Achange in means that a chemical has occurred?
a) the energy and mass.

b) the kinds of atoms involved .

c) the properties and identity. of the reacting substances.

d) the energy and kinds of atoms of the reacting substances.

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

When balancing a chemical equation:

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa