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How did the mass change when the silver coin was made to look gold?

It decreased.
It stayed the same.
It increased.


Sagot :

Density allows you to find that for the coin to look like gold, the correct answer is: the mass must INCREASE

Density is the relationship between the mass of a body and its volume is constant for solids and liquids.

         ρ = m / V

where ρ is the density, m the mass and V the volume of the body

The mass of the coin is

         m = ρ V

initially the coin is silver (Ag) with density, ρ_{Ag} = 10.94 g/cm³ and the density of gold (Au) is ρ_{Au} = 19.32 gr/cm³

As the density of gold is greater than the density of silver, we must use some chemical method, for example electroplating, to introduce a small layer of gold or other golden material on the surface, as this layer is very thin, the increase in volume is very small, the mass of the coins is

          m₁ = ρ_{Ag] V

          m₂ = ρ_{Au} V

where m₁ and m₂ are the masses of the silver and gold coins, respectively

What

           ρ_{Au} > ρ_{Ag}

         

the mass of the coin must increase

With the density we can find that for the peel to look like gold the mass must INCREASE

learn more about density here: brainly.com/question/15164682

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