The correct thing to say is "discuss" ,not "discuss about".. Or we might say "the discussion was about.....".
me
Type your answer here... There is no such thing as a pure substance. There is always some contamination. If the contaminant is less than an arbitrary platform of parts per million, PPM, (or billion,...
both
it is considered on four macronutrients fat, carbonhydrates, protien, and water.