Question 1

What type of polymers are polyesters?

Accepted Answer

A)  Polyesters, formed via step-growth polymerization of diacids and diols, have the monomers connected through ester groups. 
B)  Polyesters, formed via step-growth polymerization of acids and diols, have the monomers connected through ester groups. 
C)  Polyesters, formed via step-growth polymerization of acids and alcohols, have the monomers connected through ester groups. 
D)  Polyesters, formed via addition polymerization of diacids and diols, have the monomers connected through ester groups. 
E)  Polyesters, formed via step-growth polymerization of diacids and diols, have the monomers connected via hydrogen bonds. 
A)  Polyesters, formed via step-growth polymerization of diacids and diols, have the monomers connected through ester groups. 
B)  Polyesters, formed via step-growth polymerization of acids and diols, have the monomers connected through ester groups. 
C)  Polyesters, formed via step-growth polymerization of acids and alcohols, have the monomers connected through ester groups. 
D)  Polyesters, formed via addition polymerization of diacids and diols, have the monomers connected through ester groups. 
E)  Polyesters, formed via step-growth polymerization of diacids and diols, have the monomers connected via hydrogen bonds.

Question 2

Which of the following is the balanced chemical equation for the addition of two equivalents of Br2 to CH3C≡CH?

Accepted Answer

A)  CH3C≡CH + 2Br2 → CH3CBr2CHBr2 
B)  CH3C≡CH + 2Br2 → CH3CBr=CHBr 
C)  CH3C≡CH + 2Br2 → CH3CH2CHBr2 
D)  CH3C≡CH + 2Br2 → CH3CBr2CH3 
E)  CH3C≡CH + 2Br2 → CH3CHBrCH2Br 
A)  CH3C≡CH + 2Br2 → CH3CBr2CHBr2 
B)  CH3C≡CH + 2Br2 → CH3CBr=CHBr 
C)  CH3C≡CH + 2Br2 → CH3CH2CHBr2 
D)  CH3C≡CH + 2Br2 → CH3CBr2CH3 
E)  CH3C≡CH + 2Br2 → CH3CHBrCH2Br

What type of polymers are polyesters?

Which of the following is the balanced chemical equation for the addition of two equivalents of Br₂ to CH₃C≡CH?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

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

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Exam 21: Organic Chemistry Ii: Reactions

What type of polymers are polyesters?

Which of the following is the balanced chemical equation for the addition of two equivalents of Br2 to CH3C≡CH?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

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

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Which of the following is the balanced chemical equation for the addition of two equivalents of Br₂ to CH₃C≡CH?