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Author Question: The half-life of radon-222 is 3.83 d. If a sample of radon initially contains 6.00 108 radon atoms, ... (Read 99 times)

lidoalex

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on: Jul 29, 2018
The half-life of radon-222 is 3.83 d. If a sample of radon initially contains 6.00  108 radon atoms, how many of them are left after 10.0 d?
 
  A) 9.82  107
  B) 7.67  107
  C) 8.34  108
  D) 7.29  108
  E) 8.56  108

Question 2

The speed of sound varies with
 
  A) loudness.
  B) frequency.
  C) wavelength.
  D) all of the above
  E) none of the above


Ahnyah

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

Answer: E


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