Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:a. a single monochloride productb. three isomeric monochloridesc. four isomeric monochlorides

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

Yes it would be a physical change.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .