Be sure to answer all parts.
Calculate ΔG° for the following reaction at 25 °C:
3Mg(s) + 2Al³⁺(aq) ⇆ 3Mg²⁺(aq) + 2Al(s)
Enter your answer in scientific notation.

___ x 10 ⁽⁻⁻⁾ kJ/mol