Which of the following is the best description of a chemical reaction? a. when molecules of a substance move slowly enough, they link together to form a crystalline structure. b. when two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances. c. when two molecules collide with enough force, they shatter into individual atoms. later, these atoms join up in new combinations to form new substances. d. when two atoms collide with enough force, their nuclei fuse together, forming new substances and releasing tremendous amounts of energy.

Option (B) is the correct answer.

Explanation:

A chemical reaction is defined as the reaction in which two or more molecules collide together that results into breakage of old bonds and formation of new bonds due to which there occurs formation of new compounds.

For example,

Basically, a chemical reaction changes the identity of reactant species.

Thus, we can conclude that the statement when two molecules collide with enough force, old chemical bonds are broken and new bonds form, resulting in one or more new substances, is the best description of a chemical reaction.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

the answer would be b i believe