Question: A 1.42-g sample of a pure compound with formula M 2 SO 4 was dissolved in water and treated with an excess of aqueous calcium

A 1.42-g sample of a pure compound with formula M₂SO₄ was dissolved in water and treated with an excess of aqueous calcium chloride, resulting in the precipitation of all the sulfate ions as calcium sulfate. The precipitate was collected, dried, and found to weigh 1.36 g. Determine the atomic mass of M and identify M.

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