Question

a shiny, gold - colored bar of metal weighing 90.7 g has a volume of 4.7 cm³. is the bar of metal pure gold? the density of gold is 19.3 g/cm³.

yes, the density is 19.3.

no, the density is not 19.3.

yes, the bar of metal is shiny

no, the volume is too low.

Explanation:

Step1: Recall density formula

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

Step2: Substitute given values

Given $m = 90.7$ g and $V=4.7$ cm³, then $
ho=\frac{90.7}{4.7}\approx19.3$ g/cm³.

Step3: Compare with gold density

The density of gold is 19.3 g/cm³. Since the calculated density of the metal bar is approximately 19.3 g/cm³, it is pure gold.

Answer:

yes, the density is 19.3.