[Unit 2.1] | Ar, Mr, Avogadro's Constant & The Mole Flashcards
1
Q
What is Relative Atomic Mass (Ar)?
A
The average mass of an atom of an element relative to 1/12th the mass of Carbon-12.
2
Q
What is the equation used to determine Ar?
A
((Abundance A * Mass A) + (Abundance B * Mass B)) / Total Abundance
3
Q
Define Relative Molecular Mass.
A
It is the mass of a simple molecule relative to 1/12th Carbon-12
4
Q
What compounds are described by the term relative formula mass?
A
Ionic compounds as they do not exist as molecules.
5
Q
What is Avogadro’s constant equivalent to? (Definition + Value)
A
• The number of atoms in 12g of C-12.
• 6.022*10^23
6
Q
What equation links n, m and Mr?
A
n = m/Mr
