I fear that they, like so many organizations, must employ non-experts to interview experts and write stories. But getting the unit of concentration wrong? (Later in the sentence they do note that moles refer to quantity, not concentrations, so the whole sentence is self-contradictory.)
This problem is so common I think it might make sense to suggest a common solution. Perhaps an organization specializing in X ought to hire one member of the writing team who has a degree in X, to look over material before it goes out to the world. Or at least pay one of the experts on a per-case basis, say a day of salary for a half hour of work, to go over material before it is published.