what is the density of indium?

Question

a piece of idium metal weighing 17.289 g is placed into 41.1cm^3 of ethyl alcohol (d=.789 g/cm^3) in a graduated cylinder, and it sinks to the bottom. The alcohol increases to 43.4cm^3.

Answer 1

Since the metal is fully submerged, the volume change of the alcohol equals the volume of the metal.  Divide the mass of the metal by the volume of the metal to get the density of the metal.

 

m = 17.289 g

 

V = 43.4 cm³ - 41.1 cm³ = 2.30 cm³

 

ρ = m/V = (17.289 g) / (2.30 cm³) ≅ 7.52 g/cm³