amount of substance Flashcards
Amount of substance
The quantity that has molecules as its units, used as a way of counting atoms. The amount of substance can be calculated using mass (m= CV).
Anhydrous
A crystalline compound containing no water.
Atom economy
A measure of the amount of starting materials that end up as useful products. A high atom economy means a process is more sustainable as there is less waste produced.
Percentage atom economy.
(molecular mass of desired product/ sum of molecular masses of all reactants) x 100
Avogadro Constant (NA)
The number of particles per mole of substance (6.02 x 10^23 mol^-1).
Composition by mass
The relative mass of each element in a compound.
Empirical formula
The simplest whole number ratio of atoms of each element present in a compound.
Hydrated
A crystalline compound that contains water.
Ideal gas
A gas which has molecules that occupy negligible space with no interactions between them.
Ideal gas equations.
pV = nRT
Molar Gas Volume
The volume of 1 mole of gas (dm^3 mol^-1).
Molar Mass
Mass per mole of a substance(g mol^-1)
Mole (mol)
The amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12 isotope.
Molecular formula
The number and type of atoms of each element in a molecule.
Percentage yield
The percentage ratio of the actual yield of product of an element or compound compared to 1/12th the mass of an atom of carbon-12.
