Reactions need to be balanced. Why is that? A. Reactions should be balanced because the reactants must be the same as the products.
B. Reactions should be balanced because atoms are not lost or gained in a chemical reaction.
C. Reactions should be balanced because the volume of reactants must equal the volume of products.
D. Reactions should be balanced because of the conservation of energy.

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.