Chapter 7 vocab

3. the amount of a chemical substance that contains as many elementary entities
4. a number placed in front of a chemical symbol or formula that shows how many atoms or molecules of the substance are involved in the reaction.
7. the mass of one mole of any substance
8. a chemical reaction that involves the release of energy in the form of heat or light.
10. a reaction in which one element is substituted for another element in a compound.
12. a reaction in which a compound breaks down into two or more simpler substances.
13. an article or substance that is manufactured or refined for sale.
14. energy stored in the bonds of atoms and molecules.
15. a type of reaction in which multiple reactants combine to form a single product

1. are reactions that involve the transfer of electrons from one species to another.
2. have two ionic compounds that are exchanging anions or cations
5. any chemical reaction that absorbs heat from its environment.
6. a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.
9. substance that takes part in and undergoes change during a reaction.
11. a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product.