For light with a wavelength of 12.5 nm, determine the energy of light in kj/mol for any constants: h=6.626*10^-34 j*s c=3.00*10^8 m/s for any conversions: 1m=10^9 nm 1j=1 kg * m^2/s^2 kilo= 10^3 i feel like i'm on the right path but i keep getting an incorrect just want to know how to do this so i can figure out if i'm close to the right mindset. the answer is 9570.

Energy is related to Wavelength as,

                                   E  =  h c / λ        (1)
As,
       h  =  6.626 × 10⁻³⁴ Js
       c  =  2.99 × 10⁸ ms⁻¹
       λ  =  12.5 nm = 1.25 × 10⁻⁸ m

Putting values in eq. 1,

             E  =  (6.626 × 10⁻³⁴ Js × 2.99 × 10⁸ ms⁻¹) ÷ 1.25 × 10⁻⁸ m

             E  =  1.585 × 10⁻¹⁷ J

             E  =  1.585 × 10⁻²⁰ kJ × 6.022 × 10²³

             E  =  9544.87 Kj/mol

It is called a neutralization reaction