Question 1

How many moles of CH3CH2OH are contained in 548 mL of a 0.0788 mol L-1 CH3CH2OH solution?

Accepted Answer

A) 4.32 × 10-2 mol 
B) 2.32 × 10-2 mol 
C) 6.95 × 10-2 mol 
D) 1.44 × 10-2 mol 
E) 5.26 × 10-2 mol 
A) 4.32 × 10-2 mol 
B) 2.32 × 10-2 mol 
C) 6.95 × 10-2 mol 
D) 1.44 × 10-2 mol 
E) 5.26 × 10-2 mol

Question 2

Which of the following is a weak electrolyte?

Accepted Answer

A) LiOH 
B) CaCl2 
C) MgCO3 
D) NaC2H3O2 
E) Li2SO4 
A) LiOH 
B) CaCl2 
C) MgCO3 
D) NaC2H3O2 
E) Li2SO4

Question 3

What are the required coefficients to properly balance the following chemical reaction? Na(s)+ H2O(l)→ H2(g)+ NaOH(aq)

Accepted Answer

A) 1,2,2,1 
B) 2,2,1,1 
C) 2,1,1,1 
D) 2,1,2,1 
E) 2,2,1,2 
A) 1,2,2,1 
B) 2,2,1,1 
C) 2,1,1,1 
D) 2,1,2,1 
E) 2,2,1,2

Question 4

According to the balanced equation shown below,4.00 moles of oxalic acid,H2C2O4,reacts with ________ moles of permanganate,MnO4-. 
5H2C2O4(aq)+ 2MnO4-(aq)+ 6H+(aq)→ 10CO2(g)+ Mn2+(aq)+ 8H2O(l)

Accepted Answer

A) 1.60 
B) 4.00 
C) 8.00 
D) 9.00 
A) 1.60 
B) 4.00 
C) 8.00 
D) 9.00

Question 5

How many of the following compounds are soluble in water? 
Cu(OH)2 LiNO3 NH4Br K2S

Accepted Answer

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

Question 6

A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO3- ion are there in the final solution?

Accepted Answer

A) 0.0197 g 
B) 0.0394 g 
C) 0.0542 g 
D) 0.108 g 
A) 0.0197 g 
B) 0.0394 g 
C) 0.0542 g 
D) 0.108 g

Question 7

Identify the percent yield when 28.16 g of CO2 are formed from the reaction of 4.000 moles of C8H18 with 8.000 moles of O2. 
2C8H18 + 25O2 → 16CO2 + 18H2O

Accepted Answer

A) 20.00% 
B) 25.00% 
C) 50.00% 
D) 12.50% 
A) 20.00% 
B) 25.00% 
C) 50.00% 
D) 12.50%

Question 8

Which of the compounds of H2C2O4, Ca(OH)2,KOH,and HI behave as acids when they are dissolved in water?

Accepted Answer

A) Ca(OH)2 and KOH 
B)  H2C2O4 and HI 
C) only HI 
D) only KOH 
A) Ca(OH)2 and KOH 
B)  H2C2O4 and HI 
C) only HI 
D) only KOH

Question 9

Find the volume of 0.110 mol L-1 hydrochloric acid necessary to react completely with 1.52 g $\mathrm { Al } ( \mathrm { OH } ) _ { 3 }$ .

Accepted Answer

A) 0.658 L 
B) 1.52 L 
C) 1.88 L 
D) 1.01 L 
E) 0.531 L 
A) 0.658 L 
B) 1.52 L 
C) 1.88 L 
D) 1.01 L 
E) 0.531 L

Question 10

Which of the following compounds is insoluble in water?

Accepted Answer

A) Hg2I2 
B) MgSO4 
C) (NH4)2CO3 
D) BaS 
E) All of these compounds are soluble in water. 
A) Hg2I2 
B) MgSO4 
C) (NH4)2CO3 
D) BaS 
E) All of these compounds are soluble in water.

Question 11

How many chloride ions are present in 65.5 mL of 0.210 mol L-1 AlCl3 solution?

Accepted Answer

A) 4.02 × 1023 chloride ions 
B) 5.79 × 1024 chloride ions 
C) 2.48 × 1022 chloride ions 
D) 8.28 × 1021 chloride ions 
E) 1.21 × 1022 chloride ions 
A) 4.02 × 1023 chloride ions 
B) 5.79 × 1024 chloride ions 
C) 2.48 × 1022 chloride ions 
D) 8.28 × 1021 chloride ions 
E) 1.21 × 1022 chloride ions

Question 12

Explain the difference between a strong and weak electrolyte.Give an example of each.

Accepted Answer

A strong electrolyte is either an ionic

Question 13

Consider the following reaction.How many moles of oxygen are required to produce 2.33 moles of water? Assume that there is excess C3H7SH present. C3H7SH(l)+ 6O2(g)→ 3CO2(g)+ SO2(g)+ 4H2O (g)

Accepted Answer

A) 1.55 moles O2 
B) 3.50 moles O2 
C) 2.33 moles O2 
D) 4.14 moles O2 
E) 6.21 moles O2 
A) 1.55 moles O2 
B) 3.50 moles O2 
C) 2.33 moles O2 
D) 4.14 moles O2 
E) 6.21 moles O2

Question 14

Which substance is the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide according to the following chemical equation? 
2S(s)+ 3O2(g)+ 4NaOH(aq)→ 2Na2SO4(aq)+ 2H2O(l)

Accepted Answer

A) S(s) 
B) O2(g) 
C) NaOH(aq) 
D) None of these substances is the limiting reactant. 
A) S(s) 
B) O2(g) 
C) NaOH(aq) 
D) None of these substances is the limiting reactant.

Question 15

What are the required coefficients to properly balance the following chemical reaction? C6H12O6(s)+ O2(g)→ CO2(g)+ H2O(l)

Accepted Answer

A) 1,3,3,3 
B) 2,6,6,3 
C) 1,6,6,6 
D) 1,1,3,3 
E) 2,2,6,3 
A) 1,3,3,3 
B) 2,6,6,3 
C) 1,6,6,6 
D) 1,1,3,3 
E) 2,2,6,3

Question 16

What volume of 0.305 mol L-1 AgNO3 is required to react exactly with 155.0 mL of 0.274 mol L-1 Na2SO4 solution? Hint: You will want to write a balanced reaction.

Accepted Answer

A) 581 mL 
B) 173 mL 
C) 345 mL 
D) 139 mL 
E) 278 mL 
A) 581 mL 
B) 173 mL 
C) 345 mL 
D) 139 mL 
E) 278 mL

Question 17

Determine the number of grams H2 formed when 250.0 mL of 0.743 mol L-1 HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction: 
2HCl(aq)+ Fe(s)→ H2(g)+ FeCl2(aq)

Accepted Answer

A) 0.374 g 
B) 1.33 g 
C) 1.14 g 
D) 0.187 g 
E) 1.51 g 
A) 0.374 g 
B) 1.33 g 
C) 1.14 g 
D) 0.187 g 
E) 1.51 g

Question 18

The mixing of which pair of reactants will result in a precipitation reaction?

Accepted Answer

A) CsI(aq)+ NaOH(aq) 
B) HCl(aq)+ Ca(OH)2(aq) 
C) K2SO4(aq)+ Ba(NO3)2(aq) 
D) NaNO3(aq)+ NH4Cl(aq) 
A) CsI(aq)+ NaOH(aq) 
B) HCl(aq)+ Ca(OH)2(aq) 
C) K2SO4(aq)+ Ba(NO3)2(aq) 
D) NaNO3(aq)+ NH4Cl(aq)

Question 19

Determine the oxidation state of Sn in Sn(SO4)2.

Accepted Answer

A) +2 
B) +4 
C) +6 
D) 0 
E) -2 
A) +2 
B) +4 
C) +6 
D) 0 
E) -2

Question 20

What is the concentration of HCl in the final solution when 65 mL of a 12 mol L-1 HCl solution is diluted with pure water to a total volume of 0.15 L?

Accepted Answer

A) 2.8 × 10-2 mol L-1 
B) 5.2 mol L-1 
C) 28 mol L-1 
D) 5.2 × 103 mol L-1 
A) 2.8 × 10-2 mol L-1 
B) 5.2 mol L-1 
C) 28 mol L-1 
D) 5.2 × 103 mol L-1

Exam 4: Chemical Reactions and Stoichiometry

How many moles of CH3CH2OH are contained in 548 mL of a 0.0788 mol L-1 CH3CH2OH solution?

Which of the following is a weak electrolyte?

What are the required coefficients to properly balance the following chemical reaction? Na(s)+ H2O(l)→ H2(g)+ NaOH(aq)

According to the balanced equation shown below,4.00 moles of oxalic acid,H2C2O4,reacts with ________ moles of permanganate,MnO4-. 5H2C2O4(aq)+ 2MnO4-(aq)+ 6H+(aq)→ 10CO2(g)+ Mn2+(aq)+ 8H2O(l)

How many of the following compounds are soluble in water? Cu(OH)2 LiNO3 NH4Br K2S

A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO3- ion are there in the final solution?

Identify the percent yield when 28.16 g of CO2 are formed from the reaction of 4.000 moles of C8H18 with 8.000 moles of O2. 2C8H18 + 25O2 → 16CO2 + 18H2O

Which of the compounds of H2C2O4, Ca(OH)2,KOH,and HI behave as acids when they are dissolved in water?

Find the volume of 0.110 mol L-1 hydrochloric acid necessary to react completely with 1.52 g Al(OH)3\mathrm { Al } ( \mathrm { OH } ) _ { 3 }Al(OH)3​ .

Which of the following compounds is insoluble in water?

How many chloride ions are present in 65.5 mL of 0.210 mol L-1 AlCl3 solution?

Explain the difference between a strong and weak electrolyte.Give an example of each.

Consider the following reaction.How many moles of oxygen are required to produce 2.33 moles of water? Assume that there is excess C3H7SH present. C3H7SH(l)+ 6O2(g)→ 3CO2(g)+ SO2(g)+ 4H2O (g)

Which substance is the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide according to the following chemical equation? 2S(s)+ 3O2(g)+ 4NaOH(aq)→ 2Na2SO4(aq)+ 2H2O(l)

What are the required coefficients to properly balance the following chemical reaction? C6H12O6(s)+ O2(g)→ CO2(g)+ H2O(l)

What volume of 0.305 mol L-1 AgNO3 is required to react exactly with 155.0 mL of 0.274 mol L-1 Na2SO4 solution? Hint: You will want to write a balanced reaction.

Determine the number of grams H2 formed when 250.0 mL of 0.743 mol L-1 HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction: 2HCl(aq)+ Fe(s)→ H2(g)+ FeCl2(aq)

The mixing of which pair of reactants will result in a precipitation reaction?

Determine the oxidation state of Sn in Sn(SO4)2.

What is the concentration of HCl in the final solution when 65 mL of a 12 mol L-1 HCl solution is diluted with pure water to a total volume of 0.15 L?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules,compounds,and Nomenclature

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 moles of CH₃CH₂OH are contained in 548 mL of a 0.0788 mol L^-1 CH₃CH₂OH solution?

What are the required coefficients to properly balance the following chemical reaction? Na(s)+ H₂O(l)→ H₂(g)+ NaOH(aq)

According to the balanced equation shown below,4.00 moles of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate,MnO₄^-. 5H₂C₂O₄(aq)+ 2MnO₄^-(aq)+ 6H⁺(aq)→ 10CO₂(g)+ Mn²⁺(aq)+ 8H₂O(l)

How many of the following compounds are soluble in water? Cu(OH)₂ LiNO₃ NH₄Br K₂S

A student dissolved 4.00 g of Co(NO₃)₂ in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO₃^- ion are there in the final solution?

Identify the percent yield when 28.16 g of CO₂ are formed from the reaction of 4.000 moles of C₈H₁₈ with 8.000 moles of O₂. 2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O

Which of the compounds of H₂C₂O_4, Ca(OH)₂,KOH,and HI behave as acids when they are dissolved in water?

Find the volume of 0.110 mol L^-1 hydrochloric acid necessary to react completely with 1.52 g $\mathrm { Al } ( \mathrm { OH } ) _ { 3 }$ .

How many chloride ions are present in 65.5 mL of 0.210 mol L^-1 AlCl₃ solution?

Consider the following reaction.How many moles of oxygen are required to produce 2.33 moles of water? Assume that there is excess C₃H₇SH present. C₃H₇SH(l)+ 6O₂(g)→ 3CO₂(g)+ SO₂(g)+ 4H₂O (g)

Which substance is the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide according to the following chemical equation? 2S(s)+ 3O₂(g)+ 4NaOH(aq)→ 2Na₂SO₄(aq)+ 2H₂O(l)

What are the required coefficients to properly balance the following chemical reaction? C₆H₁₂O₆(s)+ O₂(g)→ CO₂(g)+ H₂O(l)

What volume of 0.305 mol L^-1 AgNO₃ is required to react exactly with 155.0 mL of 0.274 mol L^-1 Na₂SO₄ solution? Hint: You will want to write a balanced reaction.

Determine the number of grams H₂ formed when 250.0 mL of 0.743 mol L^-1 HCl solution reacts with 3.41 × 10²³ atoms of Fe according to the following reaction: 2HCl(aq)+ Fe(s)→ H₂(g)+ FeCl₂(aq)

Determine the oxidation state of Sn in Sn(SO₄)₂.

What is the concentration of HCl in the final solution when 65 mL of a 12 mol L^-1 HCl solution is diluted with pure water to a total volume of 0.15 L?