your data:Your first unknown sample weighed $1\mathrm{.}0389$ grams.

The burette starting volume was $2\mathrm{.}32mLs$

The burette reading at the titration end point was $18\mathrm{.}51mLs.$

Calculate your unknown concentration in units of wt$\%.$

Your second unknown sample weighed $1\mathrm{.}0214$ grams.

The burette starting volume was $1\mathrm{.}83mLs$

The burette reading at the titration end point was $17\mathrm{.}73mLs.$

Calculate your unknown concentration in units of wt$\%.$

Your third unknown sample weighed $1\mathrm{.}0312$ grams.

The burette starting volume was $2\mathrm{.}66mLs$

The burette reading at the titration end point was $18\mathrm{.}58mLs.$

Calculate your unknown concentration in units of wt$\%.$

Calculate and report the average Fe wt$\%$ in your unknown sample.te concentration.