By US standards, trucks can overload to 50 tons while flying to Vegas at 80 MPH. But I understand those chemicals were supposed to be in powder form, to be combined with binding resins and oxidizers later. So maybe one 40' semi may be expected to carry 20 tons. Divide 380/20= 19. And that stuff isn't ready to just blow up. You can't just throw a ciggie butt into it. And they don't have trucks like we do to travel decent roads in the desert. So maybe 10 ton/truck over shitty roads with big holes blown in them.
38 crappy Iraq-standard trucks might do it. Or the UN did it themselves.
My vote is on UN moving it, since they were involved in that other scandal. I really believe it was gone before we got there. THE UN LOST IT ON THEIR WATCH, so LOOK AT THEIR STOCKPILES...OH I forgot that is secret info only Kerry can help you with.