44given the equation representing a reaction at equilibrium : 2so2(g) + o2(g) ==> 2so3(g) + heat
which change causes the equilibrium to shift to the right?
(1) adding a catalyst
(2) adding more o2(g)
(3) decreasing the pressure
(4) increasing the temperature

(2) Adding more O2(g) would shift the equilibrium to the right because a higher concentration of oxygen is offered than its initial position, therefore more products have to be yielded to maintain equilibrium.

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 .