quantitative chemistry

• concentration is a measure of how crowded things are
• the more solute (substance that is dissolved) there is in a given volume, the more concentrated the solution
• the amount of a substance in a certain volume of a solution is called its concentration
• concentration = mass / volume
• percentage mass of an element in a compound = (Ar x number of atoms of that element / Mr of the compound) x 100
• number of moles = mass / Mr