The mass of the rock is 200 g. what is the density of the rock

It depends on the rock's shape and size. but if it only has a volume of 1 then it would be 200 g

Since density is mass/volume you would need the volume of the rock to answer.

Let's refer to the volume as v.

You would have to do:

200/v = the density of the rock

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both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .