Figure 2: Partial Copper (Cu)-Zinc (Zn) Phase Diagram y+ L 700 8+L L + + S P 598C 600 7 Temperature (C) 8 + 560C E E + L rte 500 80 90 60 70 Composition (wt% Zn) Questions 15-18: Use Figure 2 to determine the following for a Copper (Cu)-Zinc (Zn) alloy with an overall composition of 80 wt% Zn, at a temperature of 650C. 15. (Chapter 91 Approximate zinc concentration in the phase: E. 84% B. 16% C. 25% D. 75% A. 0% 16. (Chapter 9 Approximate zinc concentration in the liquid phase: A. 0% B. 16% C. 25% D. 75% E. 84% 17. (Chapter 9 Mass (weight) fraction of the 8 phase: A. 0% C. 50% D. 55.6% B. 44.4% E. 100%