A student is given the question: "what is the mass of a gold bar that is 7.379 * 10-4 m3 in volume? the density of gold is 19.3 g/cm3."

The density of any substance can be calculated using the following rule:

density = mass / volume

Therefore,

mass = density x volume

First we need to standardize the units:

volume = 7.379 x 10^-4 m^3

density = 19.3 gm / cm^3 = 19300 kg / m^3

Now, we will substitute with these values in the above mentioned equation to calculate the mass:

mass = density x volume

= 19300 x 7.379 x 10^-4 = 14.24147 kg