Question

A signature written with carbon pencil weight 0.86 MG find the number of mole of carbon atoms present in the signature​

Answer 1

Explanation:

weight= 0.86mg=0.86×10^-3

molar mass of carbon =12

therefore

number of mole=mass/molar mass

=0.86×10^-3/12

=0.071×10^-3