3.How does freezing and thawing break rocks apart? A. Ice covers rock and prevents weathering.
B. Water expands when it freezes, pushing rocks apart.
C. When ice thaws it pushes rocks apart.
D. Water filters through sand.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules