Question

oxygen reacts with many different elements to form different molecules. as the energy of matter changes, substances experience changes in their states of matter. choose the two molecules from the list below that contain the greatest kinetic energy

□ no (g)

□ sio₂ (s)

□ h₂o (l)

□ na₂o (s)

□ co (g)

Explanation:

Kinetic energy of molecules is related to their state of matter. Gaseous molecules have the highest kinetic energy as their particles move freely. Among the given options, \(NO(g)\) and \(CO(g)\) are in the gaseous state. \(SiO_{2}(s)\) and \(Na_{2}O(s)\) are solids (particles have low kinetic energy as they are in fixed positions) and \(H_{2}O(l)\) is a liquid (particles have more kinetic energy than solids but less than gases).

Answer:

NO (g), CO (g)