Mole Concepts (3)

Numbers of particles in 1 mol of ionic substance

1 mol of an ionic substance contains 6.02 × 1023 formula units

The background to the naming of Avogadro's Constant

The Avogadro constant is named after a famous Italian scientist, Amedeo Avogadro

Way to get the number of moles

The mass of a substance must be measured and we also need to know its molar mass

The value of molar mass of a substance

Is the same as its relative mass

The molar mass of carbon, C if the relative atomic mass of carbon, C is 12

The molar mass of carbon, C is 12 g mol–1

The molar mass of copper, Cu if the relative atomic mass of copper is 64

The molar mass of copper, Cu is 64 g mol–1

The molar mass of water that consists of H2O molecules if the relative atomic mass of water is 18

The molar mass of water is 18 g mol–1

The molar mass of sodium chloride that consists of NaCl units if the relative atomic mass of sodium chloride is 58.5

The molar mass of sodium chloride is = 58.5 g mol–1

The molar mass of oxygen, O if the relative atomic mass of oxygen is 16 g mol–1

The molar mass of oxygen is

The molar mass of bromine, Br if the relative atomic mass of bromine is 80

The molar mass of bromine is 80 g mol–1