¿How many particles of NaCO3 are present in 3 moles of NaCO3?

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 .

It would be true sodium reacts with water in a violent way 

"electrical energy" transforms to "thermal energy".hope my answer has you : )