The MOLE

The Mole

• Mole: the amount of a substance that contains as many particles as there are in exactly 12g of carbon-12

• A mole is similar to a dozen

Avogadro’s Number

• Avogadro’s number: the number of particles in exactly one mole of a pure substance

• Avogadro’s number = 6.022x1023

The Mole

• 1 mol = 6.022 x 1023 atoms

• Look it’s a conversion factor!

• Convert 2.56 mols of Ca to atoms

• Convert 5.63 x 1022 molecules of CuBr2 to mols

MOLAR MASS

Molar Mass

• Molar Mass: The mass of one mole of a substance

• Unit for molar mass is g/mol

• Molar mass is numerically equal to the average atomic mass in amu

Molar Mass

• Molar mass of lithium is 6.941 g/mol or 6.941 g 1 mol

• Molar mass is a conversion factor

• Convert 2.34 mol of Li to g

• Convert 150 g of Pb to mol

Molar Mass

• You can also find the molar mass for a molecular compound.

• Convert 54.2 g of silver nitrate to mols.

MOLE HIGHWAY

The Mole Highway

Mole

(mol)

Mass

(g)

Amount of a Substance

(atoms)

×𝑚𝑜𝑙𝑎𝑟𝑚𝑎𝑠𝑠

1𝑚𝑜𝑙

×1𝑚𝑜𝑙

𝑚𝑜𝑙𝑎𝑟𝑚𝑎𝑠𝑠

×1𝑚𝑜𝑙

6.022×1023𝑎𝑡𝑜𝑚𝑠

×6.022×1023𝑎𝑡𝑜𝑚𝑠

1𝑚𝑜𝑙

Using the Mole Highway

• Convert .0025 g of potassium to mol

• Convert 2.22 x 1021 atoms of copper to mol

• Convert 589 g of oxygen to molecules

• Convert 5.67 x 1025 molecules of zinc nitrate to grams

TRY IT!!!!

• Convert 859 g of Co to mol

• Convert 9.88 x 1022 atoms of K to mol

• Convert 52.67 mol of nickel (II) chloride to g

• Convert 12.3 g of potassium permanganate to molecules