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Author Question: The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remain after 9.50 ... (Read 131 times)

james0929

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on: Aug 27, 2018
The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remain after 9.50 years?
 
  A) 0.565
  B) 7.03  10-22
  C) 7.076
  D) 1.095
  E) 1.435

Question 2

How many carbons are there in heptane?
 
  A. Five
   B. Six
   C. Seven
   D. Eight


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bob

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

A

Answer to Question 2

C


james0929

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Reply 2 on: Aug 27, 2018
Excellent

okolip

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Reply 3 on: Yesterday
Gracias!

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