Stoichiometry Quick Notes

Mole-Mass Multiplying the number of moles of a

substance by its molar mass give the mass of the substance.

Dividing the mass of a substance by its molar mass give the number of moles of that substance.

Mole- Molecule Multiplying the number of moles of a

substance by Avogadro’s number gives the molecules of the substance.

Dividing the molecules of a substance by Avogadro’s number give the number of moles of that substance.

Mole-Volume One mole of any gas at STP (1atm

pressure and 0 degrees C) occupies a volume of 22.4L.

The density f any gas at STP is its molar mass divided by 22.4L

The same procedure goes: from moles you multiply to moles you divide