Hermione granger is a diligent student. she wants to know what the empirical formula for c4h10 is. what is it

Empirical formula is the simplest ratio of whole numbers of components in a compound. While the molecular formula is the actual number of components making up the compound. 
the formula given C₄H₁₀
ratio of C to H is 4:10
if we simplify this ratio;
4:10
2:5
Then the empirical formula of the compound is  - C₂H₅

Iam not sure butch i thinnk it is ab

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 .