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.
□ h₂o (l)
□ no (g)
□ so₂ (s)
□ co (g)
□ na₂o (s)

Explanation:

Step1: Recall kinetic - energy and state of matter

Kinetic energy is related to the motion of particles. Gaseous - state particles have higher kinetic energy compared to liquid and solid - state particles.

Step2: Identify the states of given molecules

$H_2O(l)$ is liquid, $NO(g)$ is gas, $SiO_2(s)$ is solid, $CO(g)$ is gas, $Na_2O(s)$ is solid.

Answer:

NO (g), CO (g)