Công thức hoá học dạng chung của hợp chất gồm 2 nguyên tố hoae học được viết như thế nào A Ag2 B A C AxBy D AxByCz

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

Based on the equation and the information in the table, what is the enthalpy of the reaction?

What are the similarities of physical and chemical change ?