What is the [h+] in a solution with poh of 0.253?

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 shape would a molecule with two bound groups and two lone pairs have?

How does the motion of particles in a gas change as the gas cools