1. Law of constant proportion : According to this law, a chemical compound always consists of the same elements in the same proportion by mass.

    Law of constant proportion : According to this law, a chemical compound always consists of the same elements in the same proportion by mass.

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  2. Barium Chloride — BaCl₂ Sodium Sulphate —Na₂SO₄

    Barium Chloride — BaCl₂
    Sodium Sulphate —Na₂SO₄

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