How many moles of \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} ...

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How many moles of \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) can be reduced by 1
P mole of \( \mathrm{Sn}^{2+} \)

W
(1) \( 1 / 3 \)
(2) \( 1 / 6 \)
(3) \( 2 / 3 \)
(4) 1
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