If \( M_{\text {normal }} \) is the normal molecular mass and \( \alpha \) is the degree of ioni...

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If \( M_{\text {normal }} \) is the normal molecular mass and \( \alpha \) is the degree of ionization of \( \mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \), then the abnormal molecular mass of the complex in the solution will be:
(a) \( M_{\text {normal }}(1+2 \alpha)^{-1} \)
(b) \( M_{\text {normal }}(1+3 \alpha)^{-1} \)
(c) \( M_{\text {normal }}(1+\alpha)^{-1} \)
(d) equal to \( M_{\text {normal }} \)
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