4. Stoichiometry Flashcards
1
Q
Define molecular formula and empirical formula
A
the number and type of different atoms in one molecule.
the simplest whole number ratio of the different atoms or ions in a compound
2
Q
Define mole
A
mole, mol, is the unit of amount of
substance and one mole contains 6.02 × 10^23 particles, e.g. atoms, ions, molecules; this number is the Avogadro constant
3
Q
moles formula
A
moles= mass/ molar mass
moles= volume*concentration
moles= volume/24
4
Q
percentage yield, percentage composition and percentage purity
A
PY- actual yield/ theoretical yield * 100
PC- Ar/ Mr * 100
PP- mass of pure product/ mass of impure product * 100
5
Q
Conversions and units
A
mol/dm^3 to g/dm^3- *Mr
1 dm^3= 1000 cm^3
