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Question 1 of 2
1. Question
.
A chemist examining a hydrogen emission spectrum measures the frequency of the convergence limit of hydrogen to be 3.42 × 1015 Hz.
a. Use this to calculate the ionization energy, in joules, for a hydrogen atom.
Answer (to 3 sig. figs): * 10-18 J
b. Calculate the energy in kJmol-1
Answer (to 3 sig. figs): * 103 kJmol-1
c. Calculate the corresponding wavelength of the frequency that was measured.
Answer (to 3 sig. figs): * 10-8m
Constants and formulas from sections 1 and 2 of the data booklet:
E=hν c=νλ
Avogadro’s constant (L) = 6.02 × 1023 mol−1
Planck’s constant (ℎ) = 6.63 × 10−34 J s
Speed of light = 3.00 × 108 ms−1
Correct
3 / 3 Points
Incorrect / 3 Points
Question 2 of 2
2. Question
.
A student measures the wavelength of the convergence limit of hydrogen to be 90.9 nm
a. Find the corresponding frequency, in Hertz (s-1) , of the wavelength that was measured.
Answer (to 3 sig. figs): * 1015Hz
b. Calculate the ionization energy, in joules, for a hydrogen atom
Answer (to 3 sig. figs): * 10-18 J
c. Calculate the ionization energy in kJmol-1
Answer (to 3 sig. figs): * 103 kJmol-1
Constants and formulas from sections 1 and 2 of the data booklet:
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