Atoms, Molecules & Stoichiometry Flashcards
1
Q
Define relative atomic mass, Ar
A
Weighted average mass of all the isotopes compared to 1/12th of the mass of C-12
2
Q
Define isotopic mass, Ar
A
The mass of a particular isotope compared to 1/12th of the mass of C-12
3
Q
Define relative molecular mass, Mr
A
The weighted average mass of the molecule of a molecular compound compared to 1/12th of the mass of C-12
4
Q
Define formula mass, Mr
A
The weighted average mass of a formula unit of an ionic compound
5
Q
Define unified atomic mass
A
It is the mass of 1/12th of C-12 atom
6
Q
Define mole
A
The amount of substance containing 6.02 × 10²³ particles of that substance.
The amount of substances containing as many particles as there are atoms in 12g of C-12
7
Q
Define molar mass
A
The mass of 1 mol of any substance
