Also Known As… The single most terrifying, horrific, scariest chemistry concept of the modern world. The Mole!. What is a “Mole”?. The term “ mole ” means a specific amount of a substance in chemistry. The amount that the mole is equal to is 6.02x10 23 .
The single most terrifying,
horrific, scariest chemistry
concept of the modern world.The Mole!
1 mole of C = 6.02x1023 atoms of C = 12.01g of C
1 mole of H2O = 6.02x1023 = 18.02g of H2O
(H2O = 1.01 + 1.01 + 16.00 = 18.02)
2H2O 2H2 + O2
÷ by 6.02x1023 particles/mol
# of particles # of moles
x by 6.02x1023 particles/mol
The “Massive” Return of the “Mole” People!!!Calculating Mass Using Moles
The molar mass of a substance is the mass (g) of one mole of the substance.
Basically, it is the mass (in grams) of 6.02x1023 particles of a substance.
Therefore, it would only make sense that the units for molar mass would be in grams/mole or g/mol.Molar Mass?
x by g/mol
# of moles (mol) mass (g)
÷ by g/mol
÷ by 6.02x1023 particles/mol x by g/mol
# of particles # of moles mass (g)
x by 6.02x1023 particles/mol ÷ by g/mol
Just make sure that your answers make sense and you have used the correct units in your answers.
Now…Get to work!Holy Mole-y!