What is the maximum possible concentration of Ni2+ ion in water at 25oC that is saturated with 0.070 M H2S and maintained at pH 3.0 with HCl? H2S(aq) ⇆ H+(aq) + HS-(aq) Ka1 = 1.0×10-7 HS-(aq) ⇆ H+(aq) + S2-(aq) Ka2 = 1.0×10-19 Ksp = [NiS] = 3×10-21

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The answer is 65.3312

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 .