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Question
Calculate the relative molecular mass of Ammonium sulphate.
(use K = 39, Cl = 35.5, O = 16, C = 12, H = 1, Na = 23, N = 14, S= 32)
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Solution
The relative molecular mass of Ammonium sulphate (NH4)2SO4 is :
[atomic mass of 2 N atom + Atomic mass of 8 H atom + atomic mass of 1 S + atomic mass of 4 O atom]
14 x 2 + 8 x 1 + 32 + 16 x 4 = 132.
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