3) If an amount of a chemical remains after reacting in a chemical reaction, it is known as
the
a. Coefficient
b. Excess Reactant
C. Limiting Reactant
d. Actua! Yieid

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 .

Compound with sulfer  is bright red 

The answer is bhope this