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25 January, 21:57

A teacher wants to preform a class room demonstration that illustrates both chemical and physical changes. which would be the best demonstration she could use

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  1. 25 January, 22:39
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    D) burning a candle

    Explanation

    When burning a candle no new substance is form.

    We have both physical and chemical change occuring.

    Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.

    Chemical part: burning of the wax vapour forms the chemical change.
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