### Homework number 1.25a

Posted:

**Mon Apr 23, 2018 10:28 am**Why is the power of the final answer -19? I keep getting a different result every time I repeat the calculation.

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=15&t=31059

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Posted: **Mon Apr 23, 2018 10:28 am**

Why is the power of the final answer -19? I keep getting a different result every time I repeat the calculation.

Posted: **Mon Apr 23, 2018 12:36 pm**

Too find the energy emitted by the photon you use the formula: E=hc/wavelength

First: convert wavelength from nanometers to meters (589*10^-9)

Then plug it into the equation: (6.626*10-34)(3*10^8)/(589*10^-9)

Energy= 3.37*10^-19

First: convert wavelength from nanometers to meters (589*10^-9)

Then plug it into the equation: (6.626*10-34)(3*10^8)/(589*10^-9)

Energy= 3.37*10^-19

Posted: **Mon Apr 23, 2018 11:43 pm**

What units would the final answer be in?

Posted: **Tue Apr 24, 2018 5:12 pm**

Yadira Flores 1G wrote:What units would the final answer be in?

The final answer would be in Joules, since it is asking for the energy.