Final answer:
To calculate the mass of liquid bromine, the density of bromine is needed.
Step-by-step explanation:
To calculate the mass of 542 mL of bromine, we need to know the density of bromine. Unfortunately, the question does not provide that information. If we assume the density of bromine to be 3.17 g/mL, then the mass would be 542 mL x 3.17 g/mL = 1719.14 g. However, without the actual density value, we cannot accurately calculate the mass.