Avoltaic cell is constructed from an ni2+(aq)−ni(s) half-cell and an ag+(aq)−ag(s) half-cell. the initial concentration of ni2+(aq) in the ni2+−ni half-cell is [ni2+]= 1.40×10−2 m . the initial cell voltage is +1.12 v .

The answer to this problem is. 67

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 .