Step 1 :Convert mass to grams: \( 2 \mathrm{~kg} \cdot 1,000 \dfrac{\mathrm{g}}{\mathrm{kg}} = 2,000 \mathrm{~g} \)
Step 2 :Use the formula for density: \( \text{Density} = \dfrac{\text{mass}}{\text{volume}} \)
Step 3 :Calculate density: \( \text{Density} = \dfrac{2,000 \mathrm{~g}}{3,000 \mathrm{~cm}^{3}} = \dfrac{2}{3} \mathrm{~g} / \mathrm{cm}^{3} = 0.6667 \mathrm{~g} / \mathrm{cm}^{3} \)