How would you classify each of the following as element, compound, or mixture?

(a) Platinum is a precious metal, which is an element……..

(b) Table salt is a binary chemical compound, i.e. ##NaCl##.
(c) Soy sauce is a solution that contains salt and flavourings, and is thus a mixture.
(d) Sugar is a pure chemical compound.

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Approximately 250 words