Oxide Watch Batteries
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 5 ENERGIZER 395 399 SR927SW SR927W watch battery AG7  US $4.00
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 LaserMax Glock Sights Glock 20 21 LMS 1151P US $289.91
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 4 PC ENERGIZER 364 363 WATCH BATTERIES SR621W SR621SW US $2.57
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 2 NEW ENERGIZER 364 363 SR621W SR621SW watch battery US $1.99
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 5 NEW ENERGIZER 364 363 SR621W SR621SW watch battery US $2.99
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 Panasonic CR2032 Lithium Coin Cell LOWEST TOTAL COST US $.99
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 1 PC MAXELL 364 363 Watch Batteries SR621SW SR 621 SW US $1.45
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 5 PC ENERGIZER WATCH BATTERIES 371 370 SR920SW EXP 2018 US $4.09
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 20 PC ENERGIZER 377 376 WATCH BATTERIES SR626SW SR626W US $10.25
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 2 pc NEW Energizer CR1616 ECR 1616 Batteries 3V Exp2021 US $3.47
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 5 SR516SW 317 ENERGIZER WATCH BATTERY FREE SHIPPING US $3.50
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 5 PC ENERGIZER 364 363 WATCH BATTERIES SR621W SR621SW US $3.10
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 Energizer 379 Button Cell Watch Batteries 5 pack US $3.45
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 5 pc MAXELL 337 SR416SW SR416 WATCH BATTERY SILVER OXIDE NEW US $6.40
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 LaserMax LMS 1141P Guide rod Laser Glock 17 22 31 37 US $289.90
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 Sony 377 SR626SW Silver Oxide Button Battery x 100 US $31.45
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 5 NEW Silver Oxide 321 SR616SW batteries SR616 FREE SH US $2.48
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 2 NEW SONY 315 SR716SW SR716 silver oxide watch battery US $1.99
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 5 364 ENERGIZER WATCH BATTERIES FREE SHIPPING US $3.10
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 1 maxell 394 SR936SW SR936 V394 D394 Watch Battery US $2.75
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 5 Maxell 364 SR621SW SR621 SR60 D364 V364 watch battery US $3.79
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 2 pcs Energizer 303 357 SR44SW SR44W Silver Oxide Battery EPX76 A76 US $3.59
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 Maxell Lithium 3V Batteries Size CR2032 Pack of 5 US $2.79
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 Sony 371 SR920SW Silver Oxide Button Battery 155V X5 US $3.99
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 FIVE 5 MAXELL SR621SW 364 WATCH BATTERY SILVER OXIDE US $3.99
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 10 NEW 377 RENATA WATCH BATTERIES FREE SHIPPING US $6.10
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 1 maxell 395 SR927SW SR927 V395 D395 LA Watch Battery US $2.25
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 1 NEW 335 RENATA WATCH BATTERY FREE SHIPPING US $2.45
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 5 317 ENERGIZER WATCH BATTERIES FREE SHIPPING US $4.90
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 5 Renata 395 Watch Batteries SR927SW V395 D395 610 LA US $5.19
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 50 MAXELL 379 COIN CELL BATTERIES FRESH US $9.99
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 2 Sony 377 SR626SW Silver Oxide Button Battery US $2.49
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 5 399 395 NEW ENERGIZER WATCH BATTERIES FREE SHIPPING US $4.55
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 1 NEW 394 380 RENATA FACTORY FRESH WATCH BATTERIES FREE SHIPPING US $2.25
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 2 MAXELL 379 SR521SW Watch Battery FRESH Expire 2014 US $2.50
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 20 NEW ENERGIZER 377 376 SR626SW SR626W watch battery US $8.89
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 3 341 ENERGIZER WATCH BATTERY FREE SHIPPING US $7.20
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Need help with electrochemistry?
One kind of battery used in watches contains mercury (II) oxide. As current is drawn, the mercury oxide is reduced to mercury.
HgO(s) + H2O( l) + 2 e- ® Hg(l) + 2 OH-(aq)
If a watch draws 1.0 ´ 10-5 amperes continuously for 1,200 days, what mass of Hg(l) is formed?
a. 0.0053 g
b. 0.54 g
c. 1.1 g
d. 2.2 g
e. 4.66 g
Hg 2+ + 2e- >> Hg
t = 60 x 60 x 24 x 1200 = 103680000 s
1.0 x 10^-5 Coulomb / s x 103680000 s = 10268 Coulomb
10268 Coulomb / 96500 Coulomb / Faraday = 0.0107 Faraday
0.017 Faraday ( 1 mole Hg / 2 Faradays) = 0.00537 mole
0.00537 mole x 200.59 g/mol = 1.1 g
Batteries for every need!!!!