The Mole and Molar Mass

A counting number that equals 6.02 x 10²³ of ANYTHING.

Use the EE button. It takes the place of (x 10^) in your number. 6.02E23

When starting with MOLE you MULTIPLY

• Use 6.02 x 10²³ when dealing with an amount

• Use Molar Mass when Dealing with Grams
  

When starting with atoms/grams you divide

• Use 6.02 x 10²³ when dealing with an amount

• Use Molar Mass when Dealing with Grams
  

The average atomic mass on the periodic table tells the weighted average of all naturally occurring isotopes. (For an atom in amu.)

If you have a sample of the element with a mass of that value in GRAMS, you will have exactly one mole of atoms

10.81 grams of Boron contains 6.02 x 10²³ atoms of Boron.

If I have one mole of CO₂ molecules, there will be one mole of C atoms and 2 moles of O atoms. The mass of one mole of CO₂ molecules is (12.011 + 15.999*2) = 44.009 grams.

We can round to the 10ths place (44.0 g)

1 mole = 6.02 x 10²³ atoms (molecules, particles, chairs, skittles, etc.)

1 mole = molar mass in grams

• Molar mass comes from the Periodic Table and is different for each element or compound.