Question: Figure 2: Partial Copper (Cu)-Zinc (Zn) Phase Diagram y + L 700 8 + L L > + S P 598C Temperature (C) 600 S+

Figure 2: Partial Copper (Cu)-Zinc (Zn) Phase Diagram y + L 700 8 + L L > + S P 598C Temperature (C) 600 S+ 560C E + L E yte 500 80 90 70 60 Composition (wt% Zn) Claestions 18-20: Use Figure 2 to determine the following for a Copper (Cu)-Zinc (Zn) alloy with m overall composition of 85 wt% Zn, that is cooled from a temperature of 700C. 18. (Chapter 9 At what temperature (C) will the first solid form? A. 700 B. 598 C. 695 D. 640 E. 750 19.[Chapter 9 What is the first solid phase to form? AL B.Y C. D. Zinc E.8 20. Chapter 9 What is the zinc concentration in this solid phase when it first forms? A. 68% B. 74% C. 80% D. 81% E. 100%

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