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Q.
The weight of silver (at wt. $= 108$ ) displaced by a quantity of electricity which displaces $560\, mL$ of $O _{2}$ at STP will be (volume of $1$ mole of gas at STP $22.4 \,L$ )
Solution:
According to faraday's $2^{\text {nd }}$ law $\frac{W_{A g}}{E_{A g}}=\frac{W_{O_{2}}}{E_{O_{2}}}$
$\frac{W_{A g}}{108}=\frac{\left(\frac{560}{22400}\right) \times 32}{8}$
$\therefore W_{ Ag }=10.8\, g$