Question 1

What mass of water is produced in the metathesis reaction 75.2 g Zn(OH)2 with 43.4 g HCl?

Accepted Answer

A) 13.6 g 
B) 27.3 g 
C) 10.7 g 
D) 21.4 g 
E) 31.8 g 
A) 13.6 g 
B) 27.3 g 
C) 10.7 g 
D) 21.4 g 
E) 31.8 g

Question 2

What is the concentration (M)of a NaCl solution prepared by dissolving 7.2 g of NaCl in sufficient water to give 425 mL of solution?

Accepted Answer

The answer of What is the concentration (M)of a NaCl...

Question 3

Molarity is defined as moles of solute per kg of solution.

Accepted Answer

A) True 
 B)False

Question 4

Consider the equation:
2 Na + 2 H2O → 2 NaOH + H2
If 92.0 g of sodium is reacted with 76.0 g of water until the reaction goes to completion,which reactant will remain and in what quantity?

Accepted Answer

A) 72.0 g water 
B) 43.5 g sodium 
C) 3.9 g water 
D) 10.0 g sodium 
E) 10.0 g water 
A) 72.0 g water 
B) 43.5 g sodium 
C) 3.9 g water 
D) 10.0 g sodium 
E) 10.0 g water

Question 5

How many grams of sulfuric acid,H2SO4,can be obtained from 400 grams of iron ore if the ore is 80.0% by mass FeS? The reactions involved are given below.
4 FeS + 7O2 → 2 Fe2O3 + 4 SO2
2 SO2 + O2 → 2 SO3
SO3 + H2O → H2SO4

Accepted Answer

A) 557 g 
B) 446 g 
C) 357 g 
D) 287 g 
E) 89.3 g 
A) 557 g 
B) 446 g 
C) 357 g 
D) 287 g 
E) 89.3 g

Question 6

Given the reaction:
2 KMnO4 + 10 KI + 8 H2SO4 → 6 K2SO4 + 2 MnSO4 + 5 I2 + 8 H2O
How many moles of I2 are produced by reacting 28.0 g KMnO4,18.0 g KI,and 46.0 g H2SO4?

Accepted Answer

A) 0.108 mol 
B) 0.0542 mol 
C) 0.293 mol 
D) 0.443 mol 
E) 0.886 mol 
A) 0.108 mol 
B) 0.0542 mol 
C) 0.293 mol 
D) 0.443 mol 
E) 0.886 mol

Question 7

The numbers in front of formulas in balanced equations are called stoichiometric coefficients.

Accepted Answer

A) True 
 B)False

Question 8

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas.How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

Accepted Answer

A) 0.275 g 
B) 3.64 g 
C) 7.27 g 
D) 14.5 g 
A) 0.275 g 
B) 3.64 g 
C) 7.27 g 
D) 14.5 g

Question 9

When the equation CS2 + Cl2 → CCl4 + S2Cl2 is balanced with the smallest integer coefficients,the sum of the coefficients is:

Accepted Answer

A) 5 
B) 6 
C) 4 
D) 3 
E) 7 
A) 5 
B) 6 
C) 4 
D) 3 
E) 7

Question 10

Our task is to measure the volume of blood in an elephant.One way to do this would be to drain its blood into a suitable container.Aside from harmful side effects which this method has on the elephant,it will not be successful,as blood will still remain behind in the tissues.Hence,we will inject 2.00 ml of a 2.00 M solution of a dye which the elephant will not appreciably metabolize or excrete in one hour and then measure the concentration of this dye in the bloodstream (our sample being taken from another leg than the point of injection)after 30 minutes,a sufficient time to thoroughly mix the dye in the bloodstream.The concentration of dye at this point is  
What is the volume of blood in the elephant?

Accepted Answer

A) 320 L 
B) 320000 L 
C) 3.2 L 
D) 80 L 
E) 800 L 
A) 320 L 
B) 320000 L 
C) 3.2 L 
D) 80 L 
E) 800 L

Question 11

How many moles of CuO can be produced from 0.900 mol of Cu2O in the following reaction?
2 Cu2O(s)+ O2(g)→ 4 CuO(s)

Accepted Answer

A) 0.450 mol 
B) 0.900 mol 
C) 1.80 mol 
D) 3.60 mol 
A) 0.450 mol 
B) 0.900 mol 
C) 1.80 mol 
D) 3.60 mol

Question 12

Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2 Mg(s)+ O2(g)→ 2 MgO(s)
How many moles of O2 Are consumed when 0.770 mol of magnesium burns?

Accepted Answer

A) 0.0317 mol 
B) 2.60 mol 
C) 0.770 mol 
D) 1.54 mol 
E) 0.385 mol 
A) 0.0317 mol 
B) 2.60 mol 
C) 0.770 mol 
D) 1.54 mol 
E) 0.385 mol

Question 13

How many millilitres of 0.200 mol L-1 FeCl3(aq)are needed to react with an excess of Na2S(aq)to produce 1.38 g of Fe2S3 if the percent yield for the reaction is 65.0%?
3 Na2S(aq)+ 2 FeCl3(aq)→ Fe2S3(s)+ 6 NaCl(aq)

Accepted Answer

A) 25.5 mL 
B) 43.1 mL 
C) 51.1 mL 
D) 102 mL 
A) 25.5 mL 
B) 43.1 mL 
C) 51.1 mL 
D) 102 mL

Question 14

To measure the volume of an irregularly shaped container filled with water,1.00 mL of 2.00 M potassium chloride solution is added.After stirring,a 5.00 mL sample was removed from the container and found to contain 2.54 × 10-2 mg of potassium ion.What is the volume of the container?

Accepted Answer

A) 15.4 L 
B) 29.4 L 
C) 2.94 × 104 L 
D) 3.97 × 10-4 L 
E) 2.54 L 
A) 15.4 L 
B) 29.4 L 
C) 2.94 × 104 L 
D) 3.97 × 10-4 L 
E) 2.54 L

Question 15

What mass of MgCl2 in grams must be added to 250.0 mL of a 0.25 M MgCl2 solution to produce a 0.40 M solution,assuming no change of volume upon addition?

Accepted Answer

A) 9.5 g 
B) 6.0 g 
C) 2.2 g 
D) 3.6 g 
E) 19 g 
A) 9.5 g 
B) 6.0 g 
C) 2.2 g 
D) 3.6 g 
E) 19 g

Question 16

Pure acetic acid ( CH3COOH)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25 °C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25 °C is 1.05 g mL-1.

Accepted Answer

A) 1.26 × 103 mol L-1 
B) 21.0 mol L-1 
C) 0.0210 mol L-1 
D) 0.350 mol L-1 
E) 3.50 × 10-4 mol L-1 
A) 1.26 × 103 mol L-1 
B) 21.0 mol L-1 
C) 0.0210 mol L-1 
D) 0.350 mol L-1 
E) 3.50 × 10-4 mol L-1

Question 17

When the equation Fe2(C2O4)3 → FeC2O4 + CO2 is balanced with the smallest integer coefficients,the coefficient of CO2 is:

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 3 
E) 5 
A) 1 
B) 2 
C) 4 
D) 3 
E) 5

Question 18

What is the concentration of an AlCl3(aq) solution if 150 mL of the solution contains 450 mg of Cl- ion?

Accepted Answer

A) 2.82 × 10-2 mol L-1 
B) 6.75 × 10-2 mol L-1 
C) 8.46 × 10-2 mol L-1 
D) 2.54 × 10-1 mol L-1 
A) 2.82 × 10-2 mol L-1 
B) 6.75 × 10-2 mol L-1 
C) 8.46 × 10-2 mol L-1 
D) 2.54 × 10-1 mol L-1

Question 19

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients?
C2H6 + O2 → CO2 + H2O

Accepted Answer

A) 5 
B) 10 
C) 19 
D) 21 
E) 25 
A) 5 
B) 10 
C) 19 
D) 21 
E) 25

Question 20

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients?
Al + Fe2O3 → Al2O3 + Fe

Accepted Answer

A) 4 
B) 6 
C) 12 
D) 9 
E) 8 
A) 4 
B) 6 
C) 12 
D) 9 
E) 8

Exam 4: Chemical Reactions

What mass of water is produced in the metathesis reaction 75.2 g Zn(OH)2 with 43.4 g HCl?

What is the concentration (M)of a NaCl solution prepared by dissolving 7.2 g of NaCl in sufficient water to give 425 mL of solution?

Molarity is defined as moles of solute per kg of solution.

Consider the equation: 2 Na + 2 H2O → 2 NaOH + H2 If 92.0 g of sodium is reacted with 76.0 g of water until the reaction goes to completion,which reactant will remain and in what quantity?

How many grams of sulfuric acid,H2SO4,can be obtained from 400 grams of iron ore if the ore is 80.0% by mass FeS? The reactions involved are given below. 4 FeS + 7O2 → 2 Fe2O3 + 4 SO2 2 SO2 + O2 → 2 SO3 SO3 + H2O → H2SO4

Given the reaction: 2 KMnO4 + 10 KI + 8 H2SO4 → 6 K2SO4 + 2 MnSO4 + 5 I2 + 8 H2O How many moles of I2 are produced by reacting 28.0 g KMnO4,18.0 g KI,and 46.0 g H2SO4?

The numbers in front of formulas in balanced equations are called stoichiometric coefficients.

Dinitrogen monoxide gas decomposes to form nitrogen gas and oxygen gas.How many grams of oxygen are formed when 10.0 g of dinitrogen monoxide decomposes?

When the equation CS2 + Cl2 → CCl4 + S2Cl2 is balanced with the smallest integer coefficients,the sum of the coefficients is:

How many moles of CuO can be produced from 0.900 mol of Cu2O in the following reaction? 2 Cu2O(s)+ O2(g)→ 4 CuO(s)

Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2 Mg(s)+ O2(g)→ 2 MgO(s) How many moles of O2 Are consumed when 0.770 mol of magnesium burns?

How many millilitres of 0.200 mol L-1 FeCl3(aq)are needed to react with an excess of Na2S(aq)to produce 1.38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq)+ 2 FeCl3(aq)→ Fe2S3(s)+ 6 NaCl(aq)

To measure the volume of an irregularly shaped container filled with water,1.00 mL of 2.00 M potassium chloride solution is added.After stirring,a 5.00 mL sample was removed from the container and found to contain 2.54 × 10-2 mg of potassium ion.What is the volume of the container?

What mass of MgCl2 in grams must be added to 250.0 mL of a 0.25 M MgCl2 solution to produce a 0.40 M solution,assuming no change of volume upon addition?

Pure acetic acid ( CH3COOH)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25 °C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25 °C is 1.05 g mL-1.

When the equation Fe2(C2O4)3 → FeC2O4 + CO2 is balanced with the smallest integer coefficients,the coefficient of CO2 is:

What is the concentration of an AlCl3(aq) solution if 150 mL of the solution contains 450 mg of Cl- ion?

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? C2H6 + O2 → CO2 + H2O

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? Al + Fe2O3 → Al2O3 + Fe

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

What mass of water is produced in the metathesis reaction 75.2 g Zn(OH)₂ with 43.4 g HCl?

Consider the equation: 2 Na + 2 H₂O → 2 NaOH + H₂ If 92.0 g of sodium is reacted with 76.0 g of water until the reaction goes to completion,which reactant will remain and in what quantity?

How many grams of sulfuric acid,H₂SO₄,can be obtained from 400 grams of iron ore if the ore is 80.0% by mass FeS? The reactions involved are given below. 4 FeS + 7O₂ → 2 Fe₂O₃ + 4 SO₂ 2 SO₂ + O₂ → 2 SO₃ SO₃ + H₂O → H₂SO₄

Given the reaction: 2 KMnO₄ + 10 KI + 8 H₂SO₄ → 6 K₂SO₄ + 2 MnSO₄ + 5 I₂ + 8 H₂O How many moles of I₂ are produced by reacting 28.0 g KMnO₄,18.0 g KI,and 46.0 g H₂SO₄?

When the equation CS₂ + Cl₂ → CCl₄ + S₂Cl₂ is balanced with the smallest integer coefficients,the sum of the coefficients is:

How many moles of CuO can be produced from 0.900 mol of Cu₂O in the following reaction? 2 Cu₂O(s)+ O₂(g)→ 4 CuO(s)

Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2 Mg(s)+ O₂(g)→ 2 MgO(s) How many moles of O₂ Are consumed when 0.770 mol of magnesium burns?

How many millilitres of 0.200 mol L^-1 FeCl₃(aq)are needed to react with an excess of Na₂S(aq)to produce 1.38 g of Fe₂S₃ if the percent yield for the reaction is 65.0%? 3 Na₂S(aq)+ 2 FeCl₃(aq)→ Fe₂S₃(s)+ 6 NaCl(aq)

To measure the volume of an irregularly shaped container filled with water,1.00 mL of 2.00 M potassium chloride solution is added.After stirring,a 5.00 mL sample was removed from the container and found to contain 2.54 × 10^-2mg of potassium ion.What is the volume of the container?

What mass of MgCl₂ in grams must be added to 250.0 mL of a 0.25 M MgCl₂ solution to produce a 0.40 M solution,assuming no change of volume upon addition?

Pure acetic acid ( CH₃COOH)is a liquid and is known as glacial acetic acid.Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25 °C in sufficient water to give 500.0 mL of solution.The density of glacial acetic acid at 25 °C is 1.05 g mL^-1.

When the equation Fe₂(C₂O₄)₃ → FeC₂O₄ + CO₂ is balanced with the smallest integer coefficients,the coefficient of CO₂ is:

What is the concentration of an AlCl_3(aq) solution if 150 mL of the solution contains 450 mg of Cl^- ion?

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? C₂H₆ + O₂ → CO₂ + H₂O

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? Al + Fe₂O₃ → Al₂O₃ + Fe