Midterm Exam II

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Question #1

The name for Sn2+ is

A selenium ion

B strontium ion

C strontium(II) ion

D sulfur(II) ion

E tin(II) ion

Question #2

True or false? One atomic mass unit (amu) is the mass (in grams) of one mole of the substance.

A FALSE

B TRUE

Question #3

Which of the following is a binary compound?

A O2

B H2SO4

C HCN

D NaOH

E H2S

Question #4

True or false? In naming ionic compounds, the cation is always named first and the anion second.

A TRUE

B FALSE

Question #5

Potassium chlorate has the formula

A KClO

B KClO2

C KClO3

D KCl

E KClO4

Question #6

A reaction that involves a transfer of electrons is called a(n) ______________ reaction.

A precipitation

B reduction

C oxidation

D double-displacement

E oxidation-reduction

Question #7

The charge on a barium ion in its ionic compound is

A +1

B Various charges are possible.

C -1

D +3

E +2

Question #8

The correct formula for ammonium sulfate is

A NH4SO3

B (NH3)2SO3

C (NH4)2SO4

D NH4SO4

E (NH4)2SO3

Question #9

The correct name for FeO is

A iron oxide

B iron(III) oxide

C iron monoxide

D iron(II) oxide

E iron(I) oxide

Question #10

The name for NaHCO3 is

A none of these

B sodium(I) hydrogen carbonate

C sodium hydrogen carbonate (sodium bicarbonate)

D sodium carbonate

E sodium(I) bicarbonate

Question #11

The equation 2Al(s) + 2Br2(l) → 2AlBr3(s) is a(n) ______________ reaction.

A oxidation-reduction and synthesis

B oxidation-reduction only

C combustion

D synthesis only

E decomposition

Question #12

True or false? A mole ratio is used to convert the moles of a starting substance to the moles of a desired substance.

A TRUE

B FALSE

Question #13

The binary compound PCl3 is called

A phosphorus chloride

B triphosphorus chloride

C none of these

D phosphorus trichloride

E monophosphorus trichloride

Question #14

Titanium(IV) oxide has the formula

A Ti4O

B Ti4O2

C TiO2

D TiO4

E Ti(IV)O

Question #15

The correct formula for the carbonate ion is

A CO4-

B CO42-

C CO3-

D CO33-

E CO32-

Question #16

Which represents the greatest mass?

A 1.0 mol Zn

B all the same

C 1.0 mol Al

D 1.0 mol Cu

E 1.0 mol Fe

Question #17

The name for Al(OH)3 is

A aluminum hydroxide

B aluminum(III) hydroxide

C aluminum trihydroxide

D monaluminum trihydroxide

E aluminum(I) hydroxide

Question #18

One mole of something consists of ____________ units of that substance.

A 12.01

B 32.00

C 1.008

D 1.66×10-24

E 6.022×1023

Question #19

The correct formula for lead(IV) nitrate is

A Pb(NO3)4

B PbNO3

C Pb(NO3)2

D Pb4NO3

E Pb2(NO3)4

Question #20

True or false? A sample of an element with a mass equal to that element’s average atomic mass expressed in grams contains one mole of atoms.

A FALSE

B TRUE

Question #21

The name of the compound NH4ClO4 is

A ammonium hypochlorate

B ammonium perchlorate

C ammonium chloride

D ammonium chlorite

E ammonium chlorate

Question #22

The formula for the compound formed from ammonium and sulfate ions is

A NH4SO4

B none of these

C (NH4)3SO4

D (NH4)2SO4

E NH4(SO4)2

Question #23

True or false? A balanced chemical equation is one that has the same number of moles of molecules on each side of the equation.

A FALSE

B TRUE

Question #24

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 #25

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case?
Reference: Ref 6-2

N2(g) + O2(g) → N2O3

A 4

B 1

C 6

D 2

E 3

Question #26

The name for NH4Br is

A nitrogen tetrahydrogen bromide

B ammonium(I) bromide

C nitrogen hydrogen bromide

D none of these

E ammonium bromide

Question #27

The carbonate ion has the formula CO32-. What is the correct formula for sodium carbonate?

B Na3(CO)2

C Na2CO3

D Na2(CO3)2

E Na(CO3)2

F NaCO3

Question #28

The substance ClO3- is best described as

A a polyatomic molecule

B a polyatomic ion

C a mixture

D a molecule

Question #29

Which of the following represents the hypochlorite ion?

A ClO4-

B Cl-

C ClO3-

D ClO-

E ClO2-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Zn

B all the same

C 50.0 g Cu

D 50.0 g Al

E 50.0 g Fe

Question #31

The correct name for the Al3+ species is

A aluminum

B aluminum(3A) ion

C aluminum(III) ion

D aluminum ion

E trialuminum ion

Question #32

What is the formula for cobalt(II) chloride?

A CCl2

B Co2Cl

C CoCl2

D CoCl

E C2Cl

Question #33

The correct name for LiCl is

A monolithium monochloride

B monolithium chloride

C lithium(I) chloride

D lithium chloride

E lithium monochloride

Question #34

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case?
Reference: Ref 6-2

Pb(s) + AgNO3(aq) → Pb(NO3)2 + Ag(s)

A 5

B 2

C 6

D 4

E 1

Question #35

Which of the following formulas is incorrect?

A AlCl3

B CsCl2

C Mg(OH)2

D Li2S

E NaBr

Question #36

The equation 2Ag2O(s) → 4Ag(s) + O2(g) is a(n) ______________ reaction.

A combustion

B decomposition

C oxidation

D synthesis

E none of the above

Question #37

The correct name for P2O5 is

A diphosphorus oxide

B phosphorus(II) oxide

C phosphorus(V) oxide

D phosphorus pentoxide

E diphosphorus pentoxide

Question #38

The correct formula for iron(III) phosphide is

A Fe3P2

B FeP

C Fe3P

D FeP3

E Fe2P3

Question #39

The correct formula for lead(II) sulfite is

A LSO4

B Pb2SO3

C PbSO3

D PbSO4

E L2SO4

Question #40

The molar mass of blood sugar, C6H12O6, also known as glucose and dextrose, is

A 168.06 g/mol

B none of these

C 180.16 g/mol

D 6.02 × 1023 g/mol

E 108.10 g/mol

Question #41

How many molecules of O2 are there in 7.9 mol of O2?

A 4.8 × 1024

B 4.05

C 1.3 × 10–23

D 253

E 7.6 × 1022

Question #42

True or false? Oxidation and reduction must occur simultaneously.

A FALSE

B TRUE

Question #43

Sodium chlorite has the formula

A NaClO

B NaClO3

C NaClO4

D NaClO2

E NaCl

Question #44

The formula for calcium hydrogen sulfate is

A CaS2

B Ca2S

C Ca(HSO4)2

D Ca2HSO4

E Ca(SO4)2

Question #45

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case?
Reference: Ref 6-2

C2H6(g) + O2(g) → CO2(g) + H2O(g)

A 10

B 8

C 4

D 7

E 14

Question #46

The name for SrCl2 is

A strontium(II) chloride

B strontium dichloride

C strontium(I) chloride(II)

D strontium chloride

E strontium(I) chloride

Question #47

Classify the following reaction:
2Mg(s) + O2(g) → 2MgO(s)

A oxidation-reduction, combustion, synthesis

B combustion

C none are correct

D synthesis

E oxidation-reduction

Question #48

When the equation Si(s) + HF(aq) → SiF4(g) + H2(g) is balanced, what is the coefficient for HF?

A 2

B 4

C 1

D 3

E 0

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