Question

A signature written in carbon pencil weighs 1mg. Calculate the number of carbon atoms present in that signature​

Answer 1

Answer:

0.502×10^20

Explanation:

1 mg=1×10  −3 g

The number of carbon atoms present in the signature =  12 g/mol

1×10  − 3 g  × 6.023×10  23  atoms/mol=0.502×10  20  atoms.

Hope it helps you.

Answer 2

Explanation:

Now the molar mass of carbon is 12gmol−1 . So we can say that 12g of carbon contains Avogadro's number of particles. Where n is the number of carbon atoms. So the answer of the above equation comes out to be 0.502×1020 .