About ----------of air contain oxygen

Options :
  1. 2/3
  2. 1/5
  3. 2/5
  4. 1/4
Answer and Explanation :-

Answer: Option 2

Explanation:

Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : With increase in the moisture in air, atmospheric pressure

Next Question : When air is cooled, carbondioxide separeates as dry ice at

Click here for online test on General Science

Responses


 (Getemail alerts when others member replies)







Well, I can understand how you feel. You worked hard, studying for the spelling bee, and I suppose you feel you let everyone down, and you made a fool of yourself and everything. But did you notice something, Charlie Brown?" "What's that?""The world didn't come to an end.
-Charles M. Schulz