Answer:
(a) (i)
Barium chloride
= 137 + (35.5
x 2) = 208 u
(ii) Barium
sulphate
= 137 + 32 +(16
x 4) = 233u
(iii) Sodium
sulphate (Na2S04)
=(23x2)+32+(16x4)
=233u
(iv) Sodium
chloride (NaCI) =(23+35.5)= 58.5 u
(b) Vansh showed the
scientific value to complete the activity.
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