The main substances in air are n 2 (nitrogen), o 2 (oxygen), co 2 (carbon dioxide), h 2 o (water), and ar (argon). which of these substances are elements? which are compounds? which are molecules?

Chris has a thrombotic disorder which class of medications would his doctor prescribe to inhibit the thrombosis

Lori didn't want to learn the piano and thought her mom was wasting money on lessons. lori didn't like practicing and saw no future purpose for learning the piano since she wasn't going to grow up to be a pianist. what is lori expressing?

Is psychology a science? use evidence form the article to explain you answer.