Calculate the molecular mass of sulphuric acid.

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Solution

Atomic masses of H = 1u, S = 32u, O = 16u.
The molecular formula of sulphuric acid is H₂SO₄.
The molecular mass of sulphuric acid is calculated as,
= (2 x atomic mass of H) + (atomic mass of S) + (4 x atomic mass of O)
= (2 x 1) + (32) + (4 x 16) = 2 + 32 + 64
= 98u
Therefore, the molecular mass of sulphuric acid is 98u.

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