Question

ethanol is a common laboratory solvent and has a density of 0.789 g/ml. what is the mass, in grams, of 138 ml of ethanol?

Explanation:

Step1: Recall density - mass - volume formula

The 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 = 0.789\ g/mL$ and $V=138\ mL$. Then $m=0.789\ g/mL\times138\ mL$.

Step3: Calculate the mass

$m = 0.789\times138=108.882\ g$

Answer:

$108.882$