Balance the following chemical equation:

_Cr2O3+_Mg—>_Cr+_MgO

The answer to your question is Cr₂O₃  +  3Mg  ⇒   2Cr  +  3MgO

Explanation:

Data              

Unbalanced chemical reaction

               Cr₂O₃  +  Mg  ⇒   Cr  +  MgO

           Reactants        Elements       Products

                  2                      Cr                 1

                  3                       O                 1

                  1                        Mg               1

Balanced chemical reaction

               Cr₂O₃  +  3Mg  ⇒   2Cr  +  3MgO

           Reactants        Elements       Products

                  2                      Cr                 2

                  3                       O                 3

                  3                        Mg              3

Now the reaction is balanced

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.