Question 1

How many moles are in 1.50 g of ethanol,CH3CH2OH?

Accepted Answer

A) 0)0145 mol 
B) 0)0326 mol 
C) 30.7 mol 
D) 69.0 mol 
A) 0)0145 mol 
B) 0)0326 mol 
C) 30.7 mol 
D) 69.0 mol

Question 2

When the reaction C3H8 + O2 → CO2 + H2O is balanced,the total number of oxygen atoms in the balanced equation is ________.

Accepted Answer

Question 3

How many grams of AgNO3 are needed to make 250.mL of a solution that is 0.135 M?

Accepted Answer

A) 0)0917 g 
B) 0)174 g 
C) 5)73 g 
D) 9)17 g 
A) 0)0917 g 
B) 0)174 g 
C) 5)73 g 
D) 9)17 g

Question 4

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

Accepted Answer

A) 2)8 × 10- 2 M 
B) 5)2 M 
C) 28 M 
D) 5)2 × 103 M 
A) 2)8 × 10- 2 M 
B) 5)2 M 
C) 28 M 
D) 5)2 × 103 M

Question 5

When methane,CH4,undergoes combustion with oxygen,the usual products are carbon dioxide and water.Carbon monoxide is formed when the limiting reactant is

Accepted Answer

A) carbon dioxide. 
B) methane. 
C) oxygen. 
D) water. 
A) carbon dioxide. 
B) methane. 
C) oxygen. 
D) water.

Question 6

When 10.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction?
Ca(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ H2(g)

Accepted Answer

A) 13.5% 
B) 27.1% 
C) 50.0% 
D) 92.4% 
A) 13.5% 
B) 27.1% 
C) 50.0% 
D) 92.4%

Question 7

The balanced equation for the decomposition of water is shown below.
2 H2O → 2 H2 + O2
If 0.72 g of water react completely in this reaction,what is the theoretical yield of H2?

Accepted Answer

Question 8

Aluminum metal reacts with iron(II)sulfide to form aluminum sulfide and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?

Accepted Answer

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

How many moles are in 1.50 g of ethanol,CH₃CH₂OH?

When the reaction C₃H₈ + O₂ → CO₂ + H₂O is balanced,the total number of oxygen atoms in the balanced equation is ________.

How many grams of AgNO₃ are needed to make 250.mL of a solution that is 0.135 M?

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

When methane,CH₄,undergoes combustion with oxygen,the usual products are carbon dioxide and water.Carbon monoxide is formed when the limiting reactant is

When 10.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction? Ca(s)+ 2 H₂O(l)→ Ca(OH)₂(aq)+ H₂(g)

The balanced equation for the decomposition of water is shown below. 2 H₂O → 2 H₂ + O₂ If 0.72 g of water react completely in this reaction,what is the theoretical yield of H₂?

Aluminum metal reacts with iron(II)sulfide to form aluminum sulfide and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Exam 3: Formulas, equations, and Moles

How many moles are in 1.50 g of ethanol,CH3CH2OH?

When the reaction C3H8 + O2 → CO2 + H2O is balanced,the total number of oxygen atoms in the balanced equation is ________.

How many grams of AgNO3 are needed to make 250.mL of a solution that is 0.135 M?

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

When methane,CH4,undergoes combustion with oxygen,the usual products are carbon dioxide and water.Carbon monoxide is formed when the limiting reactant is

When 10.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction? Ca(s)+ 2 H2O(l)→ Ca(OH)2(aq)+ H2(g)

The balanced equation for the decomposition of water is shown below. 2 H2O → 2 H2 + O2 If 0.72 g of water react completely in this reaction,what is the theoretical yield of H2?

Aluminum metal reacts with iron(II)sulfide to form aluminum sulfide and iron metal.What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

How many moles are in 1.50 g of ethanol,CH₃CH₂OH?

When the reaction C₃H₈ + O₂ → CO₂ + H₂O is balanced,the total number of oxygen atoms in the balanced equation is ________.

How many grams of AgNO₃ are needed to make 250.mL of a solution that is 0.135 M?

When methane,CH₄,undergoes combustion with oxygen,the usual products are carbon dioxide and water.Carbon monoxide is formed when the limiting reactant is

When 10.0 g of calcium metal is reacted with water,5.00 g of calcium hydroxide is produced.Using the following balanced equation,calculate the percent yield for the reaction? Ca(s)+ 2 H₂O(l)→ Ca(OH)₂(aq)+ H₂(g)

The balanced equation for the decomposition of water is shown below. 2 H₂O → 2 H₂ + O₂ If 0.72 g of water react completely in this reaction,what is the theoretical yield of H₂?