Chemical Reactions and Equations Quiz

Chemical reactions only involve the formation of new substances.

Chemical reactions do not involve any changes in energy.

Chemical reactions can only occur in a laboratory setting.

Chemical reactions involve the breaking and formation of chemical bonds. (correct)

To show the total number of atoms in a reaction.

To balance the mass and charge of reactants and products. (correct)

To describe the physical appearance of reactants and products.

To indicate the temperature at which the reaction occurs.

The total mass of substances always decreases.

The total mass of substances remains constant. (correct)

The total mass of substances depends on the temperature of the reaction.

The total mass of substances always increases.