Question

1. the density of gold is 19.3 g/cm³. if a sample of pure gold has a volume of 3.39 cm³, what is the mass of the sample?

Explanation:

Step1: Recall density formula

The density formula is $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume. We can re - arrange it to solve for mass: $m =
ho\times V$.

Step2: Substitute given values

Given $
ho = 19.3\ g/cm^{3}$ and $V=3.39\ cm^{3}$. Then $m=19.3\times3.39$.

Step3: Calculate the mass

$m = 19.3\times3.39=65.427\ g$.

Answer:

$65.427\ g$