Is helium is lightest monatomic element chemical properties

Which is a characteristic of mixtures?

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

Heat is the total potential energy of a substance that can be transferred. true false