General Chemistry 1 - Week 5

Stoichiometry

quantitative nature of chemical formulas and chemical reactions

Mole

standard unit in chemistry for measuring large quantities of very small entities such as atoms, molecules, or other specified particles

Mass

is a property that reflects the quantity of matter within a sample. It is usually expressed in grams

Mole Ratio

is a conversion factor that relates the amounts in moles of any two substances in a chemical reaction.

Molar mass (MM)

is expressed in grams/mole or g/mol because we are pertaining to the mass of compound per 1 mol.

Percent Yield

is the ratio of the actual yield to the theoretical yield, expressed as a percentage.

The Avogadro's number (NA)

is a constant used to quantify the number of particles of an element (atoms, ions) or compound (molecules, formula unit)
Named after the italian scientist, Amadeo Avogadro

Mole to Mass

maass = number of moles x molar mass / 1 mol

Mass to Mole

Mole = mass of substance x 1 mol / molar mass

Mass to Mass

Mass A x 1 mole A / molar mass A x no. of moles b (mole ratio from chemical equation) / no. of moles A x molar mass b / 1 mole b

Percent Yield

% = actual yield (in grams) / theoretical field (in grams) x 100