Incorrect.

Calculate the number of vacancies per cubic meter in some metal at $760C.$ The energy for vacancy formation is $0\mathrm{.}75e$v$/$atom$,$ while the density and atomic weight for this metal are $5\mathrm{.}49\frac{g}{c}{m}^3($at $760C)$ and $97\mathrm{.}31\frac{g}{m}ol,$ respectively.

answer in $m^{-3}($use e$)$