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Fool's gold is so called because it bear...

Fool's gold is so called because it bears a visual similarity to real gold. A block of fool's gold which measures `1.50 cm xx 2.50 cm xx 3.00 cm` has a mass of `56.25 g`. How can this material be distinguished from real gold by means of some physical property ? (Given density of real gold `= 19.3 g cm^(-3)`)

Text Solution

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From the available data, the density of Fool's gold can be calculated. As expected, it is going to be different form that of real gold. This will quite obviously prove that Fool's gold is different from real gold
Volume of Fool's gold `= (1.50 "cm")xx(2.50 "cm")xx(3.00"cm")=11.25 "cm"^(3)`
Density of Fool's gold `= ("Mass")/("Volume")=((56.25g))/((11.25"cm"^(3)))=5.0" g cm"^(-3)`
This distinction between real gold and fool's gold can thus be made.
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