What two things must occur in order for a light ray to refract when it strikes the boundary of a different medium?

How do forces between particles in gases compare to forces in the other states of matter? o a. the forces in gases are stronger than forces in solids but weaker than forces in liquids. o b. the forces in gases are weaker than forces in solids but stronger than forces in liquids. o c. the forces in gases are weaker than forces in solids and liquids. o d. the forces in gases are stronger than forces in solids and liquids. submit

An experimental procedure requires a 10 ml of acid to be dissolved

What is produced from neutralization of an acid and a base? a. hydronium ions b. citric acid c. salt and water