To calculate the volume of the metal block, you can use the formula for density:
\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]
Rearranging the formula to calculate the volume gives us:
\[ \text{Volume} = \frac{\text{Mass}}{\text{Density}} \]
Given:
- Mass = 45 g
- Density = 9 g/cm³
Now substituting the values into the formula:
\[ \text{Volume} = \frac{45 , \text{g}}{9 , \text{g/cm}^3} = 5 , \text{cm}^3 \]
Thus, the volume of the metal block is 5 cm³.