We can see from the chemical formula of magnesium hydroxide that each mole contains 2 moles of OH ions. So the molar ratio of magnesium hydroxide to hydroxide ions becomes 1 : 2.
If there are 2.5 moles magnesium hydroxide present, the moles of hydroxide ions will be:
2.5 * 2 = 5 moles of hydroxide ions
Each mole of a substance contains 6.02 x 10²³ particles. Thus, the total number of ions will be:
5 x 6.02 x 10²³
= 3.01 x 10²⁴ hydroxide ions
The following of the macro molecular collide is all of the above
Conductor = Radiator , Frying pan , Ceramic baking dish
Insulator = Winter coat , Oven mitt and ice chest
PbCl2 is insoluble in cold water but soluble in hot water