If four moles of So2 are oxidised to SO3, how many moles of oxygen molecules are required
(a) 0.5 (b) 1.0 (C) 1.5
(d) 2.0

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.