Midterm Exam II

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Question #1

The name for Sn2+ is

A strontium(II) ion

B selenium ion

C sulfur(II) ion

D strontium 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 H2S

B O2

C H2SO4

D NaOH

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 KClO2

B KCl

C KClO3

D KClO4

E KClO

Question #6

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

A reduction

B oxidation

C oxidation-reduction

D double-displacement

E precipitation

Question #7

The charge on a barium ion in its ionic compound is

A +2

B +1

C -1

D +3

E Various charges are possible.

Question #8

The correct formula for ammonium sulfate is

A (NH4)2SO3

B (NH4)2SO4

C (NH3)2SO3

D NH4SO4

E NH4SO3

Question #9

The correct name for FeO is

A iron monoxide

B iron(II) oxide

C iron(I) oxide

D iron oxide

E iron(III) oxide

Question #10

The name for NaHCO3 is

A sodium carbonate

B sodium(I) hydrogen carbonate

C none of these

D sodium(I) bicarbonate

E sodium hydrogen carbonate (sodium bicarbonate)

Question #11

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

A decomposition

B combustion

C synthesis only

D oxidation-reduction and synthesis

E oxidation-reduction 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 TRUE

B FALSE

Question #13

The binary compound PCl3 is called

A triphosphorus chloride

B phosphorus trichloride

C monophosphorus trichloride

D phosphorus chloride

E none of these

Question #14

Titanium(IV) oxide has the formula

A TiO2

B Ti(IV)O

C Ti4O

D Ti4O2

E TiO4

Question #15

The correct formula for the carbonate ion is

A CO3-

B CO33-

C CO4-

D CO42-

E CO32-

Question #16

Which represents the greatest mass?

A 1.0 mol Cu

B 1.0 mol Fe

C 1.0 mol Zn

D 1.0 mol Al

E all the same

Question #17

The name for Al(OH)3 is

A aluminum(I) hydroxide

B aluminum hydroxide

C aluminum(III) hydroxide

D aluminum trihydroxide

E monaluminum trihydroxide

Question #18

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

A 6.022×1023

B 32.00

C 12.01

D 1.008

E 1.66×10-24

Question #19

The correct formula for lead(IV) nitrate is

A Pb2(NO3)4

B Pb4NO3

C PbNO3

D Pb(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 chlorite

C ammonium hypochlorate

D ammonium chloride

E ammonium chlorate

Question #22

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

A none of these

B (NH4)2SO4

C NH4SO4

D NH4(SO4)2

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 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 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 2

C 3

D 1

E 6

Question #26

The name for NH4Br is

A none of these

B nitrogen tetrahydrogen bromide

C nitrogen hydrogen bromide

D ammonium(I) bromide

E ammonium 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 NaCO3

E Na(CO3)2

F Na3(CO)2

Question #28

The substance ClO3- is best described as

A a molecule

B a polyatomic ion

C a mixture

D a polyatomic molecule

Question #29

Which of the following represents the hypochlorite ion?

A ClO-

B ClO4-

C Cl-

D ClO2-

E ClO3-

Question #30

Which represents the greatest number of atoms?

A 50.0 g Al

B 50.0 g Zn

C all the same

D 50.0 g Fe

E 50.0 g Cu

Question #31

The correct name for the Al3+ species is

A aluminum

B aluminum(III) ion

C aluminum ion

D trialuminum ion

E aluminum(3A) 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 lithium(I) chloride

B lithium monochloride

C lithium chloride

D monolithium monochloride

E monolithium 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 5

B 4

C 2

D 6

E 1

Question #35

Which of the following formulas is incorrect?

A Mg(OH)2

B NaBr

C AlCl3

D Li2S

E CsCl2

Question #36

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

A oxidation

B synthesis

C combustion

D decomposition

E none of the above

Question #37

The correct name for P2O5 is

A phosphorus(II) oxide

B diphosphorus oxide

C diphosphorus pentoxide

D phosphorus pentoxide

E phosphorus(V) oxide

Question #38

The correct formula for iron(III) phosphide is

A FeP3

B FeP

C Fe3P2

D Fe3P

E Fe2P3

Question #39

The correct formula for lead(II) sulfite is

A PbSO4

B L2SO4

C LSO4

D Pb2SO3

E PbSO3

Question #40

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

A 108.10 g/mol

B none of these

C 168.06 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 4.8 × 1024

B 4.05

C 1.3 × 10–23

D 7.6 × 1022

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 NaClO3

B NaClO4

C NaClO2

D NaCl

E NaClO

Question #44

The formula for calcium hydrogen sulfate is

A CaS2

B Ca2HSO4

C Ca(HSO4)2

D Ca(SO4)2

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 10

B 14

C 4

D 8

E 7

Question #46

The name for SrCl2 is

A strontium dichloride

B strontium(II) chloride

C strontium chloride

D strontium(I) chloride(II)

E strontium(I) chloride

Question #47

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

A none are correct

B synthesis

C oxidation-reduction, combustion, synthesis

D oxidation-reduction

E combustion

Question #48

When the equation Si(s) + HF(aq) → SiF4(g) + H2(g) is balanced, what is the coefficient for HF?

A 0

B 2

C 4

D 3

E 1

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