PLEASE HELP, I WILL GIVE A BRAINLEIST!! What is the law conservation of mass? Explain the chemical equation CH4+2O 2 ---> C02+ 2H2O

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 .

The answer is bhope this

Answer:

5.6⋅10−^19  j

do you need the explaination?

Ijust took the quiz. their is no coefficient needed. : )