2.5 many moles of scmium atoms are in 53x10 tons of scantium

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

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.