1. How many grams of nickel must be added to 500 grams of copper to produce an alloy that has a liquidus temperature of 1350°C? What is the ratio of the number of nickel atoms to copper atoms in this alloy?
2. How many grams of nickel must be added to 500 grams of copper to produce an alloy that contains 50 wt% a at 1300°C?