STUDY GUIDE
MATCH THE TERM WITH THE CORRECT DESCRIPTION
A. molecular mass E. formula mass
B. Avogadro constant F. molar mass
C. molarity G. percentage composition
D. empirical formula H. molecular formula
1. the sum of the atomic masses of all atoms in the formula unit of an ionic compound _____
2. the simplest ratioof the elements in a compound _______
3. the sum of all the atomic masses in a molecule _____
4. the masses of 6.02 x 10^23 molecules, atoms, ions, or formula units of a species _____
5. the ratio between the moles of dissolved substance and the volume of solution in cubic decimeters _____
6. shows the actual number of atoms in a molecule _____
7. 6.02 x 10^23 _____
8. a statement of the relative mass of each element contributes to the mass of a compound as a whole _____
FIND THE FORMAULA MASS OR MOLECULAR MASS OF THE FOLLOWING COMPOUNDS.
9.AMMONIA (NH3)
10.METHANE (CH4)
11.SODIUM HYDROGEN CARBONATE (BAKING SODA), NaHCO3
DETERMINE HOW MANY MOLES ARE REPRESENTED BY 25.0 g OF EACH OF THE COMPOUNDS LISTED IN QUESTIONS 12-14.
12. AMMONIA, NH3
13. METHANE, NH3
14. SODIUM HYDROGEN CARBONATE (BAKING SODA), NaHCO3
DETERMINE THE MASS, IN GRAMS, OF 2.50 x 10^24 MOLECULES OR FORMULA UNITS OF EACH OF THE COMPOUNDS IN QUESTIONS15-17.
15. AMMONIA, NH3
16. METHANE, CH4
17. SODIUM HYDROGEN CARBONATE, NaHCO3