is there any alloy which is equally dense with gold?

Answer 1

density:

Tungsten: 19.25 g/cm^3
Gold: 19.282 g/cm^3
Platinum: 21.46 g/cm^3

So, for example, to produce exactly the same density as a pure gold coin, one would just need to create an alloy consisting of 98.55% tungsten and 1.45% platinum.

Answer 2

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