A $100-$mL sample containing chloride ion is titrated with AgNO$3$ in a precipitation reaction. Calculate the concentration of chloride ion in mg$/$L if $10$ mL of $0\mathrm{.}01$ N AgNO$3$ is required to reach the equivalence point. $($Ag: $108,$ N:$14,$ O:$16,$ Cl: $35\mathrm{.}5)$