Sulfur and oxygen atoms are present in sulfur trioxide, so3. to make 10^20 molecules of so3, how many atoms of s and how many of o are needed?

The correct answer would be 1. precipitation

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 just took the test