Midterm Exam II

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Question #1

The name for Sn2+ is

A tin(II) ion

B strontium ion

C sulfur(II) ion

D selenium ion

E strontium(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 H2S

C NaOH

D H2SO4

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 KClO2

C KClO

D KClO3

E KCl

Question #6

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

A oxidation-reduction

B double-displacement

C reduction

D precipitation

E oxidation

Question #7

The charge on a barium ion in its ionic compound is

A -1

B +1

C Various charges are possible.

D +2

E +3

Question #8

The correct formula for ammonium sulfate is

A NH4SO3

B (NH4)2SO3

C NH4SO4

D (NH3)2SO3

E (NH4)2SO4

Question #9

The correct name for FeO is

A iron(I) oxide

B iron(III) oxide

C iron oxide

D iron monoxide

E iron(II) oxide

Question #10

The name for NaHCO3 is

A sodium(I) bicarbonate

B none of these

C sodium hydrogen carbonate (sodium bicarbonate)

D sodium(I) hydrogen carbonate

E sodium carbonate

Question #11

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

A oxidation-reduction only

B decomposition

C combustion

D oxidation-reduction and synthesis

E synthesis only

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 monophosphorus trichloride

C triphosphorus chloride

D phosphorus chloride

E none of these

Question #14

Titanium(IV) oxide has the formula

A TiO2

B Ti(IV)O

C Ti4O2

D Ti4O

E TiO4

Question #15

The correct formula for the carbonate ion is

A CO3-

B CO42-

C CO4-

D CO33-

E CO32-

Question #16

Which represents the greatest mass?

A 1.0 mol Zn

B 1.0 mol Al

C all the same

D 1.0 mol Fe

E 1.0 mol Cu

Question #17

The name for Al(OH)3 is

A aluminum(I) hydroxide

B aluminum trihydroxide

C monaluminum trihydroxide

D aluminum(III) hydroxide

E aluminum hydroxide

Question #18

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

A 6.022×1023

B 1.66×10-24

C 32.00

D 12.01

E 1.008

Question #19

The correct formula for lead(IV) nitrate is

A PbNO3

B Pb(NO3)4

C Pb4NO3

D Pb2(NO3)4

E Pb(NO3)2

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 hypochlorate

C ammonium chlorite

D ammonium chloride

E ammonium chlorate

Question #22

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

A (NH4)2SO4

B NH4(SO4)2

C none of these

D (NH4)3SO4

E NH4SO4

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 TRUE

B FALSE

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 6

B 4

C 1

D 3

E 2

Question #26

The name for NH4Br is

A nitrogen hydrogen bromide

B nitrogen tetrahydrogen bromide

C none of these

D ammonium bromide

E ammonium(I) bromide

Question #27

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

A Na3(CO)2

B Na(CO3)2

C Na2(CO3)2

E NaCO3

F Na2CO3

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 ClO4-

B ClO2-

C ClO3-

D Cl-

E ClO-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Zn

B 50.0 g Cu

C 50.0 g Al

D all the same

E 50.0 g Fe

Question #31

The correct name for the Al3+ species is

A aluminum

B aluminum(3A) ion

C aluminum ion

D trialuminum ion

E aluminum(III) ion

Question #32

What is the formula for cobalt(II) chloride?

A CoCl

B CCl2

C CoCl2

D C2Cl

E Co2Cl

Question #33

The correct name for LiCl is

A lithium monochloride

B monolithium monochloride

C monolithium chloride

D lithium chloride

E lithium(I) 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 2

B 5

C 4

D 6

E 1

Question #35

Which of the following formulas is incorrect?

A CsCl2

B Mg(OH)2

C AlCl3

D NaBr

E Li2S

Question #36

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

A synthesis

B decomposition

C combustion

D oxidation

E none of the above

Question #37

The correct name for P2O5 is

A phosphorus(V) oxide

B phosphorus pentoxide

C phosphorus(II) oxide

D diphosphorus oxide

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 Pb2SO3

B LSO4

C PbSO4

D L2SO4

E PbSO3

Question #40

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

A 108.10 g/mol

B 180.16 g/mol

C 6.02 × 1023 g/mol

D 168.06 g/mol

E none of these

Question #41

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

A 7.6 × 1022

B 1.3 × 10–23

C 4.05

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 NaCl

B NaClO4

C NaClO

D NaClO2

E NaClO3

Question #44

The formula for calcium hydrogen sulfate is

A CaS2

B Ca2S

C Ca(SO4)2

D Ca2HSO4

E Ca(HSO4)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 4

C 7

D 14

E 8

Question #46

The name for SrCl2 is

A strontium(I) chloride

B strontium chloride

C strontium dichloride

D strontium(II) chloride

E strontium(I) chloride(II)

Question #47

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

A combustion

B synthesis

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 4

B 2

C 0

D 3

E 1

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