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Compounds

Question 9 Tw...

Question

Question 9
Two chemical species X and Y combine together to form a product P which contains both X and Y,
$X + Y \to P$ , X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition

(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (iii) and (iv)

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Solution

The answer is (d).
In this reaction, X and Y cannot be broken down into simpler substances by chemical reactions,
therefore, X and Y are elements. A compound is a substance made up of two or more elements chemically combined in a fixed proportion by mass, therefore, P is a compound, having a fixed composition.

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Q. Question 2
Find p(0), p(1) and p(2) for each of the following polynomials:
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