Question

*69. a shiny, gold - colored bar of metal weighing 57.3 g has a volume of 4.7 cm³. is the bar of metal pure gold?

Explanation:

Step1: Recall density formula

Density $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume.

Step2: Substitute given values

Given $m = 57.3\ g$ and $V=4.7\ cm^{3}$, then $
ho=\frac{57.3\ g}{4.7\ cm^{3}}\approx12.2\ g/cm^{3}$.

Step3: Compare with gold density

The density of pure gold is approximately $19.3\ g/cm^{3}$. Since $12.2\ g/cm^{3}
eq19.3\ g/cm^{3}$, the metal is not pure gold.

Answer:

No, the bar of metal is not pure gold.