What is the only type of mixture that has particles that dissolve and are transparent

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.

What is the value of keq for the reaction expressed in scientific notation

How do scientists think that gravity affected the formation of our solar system?