C3-Quantitative Chemistry

formula for percentage mass

Percentage mass of an element in a compound=

Ar x number of atoms of that element x100

Mr of the compound

The Avogadro constant

6\.02 x 10 power of 23

Relative atomic mass

= the amount of weight an atom is to have 6.02 x10 power of 23 number of atoms

Formula for moles

Number of moles = __mass in g (of an element or compound)__

Mr (of the element or compound)

Concentration of solutions

Concentration= __mass of solute__

mass of solvent