The element X is trivalent. 9.0 g of the element combines with 8.0 g of oxygen. The atomic weight of X is, therefore :
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The element X is trivalent. 9.0 g of the element combines with 8.0 g of oxygen. The atomic weight of X is, therefore :

The element X is trivalent. 9.0 g of the element combines with 8.0 g of oxygen. The atomic weight of X is, therefore :
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The element $X$ is trivalent. $9 \cdot 0 g$ of the element combines with $8.0 g$ of oxygen. The atomic weight of $X$ is, therefore :

(A) 3

(B) 9

(C) 18

(D) 27

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ANSWER : Here, The atomic weight of $X$ is, therefore : $27$. So, The correct answer of this question will be option (D).

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