Question

What is the mass of 61.5 mL of ethanol? The density of ethanol at room temperature = 0.789 g/mL.

Answer 1

We are given that the density of ethanol is 0.789 g/mL. Density is defined as:

$D=\frac{m}{V}$

Where:

$\begin{gathered} D=\text{ density} \\ m=\text{ mass} \\ V=\text{ volume} \end{gathered}$

Since we are asked about the mass we will multiply the formula by "V" on both sides:

$DV=m$

Substituting the values we get:

$(\frac{0.789g}{mL})(61.5mL)=m$

Solving the operations we get:

$48.5g=m$

Therefore, the mass of ethanol is 48.5 grams.