Question

Number of electrons in 0.2 mol. Sulphate ion?

Answer 1

Answer:  60.22 ×10²³  es

Explanation:  1 ion of  SO₄⁻²  contains es =16+4×8 +2   =50  es,

1 mole SO₄⁻²  contains =  6.022×10²³×  50  es

and 0.2 mole of it contains  = 6.022×10²³× 50 ×0.2 = 60.22  ×10²³  es