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10 January, 05:26

Classify each of the following substances as an element or a compound: (a) hydrogen, (b) water, (c) gold, (d) sugar.

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  1. 10 January, 05:36
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    a) element

    b) compound

    c) element

    d) compound

    Explanation:

    a) Hydrogen is the chemical element with the symbol H; is the lightest element in the periodic table.

    b) Water: It is a substance whose molecule is composed of two atoms of hydrogen and one of oxygen.

    ⇒ molecular formula: H2O

    c) gold: is the chemical element with the symbol Au. It is a very dense, soft and intense yellow metal.

    d) sugar: it is a compound whose chemical formula is C12H22O11
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