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In: Physics

Standard Gold Bars come in various sizes. One that is available for purchase is 17.8 cm...

Standard Gold Bars come in various sizes. One that is available for purchase is 17.8 cm X 9.21 cm X 5.08 cm. How many moles of gold are in this bar?

For Gold: A = 197  ρ=19300 kg/m3

Solutions

Expert Solution

Answer:- Number of moles :  

Explanation:-

Given:

  • Dimensions of the gold bar :
  • Molar mass of the gold :
  • Density of gold : ​​​​​​​

Volume of this bar in cubic meter is given by,

Density of the gold in grams per cubic meter is,

Density of defined as the mass per unit volume given as,

This is the mass of the gold bas in grams.

Now, number of moles is given by,

Thus, 81.6 moles of gold are in this bar.

genius_generous answered 2 years ago
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