The unknown material : gold
Further explanation
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
![\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}](https://img.qammunity.org/2021/formulas/chemistry/high-school/kdpie3m9qgvxaejhoylcwsiahrslo6tugv.png)
ρ = density
m = mass
v = volume
mass of unknown the material : 15.06 g
volume = 0.78 ml
The density :
![\tt \rho=(m)/(V)\\\\\rho=(15.06)/(0.78)=19.31~g/ml](https://img.qammunity.org/2021/formulas/chemistry/high-school/gprokc2fwc5rvpec9phddsoettir139xbb.png)
materials that match the density: gold