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Author Question: Choose the reaction that illustrates Hf for Ca(NO3)2. A) Ca(s) + N2(g) + 3O2(g) Ca(NO3)2(s) B) ... (Read 88 times)

jwb375

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Choose the reaction that illustrates Hf for Ca(NO3)2.
 
  A) Ca(s) + N2(g) + 3O2(g)  Ca(NO3)2(s)
  B) Ca2+(aq) + 2 NO3-(aq)  Ca(NO3)2(aq)
  C) Ca(s) + 2 N(g) + 6 O(g)  Ca(NO3)2(s)
  D) Ca(NO3)2(aq)  Ca2+(aq) + 2 NO3-(aq)
  E) Ca(NO3)2(s)  Ca(s) + N2(g) + 3O2(g)

Question 2

How would the concentration change if a 1.0 L flask of 1.0 M NaCl were left uncapped on a laboratory bench for several days. Why?
 
  What will be an ideal response?



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Pariscourtney

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Answer to Question 1

A

Answer to Question 2

The concentration would slowly increase as water from the solution evaporated. This is because the amount of NaCl in the flask would remain constant while the amount of water decreases.




jwb375

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Reply 2 on: Aug 27, 2018
YES! Correct, THANKS for helping me on my review


patma1981

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Reply 3 on: Yesterday
Wow, this really help

 

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