141.The mole concept(4).

Before starting to solve problems on the mole concept, let us jot down a few important formulae –


Let us solve some problems based on these formulae.

1)Calculate mass of one molecule of carbon dioxide.(At. wt of C = 12 , O=16).



2) Calculate the number of molecules present in one drop of water having mass 0.6 × 10 -3 kg. (At wt of H = 1 , O= 16) ,


3) Calculate the weight of 0.4 mole of NaCl.


In the next post we will learn some new concepts useful in analytical calculations. Till then,

Be a perpetual student of life and keep learning….

Good day !

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