One method of producing hydrogen peroxide is to add strontium peroxide to water. A precipitate of strontium oxide forms, which may then be filtered off to leave a solution of hydrogen peroxide. Write the word equation, symbolic equation and balance the equation.

Engineers have contribute to society in many ways like making the technology we use today or any type of power energy material

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 .