Deck 5: Molecules and Compounds

Question 1

Give a possible molecular formula for C₃H₅ClO.

A) C₆H₁₀ClO₂
B) C₅H₁₀Cl₂O₂
C) C₆H₁₀Cl₂O₂
D) C₆H₁₀O₂
E) C₆H₁₂Cl₂O₂

Answer 1

C₆H₁₀Cl₂O₂

Question 2

Give the name for SnO.

A) tin (I) oxide
B) tin (II) oxide
C) tin (III) oxide
D) tin (IV) oxide

Answer 2

tin (II) oxide

Question 3

Give the name for HNO₃.

A) nitric acid
B) nitrous acid
C) hydrogen nitrate
D) hydrogen nitrite
E) hydrogen nitride

Answer 3

nitric acid

Question 4

What is the empirical formula for Hg₂(NO₃)₂?

A) Hg₂(NO₃)₂
B) HgNO₃
C) Hg(NO₃)₂
D) Hg₂NO₃
E) Hg₄(NO₃)₄

Question 5

Determine the name for CoCl₂^∙6H₂O.Remember that Co forms several ions.

A) cobalt chloride hydrate
B) cobalt (I) chloride heptahydrate
C) cobalt (II) chloride heptahydrate
D) cobalt (II) chloride hexahydrate
E) cobalt (I) chloride

Question 6

Write the name for Sn(SO₄)₂.Remember that Sn forms several ions.

A) tin (I) sulfite
B) tin (IV) sulfate
C) tin sulfide
D) tin (II) sulfite
E) tin (I) sulfate

Question 7

Write the formula for copper (II)sulfate pentahydrate.

A) Cu₂SO₃^∙H₅
B) Cu₂S^∙H₂O
C) CuS^∙5H₂O
D) (CuSO₄)₅
E) CuSO₄^∙5H₂O

Question 8

Give the name for KMnO₄.

A) potassium manganese tetraoxide
B) potassium manganate
C) potassium permanganate
D) potassium permagnesium
E) potassium magnesate

Question 9

Give the formula for sulfurous acid.

A) H₂SO₃
B) HSO₃
C) H₂SO₄
D) HSO₄

Question 10

Give the structure for sodium perchlorate.

A) NaClO
B) NaClO₂
C) NaClO₃
D) NaClO₄

Question 11

Give the name for NaHSO₃.

A) sodium sulfite
B) sodium sulfate
C) sodium hydrogen sulfate
D) sodium hydrogen sulfite
E) sodium sulfide

Question 12

A covalent bond is best described as

A) the sharing of electrons between atoms.
B) the transfer of electrons.
C) a bond between a metal and a nonmetal.
D) a bond between a metal and a polyatomic ion.
E) a bond between two polyatomic ions.

Question 13

Determine the name for TiCO₃.Remember that titanium forms several ions.

A) titanium (II) carbonate
B) titanium carbide
C) titanium carbonite
D) titanium (II) carbonite
E) titanium (I) carbonate

Question 14

An ionic bond is best described as

A) the sharing of electrons.
B) the transfer of electrons from one atom to another.
C) the attraction that holds the atoms together in a polyatomic ion.
D) the attraction between 2 nonmetal atoms.
E) the attraction between 2 metal atoms.

Question 15

Give the name for NaHSO₃.

A) monosodium sulfite
B) monosodium sulfate
C) sodium bisulfate
D) sodium bisulfite
E) sodium bisulfide

Question 16

Give the formula for calcium hydrogen sulfate.

A) CaHSO₄
B) Ca₂(HSO₄)₂
C) Ca₂HSO₄
D) Ca(HSO₄)₂

Question 17

Determine the name for H₂CO₃.

A) carbonous acid
B) dihydrogen carbonate
C) carbonic acid
D) hydrocarbonic acid
E) hydrocarbide acid

Question 18

Give the formula for calcium bisulfate.

A) CaHSO₄
B) Ca₂(HSO₄)₂
C) Ca₂HSO₄
D) Ca(HSO₄)₂

Question 19

Give the correct formula for aluminum sulfate.

A) Al₂SO₄
B) Al(SO₄)₃
C) Al₃(SO₄)₂
D) Al₂(SO₄)₃

Question 20

Give the name for H₂SO₄.

A) sulfuric acid
B) persulfurous acid
C) sulfurous acid
D) hyposulfurous acid
E) persulfuric acid

Question 21

How many moles of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

A) 7.02 × 10³ moles
B) 1.42 × 10^-4 moles
C) 1.00 mole
D) 1.21 moles
E) 0.829 moles

Question 22

How many millimoles of Ca(NO₃)₂ contain 4.78 × 10²² formula units of Ca(NO₃)₂? The molar mass of Ca(NO₃)₂ is 164.10 g/mol.

A) 12.6 mmol Ca(NO₃)₂
B) 13.0 mmol Ca(NO₃)₂
C) 20.7 mmol Ca(NO₃)₂
D) 79.4 mmol Ca(NO₃)₂
E) 57.0 mmol Ca(NO₃)₂

Question 23

Determine the name for N₂O₅.

A) dinitrogen pentoxide
B) nitrogen oxide
C) nitrogen (IV) oxide
D) nitrogen (II) oxide
E) nitrogen tetroxide

Question 24

What is the mass (in kg)of 6.89 × 10²⁵ molecules of CO₂? The molar mass of CO₂ is 44.01 g/mol.

A) 3.85 kg
B) 5.04 kg
C) 2.60 kg
D) 3.03 kg
E) 6.39 kg

Question 25

How many SO₃^2- ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃ is 126.05 g/mol.

A) 1.52 × 10²⁷ SO₃^2- ions
B) 4.76 × 10²⁰ SO₃^2- ions
C) 2.10 × 10²¹ SO₃^2- ions
D) 1.05 × 10²¹ SO₃^2- ions
E) 9.52 × 10²⁰ SO₃^2- ions

Question 26

How many molecules of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

A) 5.54 × 10²⁵ N₂O₄ molecules
B) 7.26 × 10²³ N₂O₄ molecules
C) 1.38 × 10²⁴ N₂O₄ molecules
D) 4.59 × 10²⁵ N₂O₄ molecules
E) 4.99 × 10²³ N₂O₄ molecules

Question 27

How many atoms of oxygen are contained in 47.6 g of Al₂(CO₃)₃? The molar mass of Al₂(CO₃)₃ is 233.99 g/mol.

A) 1.23 × 10²³ O atoms
B) 2.96 × 10²⁴ O atoms
C) 2.87 × 10²⁵ O atoms
D) 1.10 × 10²⁴ O atoms
E) 3.68 × 10²³ O atoms

Question 28

How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol.

A) 9.83 × 10²⁰ C₂H₄ molecules
B) 7.74 × 10²⁶ C₂H₄ molecules
C) 2.71 × 10²⁰ C₂H₄ molecules
D) 3.69 × 10²³ C₂H₄ molecules
E) 4.69 × 10²³ C₂H₄ molecules

Question 29

How many atoms of carbon are contained in 47.6 g of Al₂(CO₃)₃? The molar mass of Al₂(CO₃)₃ is 233.99 g/mol.

A) 1.23 × 10²³ C atoms
B) 2.96 × 10²⁴ C atoms
C) 2.87 × 10²⁵ C atoms
D) 1.10 × 10²⁴ C atoms
E) 3.68 × 10²³ C atoms

Question 30

Calculate the molar mass of H₂CO₃.

A) 62.03 g/mol
B) 29.02 g/mol
C) 61.02 g/mol
D) 60.01 g/mol
E) 74.04 g/mol

Question 31

How many sodium ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃ is 126.05 g/mol.

A) 1.52 × 10²⁷ sodium ions
B) 4.76 × 10²⁰ sodium ions
C) 2.10 × 10²¹ sodium ions
D) 1.05 × 10²¹ sodium ions
E) 9.52 × 10²⁰ sodium ions

Question 32

Calculate the molar mass for Mg(ClO₄)₂.

A) 223.21 g/mol
B) 123.76 g/mol
C) 119.52 g/mol
D) 247.52 g/mol
E) 75.76 g/mol

Question 33

Determine the volume of hexane that contains 5.33 × 10²² molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

A) 8.59 mL
B) 13.5 mL
C) 7.40 mL
D) 12.4 mL
E) 11.6 mL

Question 34

Determine the name for P₄O₁₀.

A) phosphorus (IV) oxide
B) diphosphorus pentoxide
C) phosphorus oxide
D) phosphorus (II) oxide
E) tetraphosphorus decoxide

Question 35

Calculate the mass percent composition of sulfur in Al₂(SO₄)₃.

A) 28.12 %
B) 9.372 %
C) 42.73 %
D) 21.38 %
E) 35.97 %

Question 36

Calculate the mass percent composition of lithium in Li₃PO₄.

A) 26.75 %
B) 17.98 %
C) 30.72 %
D) 55.27 %
E) 20.82 %

Question 37

Calculate the molar mass of Al(C₂H₃O₂)₃.

A) 86.03 g/mol
B) 204.13 g/mol
C) 56.00 g/mol
D) 258.09 g/mol
E) 139.99 g/mol

Question 38

How many molecules of butane are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.

A) 2.59 × 10²³ molecules butane
B) 1.46 × 10²⁷ molecules butane
C) 6.87 × 10²³ molecules butane
D) 1.56 × 10²³ molecules butane
E) 7.14 × 10²⁵ molecules butane

Question 39

Calculate the molar mass of Ca₃(PO₄)₂.

A) 87.05 g/mol
B) 215.21 g/mol
C) 310.18 g/mol
D) 279.21 g/mol
E) 246.18 g/mol

Question 40

The molecular weight of urea ((NH₂)₂CO),a compound used as a nitrogen fertilizer,is ________ amu (rounded to one decimal place).

A) 44.0
B) 43.0
C) 60.1
D) 8.0
E) 32.0

Question 41

Which of the following represent the Lewis structure for Cl?

A)
B)
C)
D)
E)

Question 42

Which of the following statements is TRUE?

A) An ionic bond is much stronger than most covalent bonds.
B) An ionic bond is formed through the sharing of electrons.
C) Ionic compounds at room temperature typically conduct electricity.
D) Once dissolved in water, ionic compounds rarely conduct electricity.
E) None of the above are true.

Question 43

Which of the following represent the Lewis structure for Br⁻?

A)
B)
C)
D)
E)

Question 44

Which of the following compounds is nail polish remover?

A) (CH₃₎₂C=O
B) C₂H₅OH
C) CH₃CO₂H
D) CH₃CO₂CH₃
E) CH₃OCH₃

Question 45

Which of the following represent the Lewis structure for Ca²⁺?

A)
B)
C)
D)
E)

Question 46

Which of the following represent the Lewis structure for N?

A)
B)
C)
D)
E)

Question 47

Which of the following compounds is ethanol?

A) C₂H₆
B) C₂H₅OH
C) CH₃CO₂H
D) CH₃CO₂CH₃
E) CH₃OCH₃

Question 48

Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C₂H₅O₂.

A) C₂H₅O₂
B) C₆H₁₅O₆
C) C₃H₇O₃
D) C₄H₁₀O₄
E) C₈H₂₀O₈

Question 49

Which of the following represent the Lewis structure for S²⁻?

A)
B)
C)
D)
E)

Question 50

Which of the following reactions is associated with the lattice energy of Li₂O (ΔH°_latt)?

A) Li₂O(s) → 2 Li⁺(g) + O²⁻(g)
B) 2 Li⁺(aq) + O²⁻(aq) → Li₂O(s)
C) 2 Li⁺(g) + O²⁻(g) → Li₂O(s)
D) Li₂O(s) → 2 Li⁺(aq) + O²⁻(aq)
E) 2 Li(s) + O₂(g) → Li₂O(s)

Question 51

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

A) Al₃O₂
B) Al₂O₃
C) AlO₂
D) Al₂O
E) AlO

Question 52

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

A) NO
B) N₂O
C) NO₂
D) N₂O₃
E) NO₃

Question 53

Determine the molecular formula of a compound that is 49.48% carbon,5.19% hydrogen,28.85% nitrogen,and 16.48% oxygen.The molecular weight is 194.19 g/mol.

A) C₈H₁₂N₄O₂
B) C₄H₅N₂O
C) C₈H₁₀N₄O₂
D) C₈H₁₀N₂O

Question 54

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO₂.

A) N₂O₃
B) N₃O₆
C) N₂O₄
D) NO₂
E) N₂O₅

Question 55

Which of the following is one possible form of pentane?

A) CH₃CH₂CH₂CH₂CH₃
B) CH₃CH=CHCH₂CH₃
C) CH₃CH₂CH₂CH₂CH₂CH₃
D) CH₃CH₂CH₂CH₂CH₂NH₂
E) CH₃CH₂-O-CH₂CH₂CH₃

Question 56

Determine the empirical formula for a compound that contains C,H and O.It contains 52.14% C and 34.73% O by mass.

A) C₂H₆O
B) CHO
C) C₄H₁₃O₂
D) CH₄O₃
E) CH₃O

Question 57

Determine the molecular formula for a compound that is 70.79% carbon,8.91% hydrogen,4.59% nitrogen,and 15.72% oxygen.

A) C₁₈H₂₇NO₃
B) C₁₈H₂₇NO₂
C) C₁₇H₂₇NO₃
D) C₁₇H₂₆NO₃

Question 58

Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.

A) P₃Cl
B) PCl
C) PCl₂
D) P₂Cl₃
E) PCl₃

Question 59

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO₂ and 59.38 mg of H₂O.What is the empirical formula for the compound?

A) C₅H₂O
B) CHO
C) C₃H₆O
D) C₃H₇O
E) C₆HO₃

Question 60

Which of the following represent the Lewis structure for Mg?

A)
B)
C)
D)
E)

Question 61

Dioxybenzone is a compound found in sunscreen,and only contains carbon,oxygen,and hydrogen.Analysis of the compound found that it contains 4.92% hydrogen and 26.18% oxygen.The molar mass of the compound is 244.25 g/mol.What is the molecular formula?

A) C₁₂H₁₀O₃
B) C₁₀H₈O₄
C) C₈H₁₁O₅
D) C₁₄H₁₂O₄
E) C₁₆H₁₀O₆

Question 62

Use the data given below to construct a Born-Haber cycle to determine the second ionization energy of Ca. DH°(kJ)
Ca(s)→ Ca(g)193
Ca(g)→ Ca⁺(g)+ e⁻ 590.
2 O(g)→ O₂(g)-498
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O²⁻(g)878
Ca(s)+ O₂(g)→ CaO(s)-635
Ca²⁺(g)+ O²⁻(g)→ CaO(s)-3414

A) 1010 kJ
B) 1757 kJ
C) 1508 kJ
D) -3027 kJ
E) -1514 kJ

Question 63

What is the empirical formula for a compound that undergoes combustion analysis and produces 12.32g of CO₂ and 6.71g of H₂O?

A) C₃H₄
B) C₄H₇
C) C₃H₈
D) CH₄
E) C₂H₃

Question 64

What is the chemical name for P₂I₄?

A) phosphorous (IV) iodine
B) diphosphorous tetraiodine
C) phosphorous tetraiodine
D) phosphorous (II) iodine
E) diphosphorous iodine

Question 65

The energy associated with formation of a crystalline structure from gaseous ions is know as the

A) ionization energy.
B) lattice energy.
C) precipitation energy.
D) electron affinity.
E) potential energy.

Question 66

What is the formula for zinc chloride?

A) ZnC
B) Zn₂Cl₂
C) ZnCl₂
D) Zn₂Cl
E) ZnCl₃

Question 67

Use the data given below to construct a Born-Haber cycle to determine the bond energy of O₂. DH°(kJ)
Na(s)→ Na(g)107
Na(g)→ Na⁺(g)+ e⁻ 496
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O²⁻(g)878
2 Na(s)+ O₂(g)→ Na₂O(s)-416
2 Na⁺(g)+ O²⁻(g)→ Na₂O(s)-2608

A) 426 kJ
B) 249 kJ
C) 852 kJ
D) 498 kJ
E) 356 kJ

Question 68

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ)
K(s)→ K(g)89
K(g)→ K⁺(g)+ e⁻ 419
Br₂(l)→ 2 Br(g)193
K(s)+ Br₂(g)→ KBr(s)-394
KBr(s)→ K⁺(g)+ Br⁻(g)674

A) -885 kJ
B) -325 kJ
C) +367 kJ
D) -464 kJ
E) +246 kJ

Question 69

Which of the following reactions is associated with the lattice energy of RbI (ΔH°_latt)?

A) Rb(s) + I₂(g) → RbI(s)
B) RbI(s) → Rb⁺(g) + I⁻(g)
C) RbI(s) → Rb(s) + I₂(g)
D) RbI(s) → Rb⁺(aq) + I⁻(aq)
E) Rb⁺(g) + I⁻(g) → RbI(s)

Question 70

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ)
Ca(s)→ Ca(g)193
Ca(g)→ Ca⁺(g)+ e⁻ 590
Ca⁺(g)→ Ca²⁺(g)+ e⁻ 1010
2 O(g)→ O₂(g)-498
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O²⁻(g)878
Ca(s)+ O₂(g)→ CaO(s)-635

A) -3414 kJ
B) +1397 kJ
C) -2667 kJ
D) +3028 kJ
E) -2144 kJ

Question 71

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

A) RbBr > NaF > KCl
B) NaF > KCl > RbBr
C) KCl > NaF > RbBr
D) NaF > RbBr > KCl
E) RbBr > KCl > NaF

Question 72

When drawing out Lewis structures,how many electrons surround the most stable element?

A) 1
B) 3
C) 6
D) 8
E) 10

Question 73

A compound was isolated and found to contain 72.2% magnesium and the rest nitrogen.What is the empirical formula of this compound?

A) Mg₃N₂
B) MgN₃
C) MgN
D) Mg₂N₃
E) Mg₃N

Question 74

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl. DH°(kJ)
K(s)→ K(g)89
K(g)→ K⁺(g)+ e⁻ 418
Cl₂(g)→ 2 Cl(g)244
Cl(g)+ e⁻ → Cl⁻(g)-349
KCl(s)→ K⁺(g)+ Cl⁻(g)717

A) -1119 kJ
B) -997 kJ
C) -437 kJ
D) +631 kJ
E) +158 kJ

Question 75

Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O

A) Li₂O > K₂O > Rb₂S
B) Li₂O > Rb₂S > K₂O
C) Rb₂S > K₂O > Li₂O
D) Rb₂S > Li₂O > K₂O
E) K₂O > Li₂O > Rb₂S

Question 76

What is the formula for calcium phosphate?

A) CaP
B) Ca₂P₃
C) Ca₂(PO₄)₃
D) Ca₃(PO₄)₂
E) CaPO₄

Question 77

Place the following in order of increasing magnitude of lattice energy. CaO MgO SrS

A) MgO < CaO < SrS
B) SrS < MgO < CaO
C) SrS < CaO < MgO
D) CaO < MgO < SrS
E) CaO < SrS < MgO

Question 78

Which of the following reactions is associated with the lattice energy of CaS (ΔH°_latt)?

A) Ca(s) + S(s) → CaS(s)
B) CaS(s) → Ca(s) + S(s)
C) Ca²⁺(aq) + S²⁻(aq) → CaS(s)
D) Ca²⁺(g) + S²⁻(g) → CaS(s)
E) CaS(s) → Ca²⁺(aq) + S²⁻(aq)

Question 79

A double covalent bond contains ________ of electrons.

A) 0 pairs
B) 1 pair
C) 2 pairs
D) 3 pairs
E) 4 pairs

Question 80

A single covalent bond contains ________ of electrons.

A) 0 pairs
B) 1 pair
C) 2 pairs
D) 3 pairs
E) 4 pairs