W1 g of an element combines with oxygen forming W2 g of its oxide. The equivalent mass of the element is:

(a) [W1 / W2]x8

(b) [W1 / W2-W1]x8

(c) [W2-W1/W1 ]x8

(d) [W1 / W1-W2]x8

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Equivalent Weight & Normality
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