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Author Question: The Big Bang predicts that after the universe was born it A) consisted of an equal mixture of all ... (Read 51 times)

fox

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on: Jul 27, 2018
The Big Bang predicts that after the universe was born it
 
  A) consisted of an equal mixture of all the chemical elements
  B) was completely empty
  C) consisted of mostly hydrogen and helium
  D) consisted of mostly carbon, hydrogen, oxygen and nitrogen

Question 2

How does the spectrum of a molecule differ from the spectrum of an atom?
 
  A) A molecule does not have spectral lines due to electrons changing energy levels.
  B) A molecule has additional spectral lines due to changes in its rotational and vibrational energies.
  C) Molecules only have spectral lines at ultraviolet wavelengths.
  D) Most atoms only have spectral lines at infrared wavelengths.
  E) An atom has a wider range of spectral lines than molecules.


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blfontai

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Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

B


fox

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Reply 2 on: Jul 27, 2018
Gracias!

vickybb89

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Reply 3 on: Yesterday
Excellent

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