Unit 2 The Mole
Mole: a si (International) unit for measuring the amount of a substance
● A measurement of . . . STUFF
Molar Calculations
Avagadro’s Number
● 6.02 X 1023 particles (atoms/molecules) = 1 mole
● We use this number to calculate how many particles
of one element are equal to particles of another
element
○ Ex. 1 mol lead = 6.02 X 1023 atoms of lead
Finding the Molar Mass of Sodium Nitrate(NaNO3):
Element Atoms Mass Total Mass
Na 1 22.99 22.99
N 1 14.00 14.00
O 3 16.00 48.00
Total 84.99g
Mole: a si (International) unit for measuring the amount of a substance
● A measurement of . . . STUFF
Molar Calculations
Avagadro’s Number
● 6.02 X 1023 particles (atoms/molecules) = 1 mole
● We use this number to calculate how many particles
of one element are equal to particles of another
element
○ Ex. 1 mol lead = 6.02 X 1023 atoms of lead
Finding the Molar Mass of Sodium Nitrate(NaNO3):
Element Atoms Mass Total Mass
Na 1 22.99 22.99
N 1 14.00 14.00
O 3 16.00 48.00
Total 84.99g
