Yes. I wanted to make sure that it was a typo that the teacher madeBut yes, there seems to be an error in the mass in part d. I'm assuming that's what you were talking about.
Of course it's well written it was copied from an olevel paper. The teacher just changed the substance and masses.I’m a bit surprised that the percent in part (e) they’d be interested in is a mass percent. If you convert the masses to moles, you find that there are 5 waters per CuSO4 molar unit, which is actually the case for hydrated copper sulfate. It’s a well-written question if you get rid of the mistakes.