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 material : 15.06 g
volume : 0.78 ml
The density of unknown material :
![\tt \rho=(15.06)/(0.78)\\\\\rho=19.31~g/ml](https://img.qammunity.org/2021/formulas/chemistry/high-school/4c9x94w8gj76fldq0av5vtjv868tu6wd26.png)
Materials that match the density: gold