Question

1. the element bromine (br) at room temperature is a liquid with a density of 3.12 g/ml. calculate the mass of 125 ml of bromine. also, what volume does 85.0 grams (g) of bromine (br) occupy?

Explanation:

Step1: Calculate mass of 125 mL bromine

Use the density - mass - volume formula $m =
ho V$, where $
ho = 3.12\ g/mL$ and $V = 125\ mL$.
$m=3.12\times125$
$m = 390\ g$

Step2: Calculate volume of 85.0 g bromine

Use the formula $V=\frac{m}{
ho}$, where $m = 85.0\ g$ and $
ho = 3.12\ g/mL$.
$V=\frac{85.0}{3.12}\approx27.24\ mL$

Answer:

The mass of 125 mL of bromine is 390 g. The volume that 85.0 g of bromine occupies is approximately 27.24 mL.