Which two elements are ions?

a) Π and Ψ
b) Φ and Ψ
c) Σ and Ω
d) Ψ and Ω

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

Pls i will do pls imma diewhat forms white light? (4 points)a. combination of all wavelengths of ultraviolet light b. combination of all wavelengths of visible lightc. absorption of electromagnetic waves d. absorption of infrared rays