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20 June, 22:13

Which substance can be decomposed by chemical means?

(1) ammonia (3) phosphorus

(2) oxygen (4) silicon

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Answers (1)
  1. 21 June, 00:17
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    The answer is (1) ammonia. Ammonia is the only compound in the list, and compounds can be separated via chemical reactions. In order to decompose an element, however, you would need a nuclear reaction, which is different from an ordinary chemical reaction.
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