ASAP what’s the limiting reagent of 700g of Al(s) (aluminum) and 3000g of HCl(aq)(hydrochloric acid)

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 .

Ch3cooh i think this is the answer