Related questions

Question

Gold is isolated from rocks by reaction with aqueous cyanide, CN-: 4Au (s) + 8NaCN (aq) + O2 (g) + H20 ---------> 4Na[Au(CN)2] (aq) + 4NaOH (aq). How many liters of a 0.200 M sodium cyanide solution would be needed to react with 40.0 kg of rocks that contain 2.00% by mass of gold?