Question 1
Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 x 1014 Hz.
A)
704 nm
B)
158 nm
C)
466 nm
D)
633 nm
E)
142 nm
My answer: D.633 nm
Question 2
How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy?
A)
4.03 x 1028 photons
B)
3.06 x 1030 photons
C)
1.80 x 1024 photons
D)
3.37 x 1019 photons
My answer: C. 1.80 x 10^24 photons (ignore the incorrect ..1024..I meant 10^24)
Question 3
Determine the shortest frequency of light required to remove an electron from a sample of Ti metal, if the binding energy of titanium is 3.14 x 103 kJ/mol.
A)
4.74 x 1015 Hz
B)
6.19 x 1015 Hz
C)
1.27 x 1015 Hz
D)
7.87 x 1015 Hz
E)
2.11 x 1015 Hz
My answer : D 7.87 x 10^15 Hz (again.. ignore the incorrect typing of the exponent)
Question 4
Determine the energy change associated with the transition from n=2 t n=5 in the hydrogen atom.
A)
-2.18 x 10-19 J
B)
6.54 x 10-19 J
C)
4.58 x 10-19 J
D)
-1.53 x 10-19 J
E)
2.18 x 10-19 J
My answer: C 4.58 x 10^/19 J
Question 5
What are the possible values of l if n=6?
A)
-4, -3, -2, -1, 0, +1, +2, +3, +4
B)
-5, -4, -3, -2, -1, 0, +1, +2, +3, +4, +5
C)
0, 1, 2, 3, 4, or 5
D)
6
My answer: C 0,1,2,3,4, or 5
2 answers
5 answers