What am I doing wrong. I\'m using the equation upsidedown y=hc/e setting that up

Question

What am I doing wrong. I'm using the equation upsidedown y=hc/e setting that up i get y=(6.626x10^-34)(-2.178x10^-18)/(-2.178 x 10^-18 x 1/25) somehow I'm getting the wrong answer. What is the maximum wavelength of light capable of removing an electron from a hydrogen atom in the energy states characterized by n = 5? Answer in nm ____ (rounded to one decimal place) (The Rydberg constant for hydrogen is approximately ?2.178x10?18 J.) No links to webpages please. I want to know specifically what I am doing wrong.

Explanation / Answer

Use the Rydberg formula 1/(mwavelength) = Rh ( 1/na^2 - 1/nb^2) Rh is the Rydberg constant 1.097x10^7 m^-1 na and nb are integers for the quantum number, n I'll use w for wavelength 1/w = 1.097x10^7 ( 1/1^2 - 1/2^2) 1/w = 1.097x10^7 m^-1 *( 1 - 1/4) 1/w = 1.097x10^7 m^-1 *( 3/4) 1/w= 8227500 w = 1/(8227500) w= 1.21x10^ -7 m if you convert to frequency, v then v will be 2.468x10^15 s^-1

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