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1) all chemical reactions are chemical changes. Is it a physical change or a chemical change? Knowing these fundamental molecular or ionic unit masses allows us to predict mass changes that occur on the macroscopic scale as a result of chemical reactions.

Web Exercises ( The Chemical Equation) From The Statement “Nitrogen And Hydrogen React To Produce Ammonia,” Identify The Reactants And The Products.

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When A Metal Reacts With An

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