Which compound has highest molecular weight : dye, methylene blue, malachite green, potassium?

How many grams of aluminum will there be in 98g of al2o3?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.