A flask contains 0.230 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask.

The amount of bromine present in the flask = 0.230 moles

Avagadro's number states the number of units present in a single mole.

Avagadro's number is 6.022 x 10²³ units, these could be atoms in the case of elements or molecules in compounds.

the number of bromine molecules in 1 mol = 6.022 x 10²³ molecules of Br bromine molecules in 0.230 mol = 6.022 x 10²³ molecules/mol x 230 mol

number of bromine molecules in the flask = 1.385 x 10²⁶ Br₂ molecules