Question

missed this? read section 11.2. you can click on the review link to go to the section in your etext. part a according to kinetic molecular theory, the particles that compose a gas: have an average kinetic energy proportional to the temperature in kelvins attract one another strongly are packed closely together—nearly touching one another all of the above

Explanation:

To solve this, we recall the Kinetic Molecular Theory (KMT) for gases:

1. Gas particles have an average kinetic energy proportional to the absolute temperature (in Kelvins) – this is a key postulate of KMT.
2. Gas particles are far apart, not packed closely (that's for solids/liquids), so the "packed closely" option is incorrect.
3. Gas particles have very weak intermolecular attractions, so "attract one another strongly" is incorrect.
4. Since only the first option ("have an average kinetic energy proportional to the temperature in kelvins") is correct based on KMT, we identify that.

Answer:

The correct option is: "have an average kinetic energy proportional to the temperature in kelvins" (the first option among the choices provided).