9. Calculate the energy of an electron in the 3d principal energy level. a)-7.26
ID: 696254 • Letter: 9
Question
9. Calculate the energy of an electron in the 3d principal energy level. a)-7.26x10 b)+7.26x1019J c) . 2.42x10 d) + 2.42x101 10. Calculate the energy of the photon emitted when an electron makes a transition from n-3 ton-1. a) 1.94x10-18J b) +1.94x101 c)-3.65x103 d)+3.65x1013 11. Which transition would result in emitted light with a wavelength too long to be visible? b) n 5 n=2 c) n=5 n=3 Use the following information for questions 12-14: A 27.6 gram metal sample at 100.0° C was placed in 55.0 g of water. The water's temperature rose from 22.10 C to a maximum of 26.10° C, where the temperature remained for several minutes before starting to slowly fall. 12. Determine quao. a) 920. J b) 1.47x10 c) 1.70x104 J d) 461J 13. What is the change in temperature for the metal? a) +4.00C b)-4.00C c)+73.9C d)- 73.9C 14. What is the specific heat of the metal? a) 0.226 J/gc b) 0.451 J/g"C c) 2.22 J/g"c d) 0.721/g°C Next pageExplanation / Answer
9)
En = -RH/n^2
here:
RH = 2.18*10^-18 J
n = 1
So,
E3 = -RH/3^3
= -2.18*10^-18/9
= - 2.42*10^-19 J
Answer: c
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