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Author Question: Ka for HCN is 4.9 10-10. What is the pH of a 0.068 M aqueous solution of sodium cyanide? A) 0.74 ... (Read 172 times)

asd123

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Ka for HCN is 4.9  10-10. What is the pH of a 0.068 M aqueous solution of sodium cyanide?
 
  A) 0.74
  B) 2.96
  C) 11.07
  D) 13.24
  E) 7.00

Question 2

How many iron(II) ions, Fe2+ are there in 5.00 g of FeSO4?
 
  A) 5.46  10-26 iron (II) ions
  B) 1.98  1022 iron (II) ions
  C) 1.83  1025 iron (II) ions
  D) 4.58  1026 iron (II) ions

Question 3

A sample of air from a home is found to contain 7.2 ppm of carbon monoxide. This means that if the total pressure is 695 torr, then the partial pressure of CO is ________ torr.
 
  A) 5.0  103
  B) 5.0  10-3
  C) 5.0
  D) 1.0  104
  E) 9.7  107


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Expo

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asd123

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


ryhom

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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