Midterm Exam II

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Question #1

The name for Sn2+ is

A strontium(II) ion

B tin(II) ion

C selenium ion

D strontium 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 TRUE

B FALSE

Question #3

Which of the following is a binary compound?

A HCN

B NaOH

C O2

D H2S

E H2SO4

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 KClO3

B KClO4

C KClO

D KClO2

E KCl

Question #6

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

A reduction

B double-displacement

C precipitation

D oxidation

E oxidation-reduction

Question #7

The charge on a barium ion in its ionic compound is

A Various charges are possible.

B -1

C +3

D +2

E +1

Question #8

The correct formula for ammonium sulfate is

A NH4SO3

B NH4SO4

C (NH4)2SO4

D (NH3)2SO3

E (NH4)2SO3

Question #9

The correct name for FeO is

A iron(III) oxide

B iron(I) oxide

C iron(II) oxide

D iron monoxide

E iron oxide

Question #10

The name for NaHCO3 is

A sodium hydrogen carbonate (sodium bicarbonate)

B sodium carbonate

C sodium(I) bicarbonate

D sodium(I) hydrogen carbonate

E none of these

Question #11

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

A decomposition

B oxidation-reduction only

C synthesis only

D oxidation-reduction and synthesis

E combustion

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 phosphorus trichloride

C monophosphorus trichloride

D triphosphorus chloride

E none of these

Question #14

Titanium(IV) oxide has the formula

A TiO2

B Ti4O2

C Ti(IV)O

D TiO4

E Ti4O

Question #15

The correct formula for the carbonate ion is

A CO3-

B CO33-

C CO4-

D CO32-

E CO42-

Question #16

Which represents the greatest mass?

A all the same

B 1.0 mol Fe

C 1.0 mol Cu

D 1.0 mol Al

E 1.0 mol Zn

Question #17

The name for Al(OH)3 is

A aluminum(I) hydroxide

B aluminum trihydroxide

C aluminum hydroxide

D aluminum(III) hydroxide

E monaluminum trihydroxide

Question #18

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

A 32.00

B 1.008

C 1.66×10-24

D 12.01

E 6.022×1023

Question #19

The correct formula for lead(IV) nitrate is

A PbNO3

B Pb2(NO3)4

C Pb4NO3

D Pb(NO3)2

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 chlorate

B ammonium hypochlorate

C ammonium chloride

D ammonium chlorite

E ammonium perchlorate

Question #22

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

A NH4(SO4)2

B NH4SO4

C (NH4)2SO4

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 4

B 1

C 2

D 6

E 3

Question #26

The name for NH4Br is

A ammonium(I) bromide

B nitrogen hydrogen bromide

C none of these

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 Na2CO3

B Na2(CO3)2

C Na3(CO)2

D NaCO3

E 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 Cl-

B ClO-

C ClO2-

D ClO3-

E ClO4-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Zn

B 50.0 g Al

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 trialuminum ion

B aluminum(III) ion

C aluminum(3A) ion

D aluminum ion

E aluminum

Question #32

What is the formula for cobalt(II) chloride?

A C2Cl

B CoCl

C Co2Cl

D CoCl2

E CCl2

Question #33

The correct name for LiCl is

A lithium chloride

B lithium(I) chloride

C monolithium chloride

D monolithium monochloride

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 NaBr

D CsCl2

E AlCl3

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 pentoxide

B phosphorus(II) oxide

C phosphorus(V) oxide

D diphosphorus oxide

E diphosphorus pentoxide

Question #38

The correct formula for iron(III) phosphide is

A FeP3

B Fe2P3

C FeP

D Fe3P2

E Fe3P

Question #39

The correct formula for lead(II) sulfite is

A LSO4

B Pb2SO3

C L2SO4

D PbSO3

E PbSO4

Question #40

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

A 168.06 g/mol

B none of these

C 108.10 g/mol

D 6.02 × 1023 g/mol

E 180.16 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 253

D 7.6 × 1022

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 NaClO

B NaClO4

C NaCl

D NaClO2

E NaClO3

Question #44

The formula for calcium hydrogen sulfate is

A Ca(SO4)2

B Ca2S

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

B strontium(I) chloride(II)

C strontium chloride

D strontium dichloride

E strontium(II) chloride

Question #47

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

A oxidation-reduction

B none are correct

C combustion

D oxidation-reduction, combustion, synthesis

E 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 0

C 3

D 1

E 2

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