Chem - Stoichiometry Flashcards
1
Q
How many units/particles in a mole?
A
6.022 x 10^(23)
This is Avogadros constant (NA)
2
Q
What is the relative atomic mass?
A
The weighted average of the relative isotopic masses in a sample containing a mixture of isotopes.
(average of relative masses of each isotope divided by total abundance)
3
Q
What is the relative formula mass?
A
The sum of relative atomic masses of the atoms that form a compound (Mr)
4
Q
How do you calculate the amount of a compound in moles?
A
Mass ÷ relative formula mass (1g mol^(-1)
5
Q
How do you calculate concentration of an aqueous solution?
A
concentration = amount ÷ volume
