How many grams of potassium hydroxide does it take to dissolve in 1.14L to obtain a pH = 12.1

V1t2 = v2t1 is an expression of who’s law

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

In a reduction half-reaction, which amount is shown