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

Question

Physics

Tommy Blanchard

6 January, 07:36

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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Answers (1)

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Quinton Huang · Answer 1

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