7.1 The Mole

7.1 The Mole

• You buy eggs by the dozen at the grocery store.

• Collections of items include a dozen, gross, ream, and mole.

• Amedeo Avogadro was an Italian physicist.

• Avogadro's number of atoms is always contained in one mole of an element.

• A mole of a compound has Avogadro's number of molecules.

• One mole of CO2 contains 1023 molecules of CO2.

• 6.02 formula units of NaCl are contained in one mole.

• Avogadro's number is used as a conversion factor to convert between the moles of a substance and the number of particles it contains.

• 6.02 * 1023 particles 1 mole and 1 mole 6.02 * 1023 particles can be used to convert moles of sulfur to atoms of sulfur.

• Avogadro's number is used to convert the number of atoms of S 1 mole to the number of moles of CO2.

• The number of moles will be a small number compared to the number of atoms or molecule, which will be large as shown in Sample Problem 7.1.

• The given and needed quantities should be stated.

• There is a plan to convert moles to atoms.

• Avogadro's number is used to write conversion factors.

• The number of particles can be calculated by setting up the problem.

• The number of atoms in a compound is indicated by the subscripts in the chemical formula.

• The chemical formula of aspirin has 9 carbon atoms, 8 hydrogen atoms, and Why does 1 mole of Zn(C2H3O2)2, 4 oxygen atoms in it.

• The given and needed quantities should be stated.

• A plan to convert moles of a compound to moles of an element is needed.

• Use subscripts to write the equalities and conversion factors.

• To calculate the moles of an element, set up the problem.

• Oxepine is a ring oxacycle.

• Some antiperspirants use aluminum sulfate.