AP Chemistry Unit 3

Front

What is a hydrogen bond?

Back

A hydrogen bond is a weak attraction between a hydrogen atom covalently bonded to a highly electronegative atom (like O, N, or F) and another electronegative atom.

Front

What is the formula to calculate frequency from wavelength?

Back

v = c / λ, where v is frequency, c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength.

Front

If a gas expands at constant temperature, what happens to its pressure?

Back

According to Boyle's Law, if the volume increases, the pressure decreases, provided the temperature and amount of gas remain constant.

Front

Which substance has the weakest intermolecular forces: CH4, NaCl, H2O, or MgF2?

Back

CH4 has the weakest intermolecular forces because it is a nonpolar molecule.

Front

How does increasing pressure affect the solubility of a gas in a liquid?

Back

Increasing pressure increases the solubility of a gas in a liquid, as described by Henry's Law.

Front

What is the relationship between temperature and gas solubility?

Back

Generally, increasing temperature decreases the solubility of gases in liquids.

Front

Define intermolecular forces.

Back

Intermolecular forces are forces of attraction or repulsion between neighboring particles (atoms, molecules, or ions).

Front

What is Boyle's Law?

Back

Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature (P1V1 = P2V2).

Front

What is the significance of the speed of light in calculating frequency?

Back

The speed of light (c) is a constant used to relate the wavelength and frequency of electromagnetic radiation.

Front

What type of bond is present in NaCl?

Back

NaCl has ionic bonds, formed by the electrostatic attraction between positively charged sodium ions and negatively charged chloride ions.