Masterin Chemistry: Extra Credit Homework Unit 4-Mozilla Firefox https session m
ID: 579538 • Letter: M
Question
Masterin Chemistry: Extra Credit Homework Unit 4-Mozilla Firefox https session master ngchemistry.com/myct temve offsetsnext assignmentProbler ID-93452625 4Exercise 7.72 Enhanced with Feedback Res Exercise 7.72- Enhanced with Feedback Part A You may want to reference this problem. An electron in a hydrogen ator relaxes to the What is the value of n for the level in which the electron originated? Express your answer as an integer. 3 while completing n-4 level, emitting light of 1 8 THz 48 Submit My Answers Give Up Proude Feedback 78 ,88 gCh 17Explanation / Answer
we have:
frequency = 138 THz = 1.38*10^14 s-1
we have below equation to be used:
wavelength = speed of light/frequency
=(3.0*10^8 m/s)/(1.38*10^14 s-1)
= 2.174*10^-6 m
wavelength = 2.174*10^-6 m
1/wavelength = R* (1/nf^2 - 1/ni^2)
R is Rydberg constant. R = 1.097*10^7
1/wavelength = R* (1/nf^2 - 1/ni^2)
1/2.174*10^-6 = 1.097*10^7* (1/4^2 - 1/ni^2)
(1/4^2 - 1/ni^2) = 4.193*10^-2
1/ni^2 = 2.057*10^-2
ni^2 = 49
ni = 7
Answer: 7