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Author Question: The concentration of which component of the atmosphere has increased dramatically since the ... (Read 57 times)

ts19998

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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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Answer to Question 1

B

Answer to Question 2

FALSE




ts19998

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Reply 2 on: Aug 27, 2018
Gracias!


nanny

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

 

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