Hydrogen peroxide is a liquid people mix with water and use to disinfect skin wounds. Under certain conditions, the hydrogen peroxide molecule will break down and form water and oxygen. Look at the diagram showing before and after the molecule breaks down. What evidence supports that mass is conserved during this chemical reaction? Choose two that apply.

Yes i think so not 100 percent sure though

The mass has escaped into a gas which you can not see so the law stays true.

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 .