Question

an iron pipe has a density of 7.86 g/ml and a volume of 324.4 ml. what is the mass of the iron pipe?

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 need to find $m$, and we can re - arrange the formula to $m =
ho\times V$.

Step2: Substitute given values

Given $
ho = 7.86\ g/mL$ and $V=324.4\ mL$. Then $m=7.86\times324.4$.
$m = 7.86\times324.4=7.86\times(300 + 20+4 + 0.4)=7.86\times300+7.86\times20+7.86\times4+7.86\times0.4$
$=2358+157.2 + 31.44+3.144=2549.784\ g$

Answer:

$2549.784\ g$