A breathing mixture used by deep sea divers contains helium oxygen and carbon dioxide. What is the partial pressure of oxygen if the total pressure of the gaseous mixture is 100.9kPa? The partial pressures for He and CO2 are 81.2 KPa and 0.5 KPa, respectfully.

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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 .