Ether, $(C_2{H}_5{)}_{2}O,$ which was originally used as an anesthetic but has been replaced by safer and more effective medications, is prepared by the reaction of ethanol with sulfuric acid.

$2C_2{H}_{5}OH+H_{2}S{O}_4(C_2{H}_5{)}_{2}O+H_{2}S{O}_4+H_{2}O$

If $17\mathrm{.}2g{C}_2{H}_{5}OH$ reacts with excess $H_{2}S{O}_4,$ what is the theoretical yield of $(C_2{H}_5{)}_{2}O?$

$g(C_2{H}_5{)}_{2}O$

If this reaction actually produces $9\mathrm{.}56g(C_2{H}_5{)}_{2}O,$ what is the percent yield of $(C_2{H}_5{)}_{2}O?$

$\%$