If the percent by mass is 4.0% and the mass of the solution is 200 g, what is the mass of solute in solution?

8 grams.

Explanation:

When solving this type of problem, you need to find how many grams 4.0% of 200g will be equivalent to. You can do this by setting up an equation as such:

200 grams ×0.04 = 8 grams. (0.04 is equivalent to 4%)

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.