If you are growing a culture of bacteria (150ml) in the incubator, (a) what size flask should you use, and (b) should you cap the tube tightly or keep the cap loose? why?

500 ml flask because it needs to be 4-5 times the volume

It is platinum in the market value

What is the question? if you were looking to design a method of separating something, you can separate this compound by putting both in water and allowing the water to dissolve the sugar. then pour it into another beaker and evaporate it then boom! salt and sugar : )