1.3 Flashcards
1
Q
Define a mole
A
Amount of substance that contains the same number of particles as there are atoms in exactly 12 g of carbon-12
2
Q
Define relative atomic mass
A
the average mass of one atom of the element relative to one-twelfth the mass of one atom of carbon-12.
3
Q
Define relative isotopic mass
A
the mass of an atom of an isotope relative to one twelfth the mass of an atom of carbon-12.
4
Q
Define relative formula mass
A
the sum of the relative atomic masses of all atoms present in its formula.
5
Q
What is molar mass
A
Mass of one mole of a substance
6
Q
What is the Avogadro constant
A
Number of atoms per mole
7
Q
How to calculate n from mass
A
Mass/Mr
