AP CHEM UNIT 3

Of the three solutions listed in the table above which one, if any has the greatest electrical conductivity and why?

0.1 M KI (aq) because KI completely dissociates in water to produce ions

Of the following, the best explanation for the fact that gases are easily compresses is that the molecules in a gas

Are relatively far apart

Based on the structures shown above which of the following statements identifies the compound with the higher boiling point and provides the best explanation for the higher boiling point?

Compound 2 because it forms hydrogen bonds whereas compound 1 does not

At room temperature I2 (s) is a molecular solid which of the following provides a characteristic of I2 with a correct explanation?

It is not a good conductor of electricity because it's valence electrons are localized in bonding and nonbonding pairs

In solid methane, the forces between neighboring CH4 molecules are best characterized as

London Disperson forces

Compared to the equilibrium vapor pressure of CH3OH at 300K the equilibrium vapor pressure of C2H5OH is

Lower because London Dispersion forces among C2H5OH molecules are greater than those among CH3OH molecules

Based on the information from the table above , which of the compounds has the highest boiling point and why?

Propanic acid Because it can form intermolecular hydrogen bonds

A student is given a sample of a pure white crystalline substance. Which of the following would be most useful in providing data to determine if the substance is an ionic compound

Testing the electrical conductivity in an aqueous solution