amount of substance: definitions Flashcards
1
Q
amount of substance
A
the quantity whose unit is the mole
2
Q
anhydrous
A
containing no water of crystallisation
3
Q
mole
A
the amount of substance containing as many particles as there are carbon atoms in 12g of carbon-12
4
Q
avogadro constant
A
the number of particles in one mole of any substance (GIVEN: 6.02x10⁻²³ mol⁻¹)
5
Q
molar mass
A
the mass of one mole of substance
6
Q
molar gas volume
A
the volume occupied by one mole of gas at room temperature and pressure (GIVEN: 24.0 dm³mol⁻¹)
7
Q
stoichiometry
A
the relationships between the [amounts of substance and/or masses] of reactants and products before, during, and after chemical reactions
8
Q
atom economy
A
- a measure of the sustainability of a a reaction (with regards to cost and the environment)
- the percentage of atoms used in a reaction which have uses within the products
9
Q
percentage purity
A
actual mass÷impure mass
10
Q
percentage yield
A
- the molar conversion of reactants to products
- actual/experimental yield ÷ theoretical yield
11
Q
anhydrous/hydrated
A
contains [no] molecules of water of crystallisation
