Midterm Exam II

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Question #1

The name for Sn2+ is

A strontium ion

B selenium ion

C sulfur(II) ion

D strontium(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 H2SO4

B NaOH

C O2

D H2S

E HCN

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 KClO4

B KClO

C KClO3

D KCl

E KClO2

Question #6

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

A reduction

B precipitation

C oxidation-reduction

D oxidation

E double-displacement

Question #7

The charge on a barium ion in its ionic compound is

A +2

B -1

C +3

D +1

E Various charges are possible.

Question #8

The correct formula for ammonium sulfate is

A (NH4)2SO4

B (NH4)2SO3

C NH4SO4

D (NH3)2SO3

E NH4SO3

Question #9

The correct name for FeO is

A iron(II) oxide

B iron(I) oxide

C iron oxide

D iron monoxide

E iron(III) oxide

Question #10

The name for NaHCO3 is

A sodium hydrogen carbonate (sodium bicarbonate)

B sodium(I) hydrogen carbonate

C none of these

D sodium(I) bicarbonate

E sodium carbonate

Question #11

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

A combustion

B oxidation-reduction and synthesis

C oxidation-reduction only

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 FALSE

B TRUE

Question #13

The binary compound PCl3 is called

A phosphorus trichloride

B phosphorus chloride

C none of these

D triphosphorus chloride

E monophosphorus trichloride

Question #14

Titanium(IV) oxide has the formula

A TiO4

B Ti4O

C Ti4O2

D Ti(IV)O

E TiO2

Question #15

The correct formula for the carbonate ion is

A CO32-

B CO4-

C CO3-

D CO33-

E CO42-

Question #16

Which represents the greatest mass?

A 1.0 mol Fe

B 1.0 mol Al

C all the same

D 1.0 mol Cu

E 1.0 mol Zn

Question #17

The name for Al(OH)3 is

A monaluminum trihydroxide

B aluminum trihydroxide

C aluminum hydroxide

D aluminum(I) hydroxide

E aluminum(III) hydroxide

Question #18

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

A 32.00

B 1.66×10-24

C 1.008

D 6.022×1023

E 12.01

Question #19

The correct formula for lead(IV) nitrate is

A PbNO3

B Pb4NO3

C Pb(NO3)2

D Pb2(NO3)4

E Pb(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 perchlorate

B ammonium chloride

C ammonium chlorate

D ammonium chlorite

E ammonium hypochlorate

Question #22

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

A (NH4)3SO4

B NH4SO4

C none of these

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 ammonium(I) bromide

B nitrogen hydrogen bromide

C none of these

D nitrogen tetrahydrogen bromide

E ammonium bromide

Question #27

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

A Na2CO3

C Na2(CO3)2

D Na3(CO)2

E NaCO3

F Na(CO3)2

Question #28

The substance ClO3- is best described as

A a polyatomic ion

B a mixture

C a polyatomic molecule

D a molecule

Question #29

Which of the following represents the hypochlorite ion?

A ClO3-

B Cl-

C ClO2-

D ClO4-

E ClO-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Fe

B 50.0 g Al

C 50.0 g Cu

D all the same

E 50.0 g Zn

Question #31

The correct name for the Al3+ species is

A aluminum(3A) ion

B aluminum

C aluminum(III) ion

D aluminum ion

E trialuminum ion

Question #32

What is the formula for cobalt(II) chloride?

A C2Cl

B CoCl2

C CoCl

D Co2Cl

E CCl2

Question #33

The correct name for LiCl is

A lithium chloride

B monolithium monochloride

C lithium(I) chloride

D monolithium 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 4

C 1

D 2

E 6

Question #35

Which of the following formulas is incorrect?

A CsCl2

B Mg(OH)2

C NaBr

D Li2S

E AlCl3

Question #36

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

A decomposition

B oxidation

C combustion

D synthesis

E none of the above

Question #37

The correct name for P2O5 is

A diphosphorus pentoxide

B diphosphorus oxide

C phosphorus pentoxide

D phosphorus(II) oxide

E phosphorus(V) oxide

Question #38

The correct formula for iron(III) phosphide is

A Fe3P2

B Fe3P

C FeP

D FeP3

E Fe2P3

Question #39

The correct formula for lead(II) sulfite is

A PbSO4

B LSO4

C PbSO3

D Pb2SO3

E L2SO4

Question #40

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

A none of these

B 6.02 × 1023 g/mol

C 108.10 g/mol

D 180.16 g/mol

E 168.06 g/mol

Question #41

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

A 4.05

B 253

C 7.6 × 1022

D 1.3 × 10–23

E 4.8 × 1024

Question #42

True or false? Oxidation and reduction must occur simultaneously.

A TRUE

B FALSE

Question #43

Sodium chlorite has the formula

A NaClO2

B NaClO

C NaClO3

D NaClO4

E NaCl

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 4

B 8

C 7

D 10

E 14

Question #46

The name for SrCl2 is

A strontium chloride

B strontium dichloride

C strontium(I) chloride(II)

D strontium(II) chloride

E strontium(I) chloride

Question #47

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

A synthesis

B combustion

C oxidation-reduction

D none are correct

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 3

B 2

C 0

D 4

E 1

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