Question

what is the mass of a sample of ethanol that exactly fills a 200.0 ml container? the density of ethanol is 0.789 g/ml

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 solve for $m$, so we can re - arrange the formula to $m =
ho\times V$.

Step2: Substitute given values

We are given that $
ho = 0.789\ g/mL$ and $V=200.0\ mL$. Substituting these values into the formula $m=
ho\times V$, we get $m = 0.789\ g/mL\times200.0\ mL$.

Step3: Calculate mass

$m=0.789\times200.0\ g = 157.8\ g$

Answer:

$157.8\ g$