Quantative Chemistry Flashcards
1
Q
Formula mass
A
Add up all the relative masses of the atoms in the compound
2
Q
% mass
A
Ar x number of atoms of that element divided by Mr of the compound then x 100
3
Q
What is a mole?
A
One mole of a substance is its gram formula mass
4
Q
Find the number of moles
A
- calculate Mr
- mass (g) divided by Mr
5
Q
Moles formula triangle
A
Mass
No.of moles x Mr
6
Q
Concentration formula
A
Mass of solute (g) divided volume of solvent (dm^3)
7
Q
Concentration triangle
A
Mass
Concentration x volume
8
Q
Limiting reactants
A
- the reaction stops when all of one of the reactants is used up.
- the reactant that’s used up is called the limiting reactant
