In modern integrated gasification combined cycle (igcc) coal-fed power plants, oxygen is produced via cryogenic separation of air and is fed to the igcc plant along with coal. the separation of oxygen from air is expensive, what reason(s) can you give for doing this?

Compare and contrast physical changes with chemical changes.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon