The salt dissolved faster in the warm water, because the water molecules have more kinetic energy to dislodge the salt particles from the surface of the crystal.
The colder the water, the less kinetic energy the water molecules will have, and the more slowly the salt will dissolve.
CO is not an element because CO is a Compound. Elements contain One capital and one lowercase letter. While Compounds contain two or more capital letters.
Do you think that the mole should be considered a base unit in the SI system?
The mole is not a base unit on a par with the six property base units; it cannot be used in significant physical–chemical comparisons until the subscript parameter p in mole-of-Ep has been given a certain “value”."
