Take a paperclip into water and then slowly pull it upward to the point where it is nearly free from the surface. You'll find that for a short distance the water is brought up with the metal are these adhesive or cohesive forces at work?

Adhesive forces and cohesive forces

Explanation:

Cohesive forces is how much the water molecules stick to each other and adhesive forces are to which extinct they stick to other surfaces.

When we pull the paperclip upward the water molecules adhere to it due to adhesive forces. While the water on the clip is remain connected to water in the glass because of cohesive forces.

So if the adhesive forces dominates the water will be pulled out and if the cohesive forces dominate it will remain with other water in the cup.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)