cyanide compounds such as sodium cyanide, NaCN, are especially useful in gold refining because they will react with gold to form a stable compound that can then be separated and broken down to...

cyanide compounds such as sodium cyanide, NaCN, are especially useful in gold refining because they will react with gold to form a stable compound that can then be separated and broken down to retrieve the gold. Ore containing only small quantities of gold can be used in this form of "chemical mining." The equation for the reaction follows.

4Au + 8NaCN + 2H2O + O2 > 4NaAu(CN)2 + 4NaOH

Assuminga 79.6% yield in the conversion of gold to NaAu(CN)2, what mass of gold would produce 1.00 kg of NaAu(CN)2?