During the centuries following the collapse of the western Roman Empire, marble (calcium carbonate, CaCO3) was taken from the mon-
uments of Rome and heated to form quicklime (calcium oxide, Cao),
which was used to make plaster. Carbon dioxide, CO2, was also pro-
duced in this decomposition reaction. Write the balanced equation for
this reaction.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.