AP Chemistry - Unit 2 Review

Front

What type of alloy is bronze?

Back

Substitutional alloy.

Front

What is the melting point and conductivity of KCl?

Back

KCl melts at 750°C, is brittle, and does not conduct electricity.

Front

Which molecule is nonpolar: CH3F, CF4, or HF?

Back

CF4 is nonpolar.

Front

How many pi bonds are present in capsaicin?

Back

Capsaicin has 5 pi bonds.

Front

Which molecule does not have resonance structures: H2O, O3, HCN, or SO3?

Back

H2O does not have resonance structures.

Front

Define a substitutional alloy.

Back

A substitutional alloy is formed when some of the atoms in the original metallic solid are replaced by other metal atoms of similar size.

Front

What is the significance of melting point in identifying substances?

Back

The melting point helps identify substances based on their physical properties, indicating the strength of intermolecular forces.

Front

Explain the concept of polarity in molecules.

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond, affecting physical properties like solubility and boiling point.

Front

What is resonance in chemistry?

Back

Resonance is a way of describing delocalized electrons within certain molecules where the bonding cannot be expressed by a single Lewis structure.

Front

How do you determine if a molecule is polar or nonpolar?

Back

A molecule is polar if it has a net dipole moment due to the arrangement of polar bonds; nonpolar molecules have symmetrical charge distribution.