how many atoms would be present in a black dot marked on the paper with graphite pencil as a full stop at the end of a sentence.(given mass of a dot = 10-18g)

As we know that graphite is the allotrope of carbon. Therefore molar mass of graphite = 12 g mol-1
‚ÄčNumber of atoms of graphite = Given mass / Molar mass x 6.022 x 1023
                                              = 10-18 g/12 g x 6.022 x 1023
                                              = 5.0 x 104 atoms

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