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Counter-Strike: Source (2004)

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\( W_{1} \) g of an element combines with oxygen forming \( W_{2} \mathrm{~g} \) of its oxide. The equivalent mass of the element is:
(A) \( \left[W_{1} / W_{2}\right] \times 8 \)
(B) \( \left[\frac{W_{1}}{W_{2}-W_{1}}\right] \times 8 \)
(C) \( \left[\frac{W_{2}-W_{1}}{W_{1}}\right] \times 8 \)
(D) (d) \( \left[\frac{W_{1}}{W_{1}-W_{2}}\right] \)
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