Question

for a sample of 0,2 moles of magnesium bromide (MgBr2) calculate :
a) the number of moles of Mg^2+ ions
b) the number of moles of Br^- ions

Answer 1

Explanation:

the no of mole of mg ion are 0.066

the no of moles of br ion are

0.13

Answer 2

Hi, please consider the answer given below

In the detrmination of the number of bromide ions in 0.2 mole of MgBr2

We use the avogadros number 6.02 x 10^23

Number of molecules of bromide ions= No. of moles x Avogadros number

Number of molecules of bromide ions= 0.2 x (6.02 x 10^23)

= this gives 1.2 x 10^23 bromide ions