If the density of ethanol,C2H5OH,is 0.789 g mL-1.How many millilitres of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation? C2H5OH(l)+ 3 O2(g)→ 2 CO2(g)+ 3 H2O(l)

A) 6.19 mL B) 9.95 mL C) 19.9 mL D) 39.8 mL A) 6.19 mL B) 9.95 mL C) 19.9 mL D) 39.8 mL

When the equation K2S2O3 + I2 → K2S4O6 + KI is balanced with the smallest integer coefficients,the coefficient of KI is:

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

Given the reaction: P4(l)+ 6 Cl2(g)→ 4 PCl3(l) If the percent yield is 82%,what mass of P4 is required to obtain 2.30 g PCl3 (Cl2 in excess)?

A) 0.63 g B) 0.52 g C) 0.43 g D) 0.16 g E) 0.95 g A) 0.63 g B) 0.52 g C) 0.43 g D) 0.16 g E) 0.95 g

If 0.500 mol of CaCl2 is mixed with 0.200 mol Na3PO4,the maximum amount in moles of Ca3(PO4)2 that can be formed is 0.10 moles.Calculate the extent of reaction ,x.

A) 0.2 B) 0.10 C) 0.35 D) 0 E) 0.65 A) 0.2 B) 0.10 C) 0.35 D) 0 E) 0.65

In the following reaction: 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g) 14.0 g KClO3 yielded 1.40 g KCl.What is the percent yield?

A) 6.08% B) 16.4% C) 11.0% D) 32.9% E) 10.0% A) 6.08% B) 16.4% C) 11.0% D) 32.9% E) 10.0%

The chemical reaction occurring during the discharge of a lead storage battery can be represented by the equation: Pb(s)+ PbO2(s)+ 2 H2SO4(aq)→ 2 PbSO4(s)+ 2 H2O(l) Which is the limiting reagent and the amount of PbSO4 produced if 39.8 g of Pb,57.9 g of PbO2, and 352 mL of 0.375 M solution of H2SO4 is used?

A) limiting reagent PbO2,146 g PbSO4 B) limiting reagent Pb,58.2 g PbSO4 C) limiting reagent Pb,116 g PbSO4 D) limiting reagent H2SO4,80.0 g PbSO4 E) limiting reagent H2SO4,40.0 g PbSO4 A) limiting reagent PbO2,146 g PbSO4 B) limiting reagent Pb,58.2 g PbSO4 C) limiting reagent Pb,116 g PbSO4 D) limiting reagent H2SO4,80.0 g PbSO4 E) limiting reagent H2SO4,40.0 g PbSO4

How many grams of CrSO4 will be made from 25.0 grams each of Zn,K2Cr2O7,and H2SO4? 4 Zn + K2Cr2O7 + 7 H2SO4 → 4 ZnSO4 + 2 CrSO4 + K2SO4 + 7 H2O

A) 10.8 g B) 28.3 g C) 25.2 g D) 12.6 g E) 37.8 g A) 10.8 g B) 28.3 g C) 25.2 g D) 12.6 g E) 37.8 g

Exam 4: Chemical Reactions

If the density of ethanol,C₂H₅OH,is 0.789 g mL^-1.How many millilitres of ethanol are needed to produce 15.0 g of CO₂ according to the following chemical equation? C₂H₅OH(l)+ 3 O₂(g)→ 2 CO₂(g)+ 3 H₂O(l)

(Multiple Choice)

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Question 141

When the equation K₂S₂O₃ + I₂ → K₂S₄O₆ + KI is balanced with the smallest integer coefficients,the coefficient of KI is:

(Multiple Choice)

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Question 142

Given the reaction: P₄(l)+ 6 Cl₂(g)→ 4 PCl₃(l) If the percent yield is 82%,what mass of P₄ is required to obtain 2.30 g PCl₃ (Cl₂ in excess)?

(Multiple Choice)

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Question 143

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? PCl₃(l)+ Cl₂(g)+ P₄O₁₀(s)→ POCl₃(l)

(Multiple Choice)

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Question 144

If 0.500 mol of CaCl₂ is mixed with 0.200 mol Na₃PO₄,the maximum amount in moles of Ca₃(PO₄)₂ that can be formed is 0.10 moles.Calculate the extent of reaction ,x.

(Multiple Choice)

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Question 145

In the following reaction: 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g) 14.0 g KClO₃ yielded 1.40 g KCl.What is the percent yield?

(Multiple Choice)

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Question 146

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? H₂(g)+ O₂(g)→ H₂O(l)

(Multiple Choice)

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Question 147

In a balanced equation,the number of atoms of each element in the products must equal to the number of atoms of each element in the reactants.

(True/False)

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Question 148

Consider the gaseous reaction: N₂H₄(g)+ 3 O₂(g)→ 2 NO₂(g)+ 2 H₂O(g) If the above reaction has a percent yield of 98.5%,what mass in grams of oxygen is needed to produce 49.0 g of NO₂(g),assuming an excess of N₂H₄?

(Multiple Choice)

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Question 149

The chemical reaction occurring during the discharge of a lead storage battery can be represented by the equation: Pb(s)+ PbO₂(s)+ 2 H₂SO₄(aq)→ 2 PbSO₄(s)+ 2 H₂O(l) Which is the limiting reagent and the amount of PbSO₄ produced if 39.8 g of Pb,57.9 g of PbO_2, and 352 mL of 0.375 M solution of H₂SO₄ is used?

(Multiple Choice)

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Question 150

If an aqueous solution containing 46 g of sodium carbonate per liter is mixed with an equal volume of 0.20 M aqueous hydrochloric acid,what would be the molarity of sodium chloride in the final solution,assuming volumes were additive?

(Multiple Choice)

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Question 151

If 5.97 mL of a solution of NaCl contains 2.54 mg of sodium ion,what is the molarity of the sodium chloride solution?

(Multiple Choice)

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Question 152

How many mL of 0.024 M solution can be produced from 14.1 mL of 3.0 M solution?

(Multiple Choice)

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Question 153

"Washing soda" (sodium carbonate)may be used to "soften" water by the removal of certain ions that would otherwise react with common soaps.When the "hardness" is due to calcium ion,the "softening" process may be represented as: Ca²⁺(aq)+ CO₃^2-(aq)→ CaCO₃(s) What mass of sodium carbonate would be required to remove essentially all of the calcium ion from 750 L of solution containing 43 mg Ca²⁺ per liter?

(Multiple Choice)

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Question 154

How many millilitres of a stock solution of 11.1 mol L^-1 (aq) would be needed to prepare 0.500 L of 0.500 mol L^-1 ?

(Multiple Choice)

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Question 155

Gases emitted during volcanic activity often contain high concentrations of hydrogen sulfide and sulfur dioxide.These gases may react to produce deposits of sulfur according to the equation: For the complete reaction of 6.41 mol of hydrogen sulfide:

(Multiple Choice)

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Question 156

You have 10.00 L of a 0.350 M KCl solution,but you need a solution that is 0.450 M.What volume of water,in L,would you evaporate from the solution?

(Multiple Choice)

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Question 157

How many grams of CrSO₄ will be made from 25.0 grams each of Zn,K₂Cr₂O₇,and H₂SO₄? 4 Zn + K₂Cr₂O₇ + 7 H₂SO₄ → 4 ZnSO₄ + 2 CrSO₄ + K₂SO₄ + 7 H₂O

(Multiple Choice)

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Question 158

What mass of oxygen gas would be consumed by the complete combustion of 7.5 g of a mixture of propane (C₃H₈)and butane (C₄H₁₀)in the mole ratio of

(Multiple Choice)

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Question 159

What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest,whole-number coefficients? CH₁₄O(l)+ O₂(g)→ CO₂(g)+ H₂O(l)

(Multiple Choice)

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Question 160

Showing 141 - 160 of 170

Exam 4: Chemical Reactions

If the density of ethanol,C2H5OH,is 0.789 g mL-1.How many millilitres of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation? C2H5OH(l)+ 3 O2(g)→ 2 CO2(g)+ 3 H2O(l)

When the equation K2S2O3 + I2 → K2S4O6 + KI is balanced with the smallest integer coefficients,the coefficient of KI is:

Given the reaction: P4(l)+ 6 Cl2(g)→ 4 PCl3(l) If the percent yield is 82%,what mass of P4 is required to obtain 2.30 g PCl3 (Cl2 in excess)?

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? PCl3(l)+ Cl2(g)+ P4O10(s)→ POCl3(l)

If 0.500 mol of CaCl2 is mixed with 0.200 mol Na3PO4,the maximum amount in moles of Ca3(PO4)2 that can be formed is 0.10 moles.Calculate the extent of reaction ,x.

In the following reaction: 2 KClO3(s)→ 2 KCl(s)+ 3 O2(g) 14.0 g KClO3 yielded 1.40 g KCl.What is the percent yield?

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? H2(g)+ O2(g)→ H2O(l)

In a balanced equation,the number of atoms of each element in the products must equal to the number of atoms of each element in the reactants.

Consider the gaseous reaction: N2H4(g)+ 3 O2(g)→ 2 NO2(g)+ 2 H2O(g) If the above reaction has a percent yield of 98.5%,what mass in grams of oxygen is needed to produce 49.0 g of NO2(g),assuming an excess of N2H4?

If an aqueous solution containing 46 g of sodium carbonate per liter is mixed with an equal volume of 0.20 M aqueous hydrochloric acid,what would be the molarity of sodium chloride in the final solution,assuming volumes were additive?

If 5.97 mL of a solution of NaCl contains 2.54 mg of sodium ion,what is the molarity of the sodium chloride solution?

How many mL of 0.024 M solution can be produced from 14.1 mL of 3.0 M solution?

How many millilitres of a stock solution of 11.1 mol L-1 (aq) would be needed to prepare 0.500 L of 0.500 mol L-1 ?

Gases emitted during volcanic activity often contain high concentrations of hydrogen sulfide and sulfur dioxide.These gases may react to produce deposits of sulfur according to the equation: For the complete reaction of 6.41 mol of hydrogen sulfide:

You have 10.00 L of a 0.350 M KCl solution,but you need a solution that is 0.450 M.What volume of water,in L,would you evaporate from the solution?

How many grams of CrSO4 will be made from 25.0 grams each of Zn,K2Cr2O7,and H2SO4? 4 Zn + K2Cr2O7 + 7 H2SO4 → 4 ZnSO4 + 2 CrSO4 + K2SO4 + 7 H2O

What mass of oxygen gas would be consumed by the complete combustion of 7.5 g of a mixture of propane (C3H8)and butane (C4H10)in the mole ratio of

What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest,whole-number coefficients? ________ CH14O(l)+ ________ O2(g)→ ________ CO2(g)+ ________ H2O(l)

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

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If the density of ethanol,C₂H₅OH,is 0.789 g mL^-1.How many millilitres of ethanol are needed to produce 15.0 g of CO₂ according to the following chemical equation? C₂H₅OH(l)+ 3 O₂(g)→ 2 CO₂(g)+ 3 H₂O(l)

When the equation K₂S₂O₃ + I₂ → K₂S₄O₆ + KI is balanced with the smallest integer coefficients,the coefficient of KI is:

Given the reaction: P₄(l)+ 6 Cl₂(g)→ 4 PCl₃(l) If the percent yield is 82%,what mass of P₄ is required to obtain 2.30 g PCl₃ (Cl₂ in excess)?

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? PCl₃(l)+ Cl₂(g)+ P₄O₁₀(s)→ POCl₃(l)

If 0.500 mol of CaCl₂ is mixed with 0.200 mol Na₃PO₄,the maximum amount in moles of Ca₃(PO₄)₂ that can be formed is 0.10 moles.Calculate the extent of reaction ,x.

In the following reaction: 2 KClO₃(s)→ 2 KCl(s)+ 3 O₂(g) 14.0 g KClO₃ yielded 1.40 g KCl.What is the percent yield?

What is the sum of the coefficients when the following is balanced with the smallest integer coefficients? H₂(g)+ O₂(g)→ H₂O(l)

Consider the gaseous reaction: N₂H₄(g)+ 3 O₂(g)→ 2 NO₂(g)+ 2 H₂O(g) If the above reaction has a percent yield of 98.5%,what mass in grams of oxygen is needed to produce 49.0 g of NO₂(g),assuming an excess of N₂H₄?

How many millilitres of a stock solution of 11.1 mol L^-1 (aq) would be needed to prepare 0.500 L of 0.500 mol L^-1 ?

How many grams of CrSO₄ will be made from 25.0 grams each of Zn,K₂Cr₂O₇,and H₂SO₄? 4 Zn + K₂Cr₂O₇ + 7 H₂SO₄ → 4 ZnSO₄ + 2 CrSO₄ + K₂SO₄ + 7 H₂O

What mass of oxygen gas would be consumed by the complete combustion of 7.5 g of a mixture of propane (C₃H₈)and butane (C₄H₁₀)in the mole ratio of

What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest,whole-number coefficients? CH₁₄O(l)+ O₂(g)→ CO₂(g)+ H₂O(l)