Midterm Exam II

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Question #1

The name for Sn2+ is

A strontium(II) ion

B tin(II) ion

C sulfur(II) ion

D strontium ion

E selenium ion

Question #2

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

A TRUE

B FALSE

Question #3

Which of the following is a binary compound?

A NaOH

B O2

C HCN

D H2S

E H2SO4

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 KClO2

C KCl

D KClO3

E KClO4

Question #6

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

A precipitation

B double-displacement

C oxidation

D oxidation-reduction

E reduction

Question #7

The charge on a barium ion in its ionic compound is

A +3

B -1

C +2

D +1

E Various charges are possible.

Question #8

The correct formula for ammonium sulfate is

A (NH4)2SO4

B NH4SO4

C NH4SO3

D (NH4)2SO3

E (NH3)2SO3

Question #9

The correct name for FeO is

A iron monoxide

B iron(I) oxide

C iron oxide

D iron(III) oxide

E iron(II) oxide

Question #10

The name for NaHCO3 is

A sodium(I) hydrogen carbonate

B sodium(I) bicarbonate

C sodium hydrogen carbonate (sodium bicarbonate)

D sodium carbonate

E none of these

Question #11

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

A synthesis only

B combustion

C oxidation-reduction and synthesis

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 FALSE

B TRUE

Question #13

The binary compound PCl3 is called

A phosphorus chloride

B none of these

C monophosphorus trichloride

D phosphorus trichloride

E triphosphorus chloride

Question #14

Titanium(IV) oxide has the formula

A TiO2

B Ti(IV)O

C Ti4O2

D TiO4

E Ti4O

Question #15

The correct formula for the carbonate ion is

A CO32-

B CO42-

C CO33-

D CO3-

E CO4-

Question #16

Which represents the greatest mass?

A all the same

B 1.0 mol Zn

C 1.0 mol Al

D 1.0 mol Fe

E 1.0 mol Cu

Question #17

The name for Al(OH)3 is

A aluminum(III) hydroxide

B monaluminum trihydroxide

C aluminum hydroxide

D aluminum trihydroxide

E aluminum(I) hydroxide

Question #18

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

A 1.008

B 6.022×1023

C 32.00

D 12.01

E 1.66×10-24

Question #19

The correct formula for lead(IV) nitrate is

A Pb2(NO3)4

B Pb4NO3

C Pb(NO3)2

D Pb(NO3)4

E PbNO3

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 chlorite

B ammonium chlorate

C ammonium perchlorate

D ammonium hypochlorate

E ammonium chloride

Question #22

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

A (NH4)3SO4

B NH4(SO4)2

C NH4SO4

D (NH4)2SO4

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 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 2

B 3

C 1

D 6

E 4

Question #26

The name for NH4Br is

A nitrogen hydrogen bromide

B ammonium(I) bromide

C ammonium bromide

D none of these

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 Na(CO3)2

D Na3(CO)2

E NaCO3

F Na2CO3

Question #28

The substance ClO3- is best described as

A a mixture

B a polyatomic molecule

C a molecule

D a polyatomic ion

Question #29

Which of the following represents the hypochlorite ion?

A Cl-

B ClO2-

C ClO3-

D ClO4-

E ClO-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Al

B 50.0 g Fe

C all the same

D 50.0 g Zn

E 50.0 g Cu

Question #31

The correct name for the Al3+ species is

A aluminum(III) ion

B aluminum(3A) ion

C aluminum

D aluminum ion

E trialuminum ion

Question #32

What is the formula for cobalt(II) chloride?

A CoCl2

B CoCl

C C2Cl

D CCl2

E Co2Cl

Question #33

The correct name for LiCl is

A monolithium monochloride

B monolithium chloride

C lithium chloride

D lithium(I) 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 4

B 2

C 1

D 5

E 6

Question #35

Which of the following formulas is incorrect?

A Li2S

B Mg(OH)2

C CsCl2

D AlCl3

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 phosphorus pentoxide

B diphosphorus oxide

C phosphorus(V) oxide

D diphosphorus pentoxide

E phosphorus(II) oxide

Question #38

The correct formula for iron(III) phosphide is

A Fe3P

B Fe2P3

C FeP

D Fe3P2

E FeP3

Question #39

The correct formula for lead(II) sulfite is

A Pb2SO3

B PbSO4

C LSO4

D L2SO4

E PbSO3

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 168.06 g/mol

D 108.10 g/mol

E 180.16 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 253

D 7.6 × 1022

E 1.3 × 10–23

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 NaClO

C NaClO2

D NaClO4

E NaClO3

Question #44

The formula for calcium hydrogen sulfate is

A Ca2S

B Ca(SO4)2

C Ca2HSO4

D CaS2

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 8

B 14

C 10

D 7

E 4

Question #46

The name for SrCl2 is

A strontium(I) chloride(II)

B strontium chloride

C strontium dichloride

D strontium(II) chloride

E strontium(I) chloride

Question #47

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

A oxidation-reduction, combustion, synthesis

B none are correct

C 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 1

B 3

C 4

D 2

E 0

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