Star a and star b are the same distance away from earth from earth star star a seems brighter than star b which star has the highest apparent magnitude

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.

it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

hope this : )