What will be the mass of one `""^(13)C` atoms in g?

Explanation

1 mole of `""^(12C` atoms`=6.022 xx 10^(23)` atoms =12g
`therefore 6.022 xx 10^(23)` atoms of `""^(12)C` have mass = 12g
1 atom of `""^(12)` will have mass `=12/(6.022 xx 10^(23))`
`=1.9927 xx 10^(-23)`g