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Modern electroplaters can cover a surface area of 60.0m^2 with 1oz of gold(volume 1.611 cm^3) how thick is Au?

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possible ans.

2.68 X 10^-8 m

1.34 X 10^-9 m

1.67 X 10^-6 m

3.33 X 10^-7 m

2.38 X 10^-7 m

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  1. A=60 m², V=1.611 cm³ =1.611*10^(-6) m³

    d=V/A=1.611e-06/60=2.685*10^(-8) m

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