Question 1

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-1.

Accepted Answer

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 
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 2

How many molecules are in 1.500 g of riboflavin,C17H20N4O6?

Accepted Answer

A) 1.066 × 1021 
B) 4.167 × 10-22 
C) 3.400 × 1026 
D) 1.067 × 1024 
E) 2.400 × 1021 
A) 1.066 × 1021 
B) 4.167 × 10-22 
C) 3.400 × 1026 
D) 1.067 × 1024 
E) 2.400 × 1021

Question 3

How many moles of N2O3 contain 2.55 × 1024 oxygen atoms?

Accepted Answer

A) 1.41 moles N2O3 
B) 4.23 moles N2O3 
C) 12.7 moles N2O3 
D) 7.87 moles N2O3 
E) 2.82 moles N2O3 
A) 1.41 moles N2O3 
B) 4.23 moles N2O3 
C) 12.7 moles N2O3 
D) 7.87 moles N2O3 
E) 2.82 moles N2O3

Question 4

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

Accepted Answer

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

Question 5

Which of the compounds,Na H ,H2S ,C4H10,BrF,are ionic compounds?

Accepted Answer

A) only C4H10 
B) only Na H  
C) Na H  and H2S  
D) H2S ,C4H10,and BrF3 
A) only C4H10 
B) only Na H  
C) Na H  and H2S  
D) H2S ,C4H10,and BrF3

Question 6

Identify the charge,X,on the barium ion $\mathrm { Ba } ^ { \mathrm { X } }$ .

Accepted Answer

A) +1 
B) +2 
C) +3 
D) -1 
E) -2 
A) +1 
B) +2 
C) +3 
D) -1 
E) -2

Question 7

The molecular weight of sucrose (C12H22O11),table sugar,is ________ amu (rounded to one decimal place).

Accepted Answer

A) 330.3 
B) 342.3 
C) 29.0 
D) 45.0 
E) 182.0 
A) 330.3 
B) 342.3 
C) 29.0 
D) 45.0 
E) 182.0

Question 8

Calculate the molar mass of Al(C2H3O2)3.

Accepted Answer

A) 86.03 g mol-1 
B) 204.13 g mol-1 
C) 56.00 g mol-1 
D) 258.09 g mol-1 
E) 139.99 g mol-1 
A) 86.03 g mol-1 
B) 204.13 g mol-1 
C) 56.00 g mol-1 
D) 258.09 g mol-1 
E) 139.99 g mol-1

Question 9

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 10

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO2 and 0.1451 g of H2O.What is the empirical formula of the compound?

Accepted Answer

A) CH2 
B) C2H5 
C) C4H10 
D) C5H2 
A) CH2 
B) C2H5 
C) C4H10 
D) C5H2

Question 11

Identify the name for PBr3.

Accepted Answer

A) phosphorus tribromide 
B) potassium tribromide 
C) phosphorus(III)bromide 
D) phosphorus(II)bromide 
E) phosphorus bromide 
A) phosphorus tribromide 
B) potassium tribromide 
C) phosphorus(III)bromide 
D) phosphorus(II)bromide 
E) phosphorus bromide

Question 12

What is the charge on an aluminum ion?

Accepted Answer

A) +3 
B) +2 
C) +1 
D) -1 
E) -2 
A) +3 
B) +2 
C) +1 
D) -1 
E) -2

Question 13

Identify the name for Sr(NO3)2∙4H2O.

Accepted Answer

A) tin(II)nitrate tetrahydrate 
B) strontium nitrate tetrahydrate 
C) scandium nitrate tetrahydrate 
D) tin(III)nitrate tetrahydrate 
E) tin(II)nitrate quadhydrate 
A) tin(II)nitrate tetrahydrate 
B) strontium nitrate tetrahydrate 
C) scandium nitrate tetrahydrate 
D) tin(III)nitrate tetrahydrate 
E) tin(II)nitrate quadhydrate

Question 14

How can one compound contain both ionic and covalent bonds? Give an example.

Accepted Answer

An ionic compound that contains a polyat

Question 15

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

Accepted Answer

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

Question 16

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 17

Which of the following has the smallest mass?

Accepted Answer

A) 3.50 × 1023 molecules of I2 
B) 85.0 g of Cl2 
C) 2.50 mol of F2 
D) 0.050 kg of Br2 
A) 3.50 × 1023 molecules of I2 
B) 85.0 g of Cl2 
C) 2.50 mol of F2 
D) 0.050 kg of Br2

Question 18

Identify the charge,X,on the acetate ion $\mathrm { C } _ { 2 }$ $\mathrm { H } _ { 3 }$ $\mathrm { O } _ { 2 } ^ { \mathrm { X } }$ .

Accepted Answer

A) +1 
B) +2 
C) +3 
D) -2 
E) -1 
A) +1 
B) +2 
C) +3 
D) -2 
E) -1

Question 19

Identify the formula for sulfurous acid.

Accepted Answer

A) H2SO3 
B) HSO3 
C) H2SO4 
D) HSO4 
A) H2SO3 
B) HSO3 
C) H2SO4 
D) HSO4

Question 20

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

Exam 3: Molecules,compounds,and Nomenclature

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-1.

How many molecules are in 1.500 g of riboflavin,C17H20N4O6?

How many moles of N2O3 contain 2.55 × 1024 oxygen atoms?

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

Which of the compounds,Na H ,H2S ,C4H10,BrF,are ionic compounds?

Identify the charge,X,on the barium ion BaX\mathrm { Ba } ^ { \mathrm { X } }BaX .

The molecular weight of sucrose (C12H22O11),table sugar,is ________ amu (rounded to one decimal place).

Calculate the molar mass of Al(C2H3O2)3.

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

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO2 and 0.1451 g of H2O.What is the empirical formula of the compound?

Identify the name for PBr3.

What is the charge on an aluminum ion?

Identify the name for Sr(NO3)2∙4H2O.

How can one compound contain both ionic and covalent bonds? Give an example.

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

Identify the name for FeS.

Which of the following has the smallest mass?

Identify the charge,X,on the acetate ion C2\mathrm { C } _ { 2 }C2​ H3\mathrm { H } _ { 3 }H3​ O2X\mathrm { O } _ { 2 } ^ { \mathrm { X } }O2X​ .

Identify the formula for sulfurous acid.

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

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 Metallurgy

Transition Metals and Coordination Compounds

Filters

How many atoms of oxygen are contained in 47.6 g of Al₂(CO₃)₃? The molar mass of Al₂(CO₃)₃is 233.99 g mol^-1.

How many molecules are in 1.500 g of riboflavin,C₁₇H₂₀N₄O₆?

How many moles of N₂O₃ contain 2.55 × 10²⁴ oxygen atoms?

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

Which of the compounds,NaH,H₂S,C₄H₁₀,BrF,are ionic compounds?

Identify the charge,X,on the barium ion $\mathrm { Ba } ^ { \mathrm { X } }$ .

The molecular weight of sucrose (C₁₂H₂₂O₁₁),table sugar,is ________ amu (rounded to one decimal place).

Calculate the molar mass of Al(C₂H₃O₂)₃.

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

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO₂ and 0.1451 g of H₂O.What is the empirical formula of the compound?

Identify the name for PBr₃.

Identify the name for Sr(NO₃)₂∙4H₂O.

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

Identify the charge,X,on the acetate ion $\mathrm { C } _ { 2 }$ $\mathrm { H } _ { 3 }$ $\mathrm { O } _ { 2 } ^ { \mathrm { X } }$ .