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Electric Current

In a H2-O2 ...

Question

In a $H_{2} - O_{2}$ fuel cell. $6.72 L$ of hydrogen at NTP reacts in 15 minutes, the average current produced in amperes is:

64.3

amp

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643.3

amp

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6.43

amp

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0.643

amp

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Solution

The correct option is A $64.3$ amp
Applying faraday first law,
$\frac{Q}{F} = m o l e \times V . f .$
$\frac{I t}{F} = \frac{6.72}{22.4} \times 2$
$I = \frac{6.72 \times F}{22.4 \times 15 \times 60} \times 2$
$I = 64.3 a m p$

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