Aluminum will react with bromine to form aluminum bromide (used as an acid catalyst in organic synthesis). Al(s) + Br2(l) → Al2Br6(s) [unbalanced] How many moles of Al are needed to form 2.43 mol of Al2Br6?

4.86 moles of Al are needed to form 2.43 mol of Al2Br6.

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The answer to your question is 4.86 moles

Explanation:

Unbalanced Chemical reaction

                       Al(s)  +  Br₂ (l)   ⇒   Al₂Br₆ (s)

               Reactants      Elements      Products

                     1                     Al                    2

                     2                    Br                    6

Balanced chemical reaction

                     2 Al(s)  + 3Br₂ (l)   ⇒   Al₂Br₆ (s)

               Reactants      Elements      Products

                     2                     Al                    2

                     6                    Br                     6

Moles of Al = ?

Moles of Al₂Br₆ = 2.43 moles

- Use proportions to answer this question

              2 moles of Al 1 mol of Al₂Br₆

              x                      2.43 moles of Al₂Br₆

              x = (2.43 x 2)/1

             x = 4.86 moles of Al

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.