96.5g
Explanation:
Given parameters:
Volume of Au = 50cm³
Density of Au = 19.3 g/cm³
Unknown:
Mass of the  gold  = ?
Solution:
Density is the mass per unit volume of a compound.
 Density  =
 Mass  = density x volume
Insert the parameters and solve;
  Mass  = 19.3 g/cm³ x 50cm³  = 96.5g