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ook so this year I started adult highschool and to finish my last class I have a packet of papers with a test at the end. and of course theres two questions that the packet only touched on and doesnt really say what the answer is and I cant find them anywhere. im hoping sombody on here might know.

True or False: Air contains oxygen and nitrogen.
I know air contains oxygen.. but im not sure how to answer it because I dk if theres a small amount of nitrogen in the air or not


Urine is a liquid that contains water and ---

thanks for your help!