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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

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

When a scientific theory has been tested and proved by the scientific community, it becomes a law