If the ph of a solution is decreased from 14 to 13, it means that?

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1