Stoichiometry

8. the mass in grams of one mole of a compound
9. a substance that has a fixed chemical composition
10. an atom or group of atoms that has an electric charge
14. the quantitative study of the reactants and products involved in a chemical reaction
15. a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms
16. tells you by mass what percent of each element is present in a compound

1. a number used to change one set of units to another by multiplying or dividing
2. the approximate number of nucleons in one gram of ordinary matter
3. the chemical formula of an ionic compound that lists the ions in the lowest ratio that equals a neutral electrical charge
4. a particle of matter that uniquely defines a chemical element
5. a compound in which water molecules are chemically bound to another compound or an element
6. contains the same number of each type of atoms on both the left and right sides of the reaction arrow
7. represents the number of each atom present in a given molecule
11. the relationship between the quantities of reactants and products before, during, and following chemical reactions
12. a standard scientific unit for measuring large quantities of very small entities
13. occur when chemical bonds between atoms are formed or broken