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Author Question: With respect to volume, approximately what percentage of the air we breathe is composed of elemental ... (Read 29 times)

mydiamond

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on: Aug 27, 2018
With respect to volume, approximately what percentage of the air we breathe is composed of elemental argon?
 
  A)  20
  B)  1
  C)  80
  D)  50

Question 2

The most abundant element (by mass) in the human body is
 
  A) oxygen.
  B) carbon.
  C) nitrogen.
  D) water.


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BUTTHOL369

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

B

Answer to Question 2

A


mydiamond

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Reply 2 on: Aug 27, 2018
Excellent

xiaomengxian

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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