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Write the formula of the Sodium Sulphate compounds and calculate the molecular mass.

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Write the formula of the Sodium Sulphate compounds and calculate the molecular mass.

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Sodium Sulphate: Na2SO4
Molecular mass = (2 x atomic mass of Na + 1 x atomic mass of S + 4 x atomic mass of O)
= (2 × 23 + 1 × 32 + 4 × 16)
= (46 + 32 + 64) = 142 g/mol

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