Answer:
16.8%
Explanation:
31% NaOH molar mass 40 gm
69% H2O molar mass 18 gm
1000 gm would be
310 gm NaOH or 310/40 = 7.75 moles
690 gm of H2O or 690/18 = 38.333 moles
7.75 / (7.75 + 38.333) = .168 mole fraction
Except catalyst because catalyst typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.
If an atom suffers from a collision, that causes an electron to jump from a lower to higher state, it is called collisional excitation
