The density for gold is 19.3 g/cm3. What would be the mass of a 25 cm3 piece of gold?

To find the mass of a 25 cm³ piece of gold, you can use the formula:

\[ \text{Mass} = \text{Density} \times \text{Volume} \]

Given that the density of gold is 19.3 g/cm³ and the volume is 25 cm³, you can plug in the values:

\[ \text{Mass} = 19.3 , \text{g/cm}^3 \times 25 , \text{cm}^3 \] \[ \text{Mass} = 482.5 , \text{g} \]

So the mass of a 25 cm³ piece of gold is 482.5 g.

The correct answer is B. 482.5g.