Key terms Flashcards
Relative atomic mass
The average mass of one atom of an element relative to one twelfth of the mass of an atom of carbon-12
Relative molecular mass
The average mass of an molecule relative to one twelfth of the mass of an atom of carbon-12
Relative isotopic mass
The mass of an atom of an isotope relative to one twelfth of the mass of an atom of carbon-12
Avogadro constant
6.02 x10(23)
Molar mass
M g mol-1
What is a mole
The amount of any substance that contains the same number of particles as there are atoms in exactly 12g of carbon-12
Empirical formula
The simplest formula showing the simplest whole number ratio of the amount of elements present
Molecular formula
The actual number of atoms of each element present in a molecule
What is an acid?
Proton(H+) donor
What is a base?
Proton(H+) acceptor
What is Hess’s law?
The total enthalpy change for a reaction is independent of the route taken from the reactants to the products.
