A nitrogen oxide is 63.65 by mass nitrogen. The molecular formula ...

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A nitrogen oxide is 63.65 by mass nitrogen. The molecular formula could be ________.
 
  A) NO
  B) NO2
  C) N2O
  D) N2O4
  E) either NO2 or N2O4

Question 2

One advantage of extracting organic molecules with ethanol or supercritical carbon dioxide is that there is less hazardous waste generated.
 
  Indicate whether the statement is true or false

[ilianabrrr]

Answer to Question 1

C

Answer to Question 2

TRUE

[fasfsadfdsfa]

YES! Correct, THANKS for helping me on my review

[nathang24]

Thanks for the timely response, appreciate it