Enriched Chemistry
Study Guideline – Unit IV
The Mole (Chapter 10 in your Text book)
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1. State the number of particles in a mole and how it relates to Avogadro’s number.
2. Define the term mole and describe how it is used in chemistry.
3. Explain and Calculate molar mass when given the name or the formula for an element or
a compound.
4. Convert between the number of moles, the number of particles (atoms, molecules or
formula units), the mass of the sample, and the number of liters in a gas at STP.
5. Define STP as 1 atm of pressure and 273°K.
6. Calculate the percentage composition by mass.
7. Differentiate between empirical and molecular formulas.
8. Determine the empirical and molecular formulas of compounds.
9. Conversion factors
1 mol = 6.02 x 1023 representative particles (atoms, molecules, formula units, ions.) = Atomic/molecular
mass of an element/compound in g = 22.4 L of gas at STP