The zinc-air battery is a less expensive alternative to silver batteries for use in hearing aids. The cell reaction is2Zn(s) + O₂(g) → 2ZnO(s) A new battery weighs 0.275 g. The zinc accounts for exactly 1/10 of the mass, and the oxygen does not contribute to the mass because it is supplied by the air.(a) How much electricity (in C) can the battery deliver?

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pankajpal6971 pankajpal6971 · Answer 1 · 2022-08-26T12:45:58+02:00

The amount of electricity (in C) the battery deliver is 81.15 C.

2Zn + O2 ----- 2 ZnO

Number of electron transferred = 4

Amount of zinc can be calculated as

= (10/100) × 0.275

= 0.0275 g

= amount of zinc × (2mol Zn/ 130.76 g Zn) × (4mol electron/2mol electron)

= 0.0275 g × 2/ 130.76

= 8.41 × 10^(-4) mol electron.

As we know that charge of 1 mol of electron = 9.65 × 10^4

So, charge of 8.41 × 10^(-4) = 8.41 × 10^(-4) × 9.65 × 10^4

= 81.15 C.

Thus, we calculated that the amount of electricity (in C) the battery deliver is 81.15 C.

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