Arya drops a small sample of brown iodine into a beaker of water.

arya can conclude that the iodine has dissolved in the water if she observes which of the following?
a.
the iodine spreads evenly throughout the water.

b.
all of the iodine floats at the surface of the water.

c.
the iodine sinks to the bottom of the beaker and does not move.

d.
the water boils and leaves the iodine behind.

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.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.