Time allowed for this examination, three hours. You may use any silent calculator. Use the back sides of pages for scratch paper. Nothing on the back side of a page will be graded. Write out the name, formula, or other item requested below.
Most molybdenum is used as an alloying element in steels.
Compute the free energy change that takes place in the reduction of MoO 3 by hydrogen gas under standard conditions. Then use this free energy change to calculate the value of the equilibrium constant for this reduction reaction under standard conditions. The plate thickness usually ranges from 0.025 to 0.25 mm. The surface area of the crown is 0.73 square metres. Compute the mass of gold necessary to do so.