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Author Question: How many oxygen atoms are in 3.00 g of sodium dichromate, Na2Cr2O7? A) 0.0801 oxygen atoms B) ... (Read 105 times)

jilianpiloj

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on: Aug 27, 2018
How many oxygen atoms are in 3.00 g of sodium dichromate, Na2Cr2O7?
 
  A) 0.0801 oxygen atoms
  B) 9.85  1020 oxygen atoms
  C) 6.90  1021 oxygen atoms
  D) 4.83  1022 oxygen atoms

Question 2

Ka for HX is 7.5  10-12. What is the pH of a 0.15 M aqueous solution of NaX?
 
  A) 7.97
  B) 1.96
  C) 6.00
  D) 8.04
  E) 12.10


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xoxo123

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

D

Answer to Question 2

E


jilianpiloj

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Reply 2 on: Aug 27, 2018
Great answer, keep it coming :)

debra928

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Reply 3 on: Yesterday
Wow, this really help

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