What is 2AI(s) + FeO3(s) = Ai2O3(s) + 2Fe(s)

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Which best describes how johannes kepler developed his laws of planetary motion

Asolid that forms and separates from a liquid mixture is called