Midterm Exam II

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Question #1

The name for Sn2+ is

A sulfur(II) ion

B selenium ion

C strontium(II) ion

D strontium 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 H2SO4

B H2S

C HCN

D O2

E NaOH

Question #4

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

A FALSE

B TRUE

Question #5

Potassium chlorate has the formula

A KClO

B KCl

C KClO4

D KClO3

E KClO2

Question #6

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

A oxidation-reduction

B precipitation

C reduction

D oxidation

E double-displacement

Question #7

The charge on a barium ion in its ionic compound is

A Various charges are possible.

B +3

C +1

D -1

E +2

Question #8

The correct formula for ammonium sulfate is

A NH4SO3

B NH4SO4

C (NH4)2SO3

D (NH3)2SO3

E (NH4)2SO4

Question #9

The correct name for FeO is

A iron oxide

B iron(I) oxide

C iron(III) oxide

D iron monoxide

E iron(II) oxide

Question #10

The name for NaHCO3 is

A none of these

B sodium carbonate

C sodium hydrogen carbonate (sodium bicarbonate)

D sodium(I) bicarbonate

E sodium(I) hydrogen carbonate

Question #11

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

A combustion

B oxidation-reduction and synthesis

C synthesis only

D oxidation-reduction 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 monophosphorus trichloride

C phosphorus trichloride

D triphosphorus chloride

E none of these

Question #14

Titanium(IV) oxide has the formula

A Ti4O2

B Ti(IV)O

C TiO4

D TiO2

E Ti4O

Question #15

The correct formula for the carbonate ion is

A CO42-

B CO3-

C CO32-

D CO33-

E CO4-

Question #16

Which represents the greatest mass?

A 1.0 mol Al

B 1.0 mol Cu

C all the same

D 1.0 mol Fe

E 1.0 mol Zn

Question #17

The name for Al(OH)3 is

A aluminum hydroxide

B aluminum trihydroxide

C aluminum(I) hydroxide

D monaluminum trihydroxide

E aluminum(III) 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 Pb4NO3

B PbNO3

C Pb(NO3)4

D Pb(NO3)2

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 TRUE

B FALSE

Question #21

The name of the compound NH4ClO4 is

A ammonium hypochlorate

B ammonium chlorite

C ammonium chlorate

D ammonium perchlorate

E ammonium chloride

Question #22

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

A NH4SO4

B (NH4)2SO4

C NH4(SO4)2

D (NH4)3SO4

E none of these

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 FALSE

B TRUE

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 6

B 2

C 1

D 4

E 3

Question #26

The name for NH4Br is

A none of these

B nitrogen hydrogen bromide

C ammonium(I) bromide

D ammonium bromide

E nitrogen tetrahydrogen bromide

Question #27

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

A Na2(CO3)2

B Na2CO3

C Na(CO3)2

D Na3(CO)2

F NaCO3

Question #28

The substance ClO3- is best described as

A a polyatomic ion

B a polyatomic molecule

C a molecule

D a mixture

Question #29

Which of the following represents the hypochlorite ion?

A ClO3-

B ClO2-

C ClO-

D ClO4-

E Cl-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Al

B all the same

C 50.0 g Zn

D 50.0 g Fe

E 50.0 g Cu

Question #31

The correct name for the Al3+ species is

A trialuminum ion

B aluminum

C aluminum(3A) ion

D aluminum(III) ion

E aluminum ion

Question #32

What is the formula for cobalt(II) chloride?

A Co2Cl

B C2Cl

C CoCl2

D CoCl

E CCl2

Question #33

The correct name for LiCl is

A lithium(I) chloride

B lithium chloride

C monolithium monochloride

D lithium monochloride

E monolithium chloride

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 6

B 1

C 5

D 2

E 4

Question #35

Which of the following formulas is incorrect?

A AlCl3

B Li2S

C Mg(OH)2

D NaBr

E CsCl2

Question #36

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

A combustion

B decomposition

C synthesis

D oxidation

E none of the above

Question #37

The correct name for P2O5 is

A phosphorus(V) oxide

B phosphorus(II) oxide

C diphosphorus pentoxide

D phosphorus pentoxide

E diphosphorus oxide

Question #38

The correct formula for iron(III) phosphide is

A Fe3P2

B Fe3P

C Fe2P3

D FeP3

E FeP

Question #39

The correct formula for lead(II) sulfite is

A LSO4

B PbSO4

C L2SO4

D Pb2SO3

E PbSO3

Question #40

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

A 180.16 g/mol

B none of these

C 6.02 × 1023 g/mol

D 168.06 g/mol

E 108.10 g/mol

Question #41

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

A 4.05

B 1.3 × 10–23

C 7.6 × 1022

D 4.8 × 1024

E 253

Question #42

True or false? Oxidation and reduction must occur simultaneously.

A FALSE

B TRUE

Question #43

Sodium chlorite has the formula

A NaClO3

B NaCl

C NaClO2

D NaClO

E NaClO4

Question #44

The formula for calcium hydrogen sulfate is

A Ca2HSO4

B Ca(HSO4)2

C CaS2

D Ca2S

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 14

B 10

C 8

D 4

E 7

Question #46

The name for SrCl2 is

A strontium dichloride

B strontium chloride

C strontium(I) chloride(II)

D strontium(I) chloride

E strontium(II) chloride

Question #47

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

A synthesis

B none are correct

C oxidation-reduction

D combustion

E oxidation-reduction, combustion, synthesis

Question #48

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

A 1

B 4

C 3

D 2

E 0

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