A solution of \( \mathrm{Ni}\left(\mathrm{NO}_{3}\right)_{2} \) is ...

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A solution of \( \mathrm{Ni}\left(\mathrm{NO}_{3}\right)_{2} \) is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of \( \mathrm{Ni} \) is deposited at the cathode?
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