3) STOICHIOMETRY Flashcards
What is the molecular formula of a compound
It is the number and type of different atoms in one molecule.
What is the relative atomic mass
The average mass of the isotopes of an element compared to 1/12 the mass of a carbon - 12 atom.
What is the formula for relative atomic mass
(mass number times percentage abundance) / 100
What is relative molecular mass
The measure of the mass of a molecule relative to the mass of carbon -12
What is a mole
The amount of a substance that contains exactly the Avogadro number of ‘elementary entities’ of a given substance.
What is the formula for relative molecular mass
(number of atoms times relative atomic mass)
What is the formula for amount of substance [mol]
mass/ molar mass
Formula for number of particles
mol times Avogadro’s constant
