Page 257 - Chemistry eBook

Math Concepts Review
Type of Problem
Key Words
What to Do
1. Gram Formula Mass
Grams/mass
Construct chart
2. Mole-mole
Mole, mole
Set up proportion
3. Mole calculation
Mole, mass (grams)
Reffy, Table T (p. 12) formula
4. Density problem
Density, mass, volume
Reffy, Table T (p. 12) formula
5. Percent composition problems
Percent composition (or percent mass)
Reffy, Table T (p. 12) formula
6. Empirical to molecular formula conversions
Empirical/molecular formula
Multiply/divide subscripts...
I bet you’re thinking, how do I know which formula to use for which example? Guess what? I’ll give you key words for each example that you’ll look for in the question. If you find these key words in the question, you’ll know to use that formula.
UNIT 6: MATH IN CHEMISTRY © 256