Midterm Exam II

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Question #1

The name for Sn2+ is

A selenium ion

B strontium ion

C tin(II) ion

D strontium(II) ion

E sulfur(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 NaOH

B HCN

C H2SO4

D H2S

E O2

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 KClO2

B KClO

C KClO4

D KClO3

E KCl

Question #6

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

A oxidation-reduction

B precipitation

C oxidation

D reduction

E double-displacement

Question #7

The charge on a barium ion in its ionic compound is

A +2

B +1

C +3

D Various charges are possible.

E -1

Question #8

The correct formula for ammonium sulfate is

A (NH4)2SO3

B (NH3)2SO3

C NH4SO4

D NH4SO3

E (NH4)2SO4

Question #9

The correct name for FeO is

A iron oxide

B iron(I) oxide

C iron(II) oxide

D iron monoxide

E iron(III) oxide

Question #10

The name for NaHCO3 is

A none of these

B sodium(I) hydrogen carbonate

C sodium(I) bicarbonate

D sodium hydrogen carbonate (sodium bicarbonate)

E sodium carbonate

Question #11

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

A decomposition

B oxidation-reduction and synthesis

C combustion

D oxidation-reduction only

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 none of these

B monophosphorus trichloride

C triphosphorus chloride

D phosphorus chloride

E phosphorus trichloride

Question #14

Titanium(IV) oxide has the formula

A Ti(IV)O

B TiO2

C TiO4

D Ti4O

E Ti4O2

Question #15

The correct formula for the carbonate ion is

A CO33-

B CO42-

C CO32-

D CO3-

E CO4-

Question #16

Which represents the greatest mass?

A 1.0 mol Al

B all the same

C 1.0 mol Fe

D 1.0 mol Cu

E 1.0 mol Zn

Question #17

The name for Al(OH)3 is

A aluminum(III) hydroxide

B aluminum hydroxide

C aluminum trihydroxide

D aluminum(I) hydroxide

E monaluminum trihydroxide

Question #18

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

A 1.66×10-24

B 32.00

C 1.008

D 6.022×1023

E 12.01

Question #19

The correct formula for lead(IV) nitrate is

A Pb4NO3

B Pb(NO3)2

C Pb2(NO3)4

D PbNO3

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 TRUE

B FALSE

Question #21

The name of the compound NH4ClO4 is

A ammonium hypochlorate

B ammonium chlorite

C ammonium chloride

D ammonium chlorate

E ammonium perchlorate

Question #22

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

A none of these

B NH4SO4

C NH4(SO4)2

D (NH4)2SO4

E (NH4)3SO4

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 1

B 2

C 6

D 3

E 4

Question #26

The name for NH4Br is

A ammonium(I) bromide

B none of these

C nitrogen tetrahydrogen bromide

D nitrogen hydrogen bromide

E ammonium bromide

Question #27

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

A Na2CO3

B NaCO3

D Na3(CO)2

E Na2(CO3)2

F Na(CO3)2

Question #28

The substance ClO3- is best described as

A a molecule

B a polyatomic molecule

C a polyatomic ion

D a mixture

Question #29

Which of the following represents the hypochlorite ion?

A ClO4-

B ClO2-

C ClO-

D Cl-

E ClO3-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Al

B 50.0 g Zn

C 50.0 g Fe

D 50.0 g Cu

E all the same

Question #31

The correct name for the Al3+ species is

A aluminum

B aluminum(III) ion

C trialuminum ion

D aluminum(3A) ion

E aluminum ion

Question #32

What is the formula for cobalt(II) chloride?

A C2Cl

B CCl2

C CoCl

D CoCl2

E Co2Cl

Question #33

The correct name for LiCl is

A monolithium monochloride

B lithium(I) chloride

C monolithium chloride

D lithium monochloride

E lithium 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 4

C 1

D 6

E 5

Question #35

Which of the following formulas is incorrect?

A CsCl2

B Li2S

C NaBr

D AlCl3

E Mg(OH)2

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 diphosphorus pentoxide

D phosphorus(V) oxide

E phosphorus pentoxide

Question #38

The correct formula for iron(III) phosphide is

A Fe2P3

B FeP

C FeP3

D Fe3P

E Fe3P2

Question #39

The correct formula for lead(II) sulfite is

A Pb2SO3

B PbSO3

C L2SO4

D PbSO4

E LSO4

Question #40

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

A 180.16 g/mol

B 108.10 g/mol

C 6.02 × 1023 g/mol

D none of these

E 168.06 g/mol

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 TRUE

B FALSE

Question #43

Sodium chlorite has the formula

A NaClO

B NaClO2

C NaClO4

D NaCl

E NaClO3

Question #44

The formula for calcium hydrogen sulfate is

A Ca(SO4)2

B Ca(HSO4)2

C CaS2

D Ca2HSO4

E Ca2S

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 7

B 10

C 14

D 8

E 4

Question #46

The name for SrCl2 is

A strontium chloride

B strontium dichloride

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, combustion, synthesis

D combustion

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 1

C 4

D 3

E 0

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