e0matintipierry6 e0matintipierry6

24-11-2016
Physics

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a very thin layer of gold plating was placed on a metal tray that measures 25.22 cm by 13.22cm. The gold plating increased the mass of the plate by 0.0512 g. Calculate the thickness of the plating. The density of gold is 19.31 g/cm ^3

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syed514 syed514

27-11-2016

As the volume of gold is

Volume = mass/ density

V = 0.0512g / 19.31gcm^−3
=0.0026

Volume of gold = L. W. T
0.0026 = 52.22 * 13.22 * T
Thickness T = 0.0026 / 690.43

T= 3.7 * 10^-6

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