Is a ring whose mass is $52.3g$ , and whose volume is $3.52cm^3$ likely to be platinum metal? $rho_"platinum"-=21.45gcm^-3$ .

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Answer 1 · 2017-09-02T07:24:15

Well this site quotes the density of platinum as $21.45*g*cm^-3$ .

The measured density of the ring is..... $rho="mass"/"volume"$ ,

i.e. $rho=(52.3*g)/(3.52*cm^3)=14.9*g*cm^-3$ .

Given that density is a fundamental property of pure solids and pure liquids, it seems unlikely that we have got a lump of platinum.

Is a ring whose mass is 52.3*g52.3*g, and whose volume is 3.52*cm^33.52*cm^3 likely to be platinum metal? rho_"platinum"-=21.45*g*cm^-3rho_"platinum"-=21.45*g*cm^-3.