Chemistry 4th 6 Weeks Test
| __ | 1. | atom | | A. | a unit of measure in chemistry equal to 6.02 x 1023 | | __ | 2. | Avogadro's number | | B. | mass of one mole of a compound. add together atomic masses | | __ | 3. | formula mass | | C. | 6.02x1023, equals one mole | | __ | 4. | formula unit | | D. | smallest unit of something, ex atom | | __ | 5. | mole | | E. | smallest particle of a covalent compound | | __ | 6. | molecule | | F. | smallest particle of an ionic compound | | __ | 7. | particle | | G. | smallest particle of matter |
| __ | 8. | balanced equation | | A. | what is formed during a reaction | | __ | 9. | Coefficients | | B. | equation with coefficients, shows conservation of mass | | __ | 10. | law of conservation of mass | | C. | smaller number written to the right and below an element | | __ | 11. | Products | | D. | the amount of matter remains constant during a reaction | | __ | 12. | Reactant | | E. | large number in front of a compound, tells how many | | __ | 13. | skeleton equation | | F. | substances at the beginning of a reaction | | __ | 14. | subscripts | | G. | an equation without coefficients, may not be balanced |
| __ | 15. | gas stoichiometry | | A. | ratio of number of moles between 2 compounds in an equation | | __ | 16. | limiting reagent | | B. | relationship between volumes of gases during an equation | | __ | 17. | mole ratio | | C. | relationship between amounts of substances in an equation | | __ | 18. | stoichiometry | | D. | reactant that runs out first, limits amount of product |
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