A chemical reaction is at equilibrium when:.a. the reaction occurs quickly. b. there is no reverse reaction possible, only a forward reaction. c. there are equal amounts of products and reactants. d. the rate of the forward reaction equals the rate of the reverse reaction.

D.

Explanation: A chemical reaction is said to be in a state of equilibrium when the rate of the forward reaction equals the rate of the backward reaction, thus, there is no net change in the concentration of reactants and products.

mark him as !

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.