Answer:
The volume of an object is the amount of space it takes up. In this question, we know that the volume of the gold bar is 7.379 x 10^-4 m^3. We also know that the density of gold is 19.3 g/cm^3. To calculate the mass of the bar, we need to multiply the density of gold by the volume of the bar. The mass will be in grams.
Density = mass / volume
mass = density * volume
mass = (19.3 g/cm^3) * (7.379 x 10^-4 m^3)
mass = (19.3 g/cm^3) * (7.379 x 10^-4 m^3) * (10^6 cm^3/m^3)
mass = 140.4 g
So the mass of the gold bar is 140.4 g (rounded to 3 significant figures)