Which of the following compounds is always part of an aqueous solution

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

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

If a particle has z = 25 and 23 electrons, what is its charge?