For producing 1kg of gold from an ore having assay of 2ppm au,____ ×10(to the power 3)kg of ore needs to be processed.

Ans= 500, Please see the solution; 2 ppm = 2mg/Kg. To produce 1kg of gold the amount of ore required is 1kg/(2mg/kg) = (10^6/2) kg = (5 x 10^5) kg = 500 x 10^3 Kg

1.Assay value is the ore content in the whole mining body ( ore+gangue) 2.Here 2ppm means 2 part in 10^6 part. Or 10^6 part of whole Rock contains 2 part. it's a ratio so i ca...