Unit #7CALCULATIONS BASED ON FORMULAE

7.3 - Calculation of molar mass

Calculate the molar mass of Na2CO3

Types of Atoms Number of atoms
( section 5.9.1 )
Atomic mass (g/mole) Mass of each type of atoms (g/mole)
Na
2
22.990
45.98
C
1
12.011
12.011
O
3
15.999
47.997
Molar Mass of Na2CO3
105.988 g/mole

NB: The mass of 1 formula unit of Na2CO3 is 105.988 amu.



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