The one of the most useful method of recycling scrap aluminum changes some of it to common alum [potassium aluminum sulfate dodecahydrate, KAI(SO4)2.12H2O], an important food preservative and dye festive.
1. Determine the numbers of moles of potassium ions are in 429 g alum?
2. Determine the number of mass % S in alum?
3. Determine the maximum amount of alum (in metric tons) that can be prepared from 17.1 metric tons of scrap aluminum (1 metric ton = 1000 kg)?