Question 1

What is the general term for the process in which a chemical species loses electrons?

Accepted Answer

A) oxidation 
B) reduction 
C) condensation 
D) Lewis base 
E) decomposition 
A) oxidation 
B) reduction 
C) condensation 
D) Lewis base 
E) decomposition

Question 2

Which statement best describes the Law of Conservation of Mass?

Accepted Answer

A) The masses of the reactants in a chemical reaction are always equal. 
B) The mass of the product formed in a chemical reaction is determined by the limiting reactant. 
C) The mass of the product formed in a chemical reaction is equal to the mass of the reactant in the smallest amount. 
D) Matter is neither gained nor lost in a chemical reaction. 
E) When two or more products are formed in a chemical reaction, their masses will always be equal. 
A) The masses of the reactants in a chemical reaction are always equal. 
B) The mass of the product formed in a chemical reaction is determined by the limiting reactant. 
C) The mass of the product formed in a chemical reaction is equal to the mass of the reactant in the smallest amount. 
D) Matter is neither gained nor lost in a chemical reaction. 
E) When two or more products are formed in a chemical reaction, their masses will always be equal.

Question 3

Choose the best classification of the reaction represented by the following equation: BaCl2(aq) + K2SO4(aq) → BaSO4(s) + 2KCl(aq)

Accepted Answer

A) single-replacement 
B) double-replacement 
C) combination 
D) decomposition 
E) oxidation-reduction 
A) single-replacement 
B) double-replacement 
C) combination 
D) decomposition 
E) oxidation-reduction

Question 4

Methanol (CH3OH) is the fuel used by racecars in the Indianapolis 500.It burns in the engine according to the equation below.How many moles of oxygen gas are necessary to react completely with 12.5 L of methanol? [Density: CH3OH, 0.7910g/mL; Molar mass: CH3OH, 32.05 g/mol] 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(g)

Accepted Answer

A) 0.462 mol 
B) 2.16 mol 
C) 463 mol 
D) 740 mol 
E) 1850 mol 
A) 0.462 mol 
B) 2.16 mol 
C) 463 mol 
D) 740 mol 
E) 1850 mol

Question 5

The law of conservation of mass states that matter cannot be gained or lost during a chemical reaction.

Accepted Answer

A) True 
 B)False

What is the general term for the process in which a chemical species loses electrons?

Which statement best describes the Law of Conservation of Mass?

Choose the best classification of the reaction represented by the following equation: BaCl₂(aq) + K₂SO₄(aq) → BaSO₄(s) + 2KCl(aq)

The law of conservation of mass states that matter cannot be gained or lost during a chemical reaction.

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

Exam 4: Calculations, Chemical Changes, and the Chemical Equation

What is the general term for the process in which a chemical species loses electrons?

Which statement best describes the Law of Conservation of Mass?

Choose the best classification of the reaction represented by the following equation: BaCl2(aq) + K2SO4(aq) → BaSO4(s) + 2KCl(aq)

The law of conservation of mass states that matter cannot be gained or lost during a chemical reaction.

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

Choose the best classification of the reaction represented by the following equation: BaCl₂(aq) + K₂SO₄(aq) → BaSO₄(s) + 2KCl(aq)