Question 1

Determine the molecular formula of a compound that has a molar mass of 183.2 g mol-1 and an empirical formula of C2H5O2.

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

The solid compound Na2CO3 contains

Accepted Answer

A) Na+, C4+, and O2- ions. 
B) Na+ and CO3 -2 ions. 
C) Na2+ and CO3 -2 ions. 
D) Na2CO3 molecules. 
A) Na+, C4+, and O2- ions. 
B) Na+ and CO3 -2 ions. 
C) Na2+ and CO3 -2 ions. 
D) Na2CO3 molecules.

Question 4

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Accepted Answer

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 
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 5

How many moles are there in 3.00 g of ethanol, CH3CH2OH?

Accepted Answer

A) 0.00725 mol 
B) 0.0652 mol 
C) 15.3 mol 
D) 138 mol 
A) 0.00725 mol 
B) 0.0652 mol 
C) 15.3 mol 
D) 138 mol

Question 6

Match the following.

-chlorine

Accepted Answer

A) H(g) 
B) Ca2(s) 
C) I(s) 
D) Ne2(g) 
E) I2(s)
F)Ne(g)
G)Cl2(g)
H)Cl(g)
I)Ca(s)
J)H2(g)
K)O(g)
L)O2(g) 
A) H(g) 
B) Ca2(s) 
C) I(s) 
D) Ne2(g) 
E) I2(s)
F)Ne(g)
G)Cl2(g)
H)Cl(g)
I)Ca(s)
J)H2(g)
K)O(g)
L)O2(g)

Question 7

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

Accepted Answer

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

Question 8

Identify the correct formula for sodium chlorate.

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

Identify the formula for sodium chlorate.

Accepted Answer

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

Question 11

Identify the name for FeS.

Accepted Answer

A) iron(I)sulfate 
B) iron(I)sulfide 
C) iron(II)sulfide 
D) iron(II)sulfate 
E) iron sulfide 
A) iron(I)sulfate 
B) iron(I)sulfide 
C) iron(II)sulfide 
D) iron(II)sulfate 
E) iron sulfide

Question 12

How many chloride ions are there in 4.50 mol of aluminum chloride?

Accepted Answer

A) 3.00 chloride ions 
B) 13.5 chloride ions 
C) 2.71 × 1024 chloride ions 
D) 8.13 × 1024 chloride ions 
A) 3.00 chloride ions 
B) 13.5 chloride ions 
C) 2.71 × 1024 chloride ions 
D) 8.13 × 1024 chloride ions

Question 13

Describe a structural formula

Accepted Answer

In a structural formula, lines

Question 14

Identify the name for SnO.

Accepted Answer

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

Question 15

A typical cup of coffee has about 100 mg of caffeine. Calculate the number of caffeine molecules in 100. mg C8H10N4O2.

Accepted Answer

A) 3.22 × 10-21 
B) 3.10 × 1020 
C) 1.17 × 1025 
D) 3.10 × 1022 
E) 3.10 × 1025 
A) 3.22 × 10-21 
B) 3.10 × 1020 
C) 1.17 × 1025 
D) 3.10 × 1022 
E) 3.10 × 1025

Question 16

Determine the name for N2O5.

Accepted Answer

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

Question 17

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Accepted Answer

A) 7.02 × 103 moles N2O4 
B) 1.42 × 10-4 moles N2O4 
C) 1.00 mole N2O4 
D) 1.21 moles N2O4 
E) 0.829 moles N2O4 
A) 7.02 × 103 moles N2O4 
B) 1.42 × 10-4 moles N2O4 
C) 1.00 mole N2O4 
D) 1.21 moles N2O4 
E) 0.829 moles N2O4

Question 18

Which of the following contains BOTH ionic and covalent bonds?

Accepted Answer

A) KI 
B) NH4Cl 
C) CaS 
D) H2S 
E) SiF4 
A) KI 
B) NH4Cl 
C) CaS 
D) H2S 
E) SiF4

Question 19

Describe the difference between a molecular formula and an empirical formula. Give an example.

Accepted Answer

A molecular formula is the exact number

Question 20

Identify the nitrite ion.

Accepted Answer

A) NO-3 
B) NO-2 
C) NH+4 
D)  N-3 
E) N3- 
A) NO-3 
B) NO-2 
C) NH+4 
D)  N-3 
E) N3-

Exam 3: Molecules, Compounds, and Nomenclature

Determine the molecular formula of a compound that has a molar mass of 183.2 g mol-1 and an empirical formula of C2H5O2.

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

The solid compound Na2CO3 contains

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

How many moles are there in 3.00 g of ethanol, CH3CH2OH?

Match the following. -chlorine

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

Identify the correct formula for sodium chlorate.

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

Identify the formula for sodium chlorate.

Identify the name for FeS.

How many chloride ions are there in 4.50 mol of aluminum chloride?

Describe a structural formula

Identify the name for SnO.

A typical cup of coffee has about 100 mg of caffeine. Calculate the number of caffeine molecules in 100. mg C8H10N4O2.

Determine the name for N2O5.

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Which of the following contains BOTH ionic and covalent bonds?

Describe the difference between a molecular formula and an empirical formula. Give an example.

Identify the nitrite ion.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Determine the molecular formula of a compound that has a molar mass of 183.2 g mol^-1 and an empirical formula of C₂H₅O₂.

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

The solid compound Na₂CO₃ contains

How many molecules of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g mol^-1.

How many moles are there in 3.00 g of ethanol, CH₃CH₂OH?

A typical cup of coffee has about 100 mg of caffeine. Calculate the number of caffeine molecules in 100. mg C₈H₁₀N₄O₂.

Determine the name for N₂O₅.

How many moles of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g mol^-1.