Question

What will be the mass of one carbon atom in gm?

Answer 1

I mole of carbon $=6.023\times {10}^{23}$ atoms

$6.023\times {10}^{23}$ atoms $=12g$ of carbon.

$1$ atom $=x$

$x=\frac{12}{6.023}\times {10}^{-23}\simeq 1.99\times {10}^{-23}\simeq 2\times {10}^{-23}$ gms.