According to the following reaction, what amount of Al2S3 remains when 20.00 g of Al2S3 and 2.00 g of H2O are reacted? A few of the molar masses are as follows: Al2S3 = 150.17 g mol-1, H2O = 18.02 g mol-1. Al2S3(s) + 6H2O(l) → 2Al(OH)3(s) + 3H2S(g)

A) 28.33 g B) 14.00 g C) 8.33 g D) 19.78 g E) 17.22 g A) 28.33 g B) 14.00 g C) 8.33 g D) 19.78 g E) 17.22 g

When 31.2 mL of 0.500 mol L-1 AgNO3 is added to 25.0 mL of 0.300 mol L-1 NH4Cl, how many grams of AgCl are formed? AgNO3(aq) + NH4Cl(aq) → AgCl(s) + NH4NO3(aq)

A) 1.07 g B) 2.24 g C) 3.31 g D) 6.44 g A) 1.07 g B) 2.24 g C) 3.31 g D) 6.44 g

Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N2O4 and 45.0 g N2H4. Some possibly useful molar masses are as follows: N2O4 = 92.02 g mol-1, N2H4 = 32.05 g mol-1. N2O4(l) + 2N2H4(l) → 3N2(g) + 4H2O(g)

A) LR = N2H4, 59.0 g N2 formed B) LR = N2O4, 105 g N2 formed C) LR = N2O4, 45.7 g N2 formed D) LR = N2H4, 13.3 g N2 formed E) No LR, 45.0 g N2 formed A) LR = N2H4, 59.0 g N2 formed B) LR = N2O4, 105 g N2 formed C) LR = N2O4, 45.7 g N2 formed D) LR = N2H4, 13.3 g N2 formed E) No LR, 45.0 g N2 formed

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) + 3O2(g) → 2CO2(g) + 3H2O(l)

A) 6.19 mL B) 9.95 mL C) 19.9 mL D) 8 39.8 mL A) 6.19 mL B) 9.95 mL C) 19.9 mL D) 8 39.8 mL

A FeCl3 solution is 0.175 mol L-1. How many mL of a 0.175 mol L-1 FeCl3 solution are needed to make 450. mL of a solution that is 0.300 mol L-1 in Cl- ion?

A) 0.771 mL B) 257 mL C) 771 mL D) It is not possible to make a more concentrated solution from a less concentrated solution. A) 0.771 mL B) 257 mL C) 771 mL D) It is not possible to make a more concentrated solution from a less concentrated solution.

Exam 4: Chemical Reactions and Stoichiometry

What is the molarity of a potassium triiodide solution, KI₃(aq), if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0. 200 mol L^-1 thiosulfate solution, K₂S₂O₃(aq)? The chemical equation for the reaction is: 2S₂O₃^2-(aq) + I₃^-(aq) → S₄O₆^2-(aq) + 3I^-(aq)

Free

(Multiple Choice)

4.9/5

(34)

Question 1

Correct Answer:

Verified

Identify the location of reduction in an electrochemical cell.

Free

(Multiple Choice)

4.8/5

(41)

Question 2

Correct Answer:

Verified

Define a spectator ion.

Free

(Short Answer)

4.8/5

(34)

Question 3

Correct Answer:

Verified

An ion that does not participate in the reaction.

What is the oxidation number of the chromium atom in K₂CrO₄?

(Multiple Choice)

4.9/5

(33)

Question 4

How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s) + Al³⁺(aq) → Al(s) + Mg²⁺(aq)

(Multiple Choice)

4.9/5

(39)

Question 5

Which one of the following compounds behaves as an acid when dissolved in water?

(Multiple Choice)

4.9/5

(35)

Question 6

How many millilitres of 0.550 mol L^-1 hydriodic acid are needed to react with 15.00 mL of 0.217 mol L^-1 CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H₂O(l)

(Multiple Choice)

4.8/5

(38)

Question 7

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L^-1 Ca(NO₃)₂ solution to 150.0 mL.

(Multiple Choice)

4.9/5

(36)

Question 8

Which of the following describes NaCl?

(Multiple Choice)

4.8/5

(28)

Question 9

According to the following reaction, what amount of Al₂S₃ remains when 20.00 g of Al₂S₃ and 2.00 g of H₂O are reacted? A few of the molar masses are as follows: Al₂S₃= 150.17 g mol^-1, H₂O = 18.02 g mol^-1. Al₂S₃(s) + 6H₂O(l) → 2Al(OH)₃(s) + 3H₂S(g)

(Multiple Choice)

4.8/5

(30)

Question 10

Describe the difference between complete ionic and net ionic equations.

(Essay)

4.9/5

(37)

Question 11

When 31.2 mL of 0.500 mol L^-1 AgNO₃ is added to 25.0 mL of 0.300 mol L^-1 NH₄Cl, how many grams of AgCl are formed? AgNO₃(aq) + NH₄Cl(aq) → AgCl(s) + NH₄NO₃(aq)

(Multiple Choice)

4.9/5

(41)

Question 12

Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N₂O₄ and 45.0 g N₂H₄. Some possibly useful molar masses are as follows: N₂O₄ = 92.02 g mol^-1, N₂H₄ = 32.05 g mol^-1. N₂O₄(l) + 2N₂H₄(l) → 3N₂(g) + 4H₂O(g)

(Multiple Choice)

4.7/5

(38)

Question 13

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) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)

(Multiple Choice)

4.9/5

(27)

Question 14

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K₂S and Fe(NO₃)₂ are mixed.

(Multiple Choice)

4.9/5

(42)

Question 15

Which of the following describes HCl?

(Multiple Choice)

4.7/5

(35)

Question 16

What is the concentration (M) of CH₃OH in a solution prepared by dissolving 16.8 g of CH₃OH in sufficient water to give exactly 230 mL of solution?

(Short Answer)

4.8/5

(34)

Question 17

What are the required coefficients to properly balance the following chemical reaction? NO(g) + H₂O(g) → NH₃(g) + O₂(g)

(Multiple Choice)

4.7/5

(40)

Question 18

Which of the following is considered a strong electrolyte?

(Multiple Choice)

4.8/5

(35)

Question 19

A FeCl₃ solution is 0.175 mol L^-1. How many mL of a 0.175 mol L^-1 FeCl₃solution are needed to make 450. mL of a solution that is 0.300 mol L^-1 in Cl^- ion?

(Multiple Choice)

4.9/5

(33)

Question 20

Showing 1 - 20 of 261

Exam 4: Chemical Reactions and Stoichiometry

What is the molarity of a potassium triiodide solution, KI3(aq), if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0. 200 mol L-1 thiosulfate solution, K2S2O3(aq)? The chemical equation for the reaction is: 2S2O32-(aq) + I3-(aq) → S4O62-(aq) + 3I-(aq)

Identify the location of reduction in an electrochemical cell.

Define a spectator ion.

What is the oxidation number of the chromium atom in K2CrO4?

How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s) + Al3+(aq) → Al(s) + Mg2+(aq)

Which one of the following compounds behaves as an acid when dissolved in water?

How many millilitres of 0.550 mol L-1 hydriodic acid are needed to react with 15.00 mL of 0.217 mol L-1 CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H2O(l)

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L-1 Ca(NO3)2 solution to 150.0 mL.

Which of the following describes NaCl?

According to the following reaction, what amount of Al2S3 remains when 20.00 g of Al2S3 and 2.00 g of H2O are reacted? A few of the molar masses are as follows: Al2S3 = 150.17 g mol-1, H2O = 18.02 g mol-1. Al2S3(s) + 6H2O(l) → 2Al(OH)3(s) + 3H2S(g)

Describe the difference between complete ionic and net ionic equations.

When 31.2 mL of 0.500 mol L-1 AgNO3 is added to 25.0 mL of 0.300 mol L-1 NH4Cl, how many grams of AgCl are formed? AgNO3(aq) + NH4Cl(aq) → AgCl(s) + NH4NO3(aq)

Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N2O4 and 45.0 g N2H4. Some possibly useful molar masses are as follows: N2O4 = 92.02 g mol-1, N2H4 = 32.05 g mol-1. N2O4(l) + 2N2H4(l) → 3N2(g) + 4H2O(g)

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) + 3O2(g) → 2CO2(g) + 3H2O(l)

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3)2 are mixed.

Which of the following describes HCl?

What is the concentration (M) of CH3OH in a solution prepared by dissolving 16.8 g of CH3OH in sufficient water to give exactly 230 mL of solution?

What are the required coefficients to properly balance the following chemical reaction? NO(g) + H2O(g) → NH3(g) + O2(g)

Which of the following is considered a strong electrolyte?

A FeCl3 solution is 0.175 mol L-1. How many mL of a 0.175 mol L-1 FeCl3 solution are needed to make 450. mL of a solution that is 0.300 mol L-1 in Cl- ion?

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

What is the oxidation number of the chromium atom in K₂CrO₄?

How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s) + Al³⁺(aq) → Al(s) + Mg²⁺(aq)

How many millilitres of 0.550 mol L^-1 hydriodic acid are needed to react with 15.00 mL of 0.217 mol L^-1 CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H₂O(l)

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L^-1 Ca(NO₃)₂ solution to 150.0 mL.

According to the following reaction, what amount of Al₂S₃ remains when 20.00 g of Al₂S₃ and 2.00 g of H₂O are reacted? A few of the molar masses are as follows: Al₂S₃= 150.17 g mol^-1, H₂O = 18.02 g mol^-1. Al₂S₃(s) + 6H₂O(l) → 2Al(OH)₃(s) + 3H₂S(g)

When 31.2 mL of 0.500 mol L^-1 AgNO₃ is added to 25.0 mL of 0.300 mol L^-1 NH₄Cl, how many grams of AgCl are formed? AgNO₃(aq) + NH₄Cl(aq) → AgCl(s) + NH₄NO₃(aq)

Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N₂O₄ and 45.0 g N₂H₄. Some possibly useful molar masses are as follows: N₂O₄ = 92.02 g mol^-1, N₂H₄ = 32.05 g mol^-1. N₂O₄(l) + 2N₂H₄(l) → 3N₂(g) + 4H₂O(g)

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) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)

Identify the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K₂S and Fe(NO₃)₂ are mixed.

What is the concentration (M) of CH₃OH in a solution prepared by dissolving 16.8 g of CH₃OH in sufficient water to give exactly 230 mL of solution?

What are the required coefficients to properly balance the following chemical reaction? NO(g) + H₂O(g) → NH₃(g) + O₂(g)

A FeCl₃ solution is 0.175 mol L^-1. How many mL of a 0.175 mol L^-1 FeCl₃solution are needed to make 450. mL of a solution that is 0.300 mol L^-1 in Cl^- ion?