Chemistry
(a) What are poly-atomic ions ? Give two examples.
(b) Name and state the fundamental law that every equation must fulfill.
Chemical Equation
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Answer
(a) Polyatomic ions are ions composed of two or more atoms that are covalently bonded together and carry a net electrical charge. Examples — Nitrate ion (NO3-) and Sulphate ion (SO42-).
(b) Every equation must fulfill the "Law of Conservation of Matter". It states that matter is neither created nor destroyed in the course of a chemical reaction. Thus, the total mass of the substances on either side of the equation must be the same.
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