The relation between mass, density, and volume is
[tex]m=d\times V[/tex]m is the mass
d is the density
V is the volume
Since the volume of the sample is 8 ml
Since the density of the gold is 19.4 g/ml
Then
[tex]\begin{gathered} m=19.4\times8 \\ m=155.2g \end{gathered}[/tex]The mass of the gold sample is 155.2 grams