Calculate the volume of

the box in cubic centimeters. (2.54 cm = 1.00 inch, 12.0 inches = 1.00 foot)

A.14 cm3

B.47 cm3

C.306 cm3

D.418 cm3

E.1.3 104 cm3

Which one of the following conditions is always true for a titration of a weak acid with

a strong base?

A.A colored indicator with a pKa less than 7 should be used.

B.If a colored indicator is used, it must change color rapidly in the weak acid’s buffer

region.

C.Equal volumes of weak acid and strong base are required to reach the equivalence

point.

D.The equivalence point occurs at a pH equal to 7.

E.The equivalence point occurs at a pH greater than 7.

Write a balanced chemical equation for the reaction of lime and water to form slaked

lime.

A.CaO(s) + 2 H2O( ) CaCO3(s) + 2 H2(g)

B.CaO(s) + H2O( ) Ca(OH)2(s)

C.Ca3(PO4)2(s) + 2 H2O( ) 2 CaHPO4(aq) + Ca(OH)2(aq)

D.CaCO3(s) + H2O( ) Ca(s) + H3O+(aq) + CO2(g)

E.CaCO3(s) + H2O( ) CaO(s) + H2CO3(aq)

Which of the following species have geometric isomers: [Fe(en)Cl4]“, [Fe(en)2Cl2]+,

and [Fe(en)2BrCl]+?

A.[Fe(en)Cl4]“ only

B.[Fe(en)2Cl2]+ only

C.[Fe(en)2BrCl]+ only

D.[Fe(en)2Cl2]+ and [Fe(en)2BrCl]+

E.[Fe(en)Cl4]“, [Fe(en)2Cl2]+, and [Fe(en)2BrCl]+

Calculate the energy released (per mole of deuterium consumed) for the following

fusion reaction,

given the following molar masses of nucleons and nuclei. (c = 2.998 108 m/s)

particle mass (g/mol)

proton 1.007825

neutron 1.008665

deuterium 2.0140

tritium 3.01605

helium-4 4.00260

A.5.63 106 J/mol

B.1.69 1015 J/mol

C.4.62 1013 J/mol

D.8.44 1011 J/mol

E.1.69 1012 J/mol

What is the molecular geometry around a central atom that is sp3 hybridized and has

one lone pair of electrons?

A.bent

B.linear

C.trigonal-planar

D.trigonal-pyramidal

E.trigonal-bipyramidal

What is the name of the compound having the formula (NH4)2[Cu(CN)4]?

A.ammonium tetracyanocuprate(II)

B.diammonium tetracyanocuprate(II)

C.bisamminetetracyanocuprate(II)

D.tetracyanobisamminecuprate(II)

E.tetracyanocuprate(II) ammonia

Write a balanced chemical equation for the reaction of aqueous solutions of sodium

sulfide and zinc(II) chloride.

A.Na2S(aq) + ZnCl2(aq) ZnS(s) + 2 NaCl(aq)

B.Na2S(aq) + ZnCl2(aq) ZnS(s) + 2 NaCl(s)

C.Na2S(aq) + ZnCl2(aq) Na2Zn(s) + SCl2(aq)

D.Na2S(aq) + ZnCl2(aq) Na2Zn(aq) + SCl2(g)

E.No reaction occurs.

What is the correct orbital box diagram for the ground state electron configuration of

Ni?

The Arrhenius equation, , relates the rate constant of reaction and

temperature. A plot of ____ versus 1/T will yield a straight line with a slope of “Ea/R.

A.k2/k1

B.”Ea

C.ln(k)

E.1/RT

Which of the following statements is/are CORRECT?

1/ Ionic bonds form when one or more valence electrons are transferred from one atom

to another.

2/ Covalent bonds involve sharing of electrons between atoms.

3/ In most covalently bonded compounds, electrons are NOT shared equally between

the atoms.

A.1 only

B.2 only

C.3 only

D.1 and 2

E.1, 2, and 3

What is the correct name for NH4NO3?

A.ammonia hydrogen nitrate

B.ammonia hydrogen nitride

C.ammonium nitric acid

D.ammonium nitrate

E.ammonium nitride

What is the pH of the solution which results from mixing 75 mL of 0.50 M NH3(aq)

and 75 mL of 0.50 HCl(aq) at 25 C? (Kb for NH3 = 1.8 10“5)

A.0.60

B.2.67

C.4.74

D.4.93

E.9.26

Which of the following statements is/are CORRECT?

1/ Polyethylene forms by the addition reaction of C2H4 molecules.

2/ Copolymers form by the polymerization of two (or more) different monomers.

3/ A condensation reaction involves reacting two monomers and splitting out a small

molecule, often water.

A.1 only

B.2 only

C.3 only

D.1 and 3

E.1, 2, and 3

Which of the following compounds are soluble in water: NH4NO3, Fe2S3, CuCO3, and

SrCl2?

A.NH4NO3 only

B.NH4NO3 and Fe2S3

C.Fe2S3 and CuCO3

D.CuCO3 and SrCl2

E.NH4NO3 and SrCl2

The unit for electromotive force, emf, is the Volt. A Volt is equal to

A.one joule per second.

B.one coulomb per joule.

C.one joule per coulomb.

D.one coulomb per second.

E.one second per joule.

What is the correct answer to the following expression: 5.23 10“7 – 8.30 10“9?

A.5 10“7

B.5.2 10“7

C.5.15 10“7

D.5.147 10“7

E.5.1470 10“7

What is the maximum number of electrons that can occupy the n = 5 shell?

A.10

B.16

C.25

D.32

E.50

Determine the number of unpaired electrons in an octahedral, high-spin Cr(II) complex.

A.1

B.2

C.3

D.4

E.5