"hey have you done the mastering chemistry for this week yet?  "no but i heard it's a real killer
a website created to make the lives of american college students a nightmare through the use of nazi-like grading on significant figures and rounding throughout 15+ pages of hell
""hey have you done the mastering chemistry for this week yet?  "no but i heard it's a real killer" What is the definition of "mastering chemistry"?