A. Draw the Lewis structure for ethene (ethylene), H2CCH2, a small hydrocarbon with a C=C double bond.
b. Based on this structure, predict the H–C–H bond
angle. Explain your reasoning.
c. Sketch the molecule showing the predicted bond
angles

You know how the first one if filled up like the objects do the same but with the other categories

D.na is the answer hope this

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 .