Quick chemistry question?!?

Question

How many moles of ions are in one mole of Ca(OH)2 ?

How many moles of electrons in one mole of OH- ions?

From OCR Foundation Chemistry, Jan 07

Couls someone please tell me the answer and how they worked it out ?

Answer 1

Ca++ + 2OH-, so 3 moles of ions.

O has an octet, so 8 x 6 x 10^23 = 48 x 10^23 = 4.8 x 10^22 electrons