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Author Question: The concentration of which component of the atmosphere has increased dramatically since the ... (Read 61 times)

ts19998

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on: Aug 27, 2018
The concentration of which component of the atmosphere has increased dramatically since the beginning of the industrial era?
 
  A) argon
  B) carbon dioxide
  C) sulfur dioxide
  D) krypton

Question 2

A catalyst acts by raising the amount of energy available for a reaction to occur.
 
  Indicate whether the statement is true or false


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Perkypinki

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

B

Answer to Question 2

FALSE


ts19998

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Reply 2 on: Aug 27, 2018
Thanks for the timely response, appreciate it

Sarahjh

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Reply 3 on: Yesterday
Gracias!

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