Question 1) True or false. The thermocline is the depth at which there is the greatest temperature gradient.
Question 2) What does this equation represent? Select the TWO correct answers
2CuS (s) + 4H+ (aq) + O2 (g) = 2Cu2+ (aq) + 2S + 2H2O
A. Oxidation of copper by oxygen
B. Leaching (solubilisation) of copper in an acidic solution
C. Reduction of copper in a copper sulfide by oxygen
D. Oxidation of sulfur in the mineral copper sulfide by oxygen
E. Reduction of sulfur by oxygen