on desire preparer une solution de sulfate de cuivre de concentration 20 g/l si on pese 1g de sulfate de suivre solide il faudra les in troduire dans une fiole jaugee de ?

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 .

Aquantity of that isotope to decay to 1/2 of  its original value