Date

- P4 – Tuesday, February 6th
- P5 – Tuesday, February 6th
- P7 – Tuesday, February 6th

New Idea – Percent Composition (formula to mass)

- Assume 1 mole sample
- Moles –> Mass (each element)
- Total the mass
- Divide each mass by total

New Idea – Empirical Formula (mass to formula)

- Assume 100 gram sample
- percent to grams
- gram to moles
- divide by smoles
- multiply until whole
- <known molar mass>

Examples

- practice

Homework

- Ch. 3 (79, 83, 84)

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