Deck 3: Chemical Compounds

Question 1

Which of the following are constitutional isomers?

A) CH₂O and C₆H₁₂O₆
B) C₃H₈ and CH₃CH₂CH₃
C) C₂H₅OH and CH₃OCH₃
D) C₂H₄ and C₂H₆
E) C₆H₅OH and C₆H₄(OH)₂

Answer 1

C₂H₅OH and CH₃OCH₃

Question 2

Find the correct combination of protons and electrons below for the magnesium ion.

A) 12 protons and 12 electrons
B) 12 protons and 14 electrons
C) 24 protons and 24 electrons
D) 24 protons and 22 electrons
E) None of these

Answer 2

None of these

Question 3

Which of the following is not a binary compound?

A) H₂O
B) CaCl₂
C) NH₃
D) HCN
E) NaBr

Answer 3

HCN

Question 4

What is the correct general formula for a non cyclic alkane?

A) C_nH_2n
B) C_nH_n+2
C) C_nH_n
D) C_nH_2n+2
E) C_nH_2n-2

Question 5

Which combination below corresponds to the H⁺ ion?

A) 2 protons and 1 electron
B) 1 proton and 2 electrons
C) 2 protons and 3 electrons
D) 1 proton and 1 electron
E) None of these

Question 6

Which statement about constitutional isomers is true?

A) Constitutional isomers have the same physical properties.
B) Constitutional isomers always contain identical covalent bonding patterns.
C) Constitutional isomers have the same molecular formulas.
D) Constitutional isomers have the same chemical properties.
E) Constitutional isomers only occur among straight chain compounds.

Question 7

Which of the following is not an ionic compound?

A) MgCl₂
B) NaOH
C) NaF
D) FCl₃
E) CaO

Question 8

Which compound is an alcohol?

A) C₆H₅OH
B) CH₄
C) CH₃NH₂
D) C₂H₆
E) CH₃OCH₃

Question 9

Which formula name combination is incorrect?

A) CS₂ and carbon disulfide
B) SO₂ and sulfur dioxide
C) P₂O₃ and diphosphorus trioxide
D) CCl₄ and carbon tetrachloride
E) SCl₂ and sulfur bichloride

Question 10

Which of the following is not an ionic compound?

A) TiCl₄
B) MgO
C) CH₄
D) Na₂S
E) LiF

Question 11

The formula CH₃CH₂CH₂OH is an example of a(n):

A) structural formula.
B) functional group formula.
C) inorganic formula.
D) ball and stick model.
E) condensed formula.

Question 12

Find the correct combination of protons and electrons below for the fluoride ion.

A) 9 protons and 8 electrons
B) 9 protons and 9 electrons
C) 9 protons and 10 electrons
D) 19 protons and 18 electrons
E) 19 protons and 20 electrons

Question 13

The chemical compound (CH₃)₃COH can also be represented as:

A) C₃H₉O.
B) C₃H₁₀O.
C) C₄H₉O.
D) C₄H₁₀O.
E) C₄H₁₀O₂.

Question 14

Which of the following number and prefix combinations is incorrect?

A) 2 bi
B) 3 tri
C) 5 penta
D) 6 hexa
E) 8 octa

Question 15

Which combination below corresponds to an anion with a -1 charge?

A) 16 protons and 18 electrons
B) 17 protons and 18 electrons
C) 18 protons and 17 electrons
D) 18 protons and 18 electrons
E) 19 protons and 18 electrons

Question 16

Which compound is not a hydrocarbon?

A) C₂H₆
B) C₂H₂
C) C₆H₁₄
D) CH₄
E) CH₃OH

Question 17

Which alkane will have the lowest boiling point?

A) ethane
B) propane
C) butane
D) hexane
E) octane

Question 18

Select the molecular formula for a compound that contains 10 carbon atoms, 24 hydrogen atoms, 1 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom.

A) Ca₁₀Hy₂₄NiOx₃Su
B) C₁₀H₂₄NO₃Sn
C) Cu₁₀H₂₄NO₃S
D) C₁₀H₂₄NO₃S
E) Ca₁₀H₂₄NO₃Se

Question 19

Which compound is incorrectly named?

A) C₈H₁₈ octane
B) C₇H₁₆ hexane
C) C₅H₁₂ pentane
D) C₄H₁₀ butane
E) C₃H₈ propane

Question 20

Which formula name combination is incorrect?

A) SeCl₄ and selenium tetrafluoride
B) N₂O₃ and dinitrogen trioxide
C) P₄O₁₀ and tetraphosphorus decoxide
D) AsF₅ and arsenic pentafluoride
E) SF₆ and sulfur heptafluoride

Question 21

Determine the percent platinum in cisplatin, PtCl₂(NH₃)₂.

A) 0.650%
B) 78.9%
C) 58.5%
D) 65.0%
E) 23.6%

Question 22

Give the formula for the ionic compound that forms between strontium and fluorine.

A) Sr₂F
B) Sr₂F₃
C) Sr₂F₄
D) SrF
E) SrF₂

Question 23

Give the formula for the ionic compound that forms between sodium and oxygen.

A) NaO
B) Na₂O
C) NaO₂
D) Na₂O₃
E) Na₃O₂

Question 24

Determine the number of molecules in 325 mg of aspirin, C₉H₈O₄.

A) 1.81 × 10^-3
B) 1.09 × 10²¹
C) 3.34 × 10²³
D) 1.09 × 10²⁴
E) 3.34 × 10²⁶

Question 25

Which compound is incorrectly named?

A) NaF sodium fluoride
B) MgBr₂ magnesium bromide
C) CaO calcium oxide
D) CuO copper(II) oxide
E) TiCl₄ titanium tetrachloride

Question 26

Which statement concerning ionic compounds is incorrect?

A) Ionic compounds consist of anions and cations in a crystal lattice.
B) Ionic compounds conduct electricity poorly as a solid.
C) Ionic compounds produce aqueous ions when dissolved in water.
D) Ionic compounds have a high boiling point.
E) Ionic compounds conduct electricity poorly when molten.

Question 27

Determine the percent potassium present in K₂SO₄.

A) 22.4%
B) 28.9%
C) 44.9%
D) 57.9%
E) None of these

Question 28

Determine the number of molecules in a drop of water that has a mass of 0.050 g.

A) 6.50 × 10²⁶ molecules
B) 5.02 × 10²¹ molecules
C) 5.42 × 10²³ molecules
D) 2.17 × 10²⁶ molecules
E) 1.67 × 10²¹ molecules

Question 29

Give the formula for the ionic compound that forms between aluminum and oxygen.

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

Question 30

A sample contains 52.0 g of elemental phosphorus, P₄. Determine the number of moles of P₄ and the number of atoms of phosphorus present in the sample.

A) 0.419 moles, 2.52 × 10²³ atoms
B) 1.68 moles, 1.01 × 10²⁴ atoms
C) 0.419 moles, 1.01 × 10²⁴ atoms
D) 1.68 moles, 4.04 × 10²⁴ atoms
E) 0.419 moles, 2.79 × 10^-24 atoms

Question 31

Which compound is incorrectly named?

A) Fe(OH)₃ iron(III) hydroxide
B) NH₄NO₃ ammonium nitrate
C) K₂Cr₂O₇ potassium dichromate
D) Ba(OH)₂ barium hydroxide
E) Na₂SO₄ sodium sulfite

Question 32

A combustion reaction produces 49.4 g of CO₂. Determine the number of moles of carbon dioxide present.

A) 1.78 moles
B) 1090 moles
C) 0.891 moles
D) 0.882 moles
E) 1.12 moles

Question 33

Which compound is incorrectly named?

A) MgO magnesium oxide
B) Fe₂O₃ iron(II) oxide
C) CsCl cesium chloride
D) K₂S potassium sulfide
E) Na₃N sodium nitride

Question 34

Determine the percent water present in epsom salt, MgSO₄·7H₂O.

A) 7.31%
B) 9.86%
C) 13.0%
D) 87.0%
E) 51.2%

Question 35

How many grams of sugar, C₁₂H₂₂O₁₁, are present in 0.500 moles of sugar?

A) 1.46 × 10^-3 g
B) 0.500 g
C) 171 g
D) 6.84 × 10³ g
E) 3240 g

Question 36

Which compound is incorrectly named?

A) Ni(NO₃)₂ nickel(II) nitrate
B) Al₂(SO₄)₃ aluminum sulfate
C) Mg₃(PO₄)₂ magnesium phosphate
D) Ba(OH)₂ barium(II) hydroxide
E) KCl potassium chloride

Question 37

Determine the percent carbon in the acetate ion CH₃COO^-.

A) 24.0%
B) 59.0%
C) 20.3%
D) 40.7%
E) 59.3%

Question 38

Which ion is incorrectly named?

A) K⁺ potassium ion
B) Ni²⁺ nickel(II) ion
C) Cr⁴⁺ chromium(IV) ion
D) Ba²⁺ barium ion
E) Ca²⁺ calcium(II) ion

Question 39

Which ionic compound is expected to have the highest melting point?

A) Li₃N
B) BN
C) MgF₂
D) Na₂O
E) LiCl

Question 40

Which of the following is not a typical property of an ionic compound?

A) has a crystalline structure
B) splits along planes of ions when cleaved by an outside force
C) contains anions neighboring each other in a crystal lattice
D) has a high melting point
E) acts as an electrolyte when dissolved in water

Question 41

A compound is composed of 56.4% phosphorus and the remainder oxygen. Determine the empirical formula of the compound.

A) PO₅
B) P₂O
C) P₃O₂
D) P₂O₃
E) P₂O₅

Question 42

When 2.34 g of pure iron is allowed to react with an excess of oxygen, 3.35 g of the final compound is produced. Determine the formula of the compound.

A) Fe₂O₃
B) FeO
C) FeO₂
D) FeO₃
E) FeO₄

Question 43

A hydrate of magnesium sulfate, MgSO₄·nH₂O, loses 37.4% of its mass upon heating. The mass loss can be considered to be only water. What is the value of n if all of the water was lost?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 44

An organic compound has an empirical formula of CH₂O and had an approximate molecular weight of 117. What is its molecular formula?

A) C_3.9H_7.8O_3.9
B) C_3.9H_3.9O_3.9
C) C₄H₄O₄
D) C₈H₄O₈
E) C₄H₈O₄

Question 45

Name the alkane with the formula C₃H₈.

Question 46

Which of the following elements is classified as a trace element in the human body?

A) mercury
B) cesium
C) gallium
D) arsenic
E) None of these.

Question 47

Give the formula for an alkane containing five carbon atoms.

Question 48

_____________ containing compounds are known as organic compounds.

Question 49

Name the compound with the formula VCl₃.

Question 50

An organic compound contains 60.0% carbon, 4.44% hydrogen and the remainder oxygen. It has a molecular weight of 180. Determine the empirical formula of the compound.

A) C₂H₂O
B) C₆H₁₂O₆
C) C₉H₈O₄
D) C₁₀H₁₂O₃
E) C₁₁H₁₆O

Question 51

Which of the elements listed below is least abundant in the human body?

A) hydrogen
B) nitrogen
C) iron
D) oxygen
E) carbon

Question 52

Ions that contain atoms of more than two elements are called _____________ ions.

Question 53

Compounds that are composed of carbon and _____________ are hydrocarbons.

Question 54

The molecular formula for copper (II) oxide is _____________.

Question 55

An organic compound has an empirical formula of C₂H₃O and had an approximate molecular weight of 86. What is its molecular formula?

A) C₂H₃O
B) C₄H₆O₂
C) C₆H₈O₃
D) C₈H₁₂O₄
E) C₁₀H₁₄O₅

Question 56

A hydrocarbon contains 85.7% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

A) CH
B) CH₂
C) CH₃
D) C₂H
E) C₂H₃

Question 57

A hydrocarbon contains 79.89% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

A) C₂H₅
B) CH₃
C) C₃H₈
D) C₄H₁₀
E) C₅H₁₂

Question 58

Caffeine has the empirical formula C₄H₅N₂O and an approximate molecular weight of 194.2 g/mol. What is its molecular formula?

A) C₄H₅N₂O
B) C₂H₂NO
C) C₈H₁₀N₄O₂
D) C₄H₄N₄O₄
E) C₂H₂N₂O₂

Question 59

Write the formula for chromium(III) sulfate.

Question 60

An organic compound contains 49.3% carbon, 6.9% hydrogen and the remainder oxygen. Determine the empirical formula of the compound.

A) CH₂O
B) C₃H₂O
C) C₃H₅O
D) C₃H₅O₂
E) C₆H₁₀O₅

Question 61

The molar mass of nicotine C₁₀H₁₄N_x is 162 g/mol. What is the value of x?

Question 63

A compound that forms between a non-metal and a non-metal is a(n) _____________.

Question 64

Compounds that have the same formula but differ in the ____________ of their atoms are called constitutional isomers

Question 65

The molar mass of calcium hydroxide, Ca(OH)₂ is _____________.

Question 66

Match the following: