What is the balanced equation for the following equilibrium expression?
a. 6SO2(g) + 3O2(g) 6SO3(g)
b. 6SO3(g) 6SO2(g) + 3O2(g)
c. 6SO3(aq) 6SO2(aq) + 3O2(aq)
d. 6SO2(aq) + 3O2(aq) 6SO3(aq)
e. SO2(g) + O2(g) SO3(g)
Answer: a. 6SO2(g) + 3O2(g) 6SO3(g)