Question

A signature written in carbon pencil weighs 1 2mg. Determine the number of carbon atoms present in the signature.

Answer 1

Answer:

given mass of carbon in sign=12*10^-3

molar mass of carbon is =12g

moles=12*10^-3/12

=10^-3

no.of particles=10^-3*6..022*10^23=6.022*10^20