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Chapter 23 Chemical Reactions

Chemical Reaction. Changes one or more substances into new substancesReactants are substances that combine or changeNew substances that are produced are called Products. Conservation of Mass. Law that states, in a chemical reaction, matter is not created or destroyed but stays the sameAntoine Lav

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Chapter 23 Chemical Reactions

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    1. Chapter 23 – Chemical Reactions 23.1 Chemical Changes

    2. Chemical Reaction Changes one or more substances into new substances Reactants are substances that combine or change New substances that are produced are called Products

    3. Conservation of Mass Law that states, in a chemical reaction, matter is not created or destroyed but stays the same Antoine Lavoisier experimented with mercury (II) oxide and heat He found mass of products (liquid mercury and oxygen gas) equaled mass of reactants

    4. Chemical Equation Uses chemical formulas and symbols to describe a chemical reaction and the product(s) it produces Chemical formula expresses the relationship between elements in the compound and molecules they make up

    5. Coefficients Numbers which represent the number of units of each substance in a reaction Knowing coefficients of chemical reactions allows chemists to use the correct amount of reactants to predict the amount of products

    6. Subscripts Numbers which represent the number of atoms in a molecule of a particular element Symbols used to show state of reactants (s) solids (aq) aqueous (l) liquid (g) gas

    7. In-Class Assignment/Homework 23.1 WKT Balancing Equations Challenge WKT, parts A & B

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