Infrared radiation if i’m correct
Answer:
I believe it would be 30, 100, and 1. You count them, and they're significant figures. The decimals are an estimate and cannot be measure exactly. That is what I've learned, not sure what you're learning but hopefully it helps...
Explanation:
Basic explanation is when you count, that's an exact count. You're not estimating. That's real. But for measuring something, you wouldn't have a precise answer because it could go on forever (like Pi)... this is just what i'm assuming.
Answer:
pH
OH- concentration 28.84
Explanation:
KOH dissociates into K+ and OH-. The ratio of K+ and OH- ion is 1:1
In any aqueous solution, the H3O+ and OH - must satisfy the following condition -
![[ H_3O^+] [OH^-] = k_w](https://tex.z-dn.net/?f=%5B%20H_3O%5E%2B%5D%20%5BOH%5E-%5D%20%3D%20k_w)
![[ H_3O^+] = \frac{k_w}{ [OH^-]}](https://tex.z-dn.net/?f=%5B%20H_3O%5E%2B%5D%20%3D%20%5Cfrac%7Bk_w%7D%7B%20%5BOH%5E-%5D%7D)
![[H_3O^+] = \frac{1 * 10^{-14}}{3.5 *10^{-2}[H_3O^+] = 2.857 * 10^{-13}](https://tex.z-dn.net/?f=%5BH_3O%5E%2B%5D%20%20%3D%20%5Cfrac%7B1%20%2A%2010%5E%7B-14%7D%7D%7B3.5%20%2A10%5E%7B-2%7D%5BH_3O%5E%2B%5D%20%20%3D%202.857%20%2A%2010%5E%7B-13%7D)
M
pH =
![- log [ H_3O^+]\\- log [2.857 * 10^{-13}]](https://tex.z-dn.net/?f=-%20log%20%5B%20H_3O%5E%2B%5D%5C%5C-%20log%20%5B2.857%20%2A%2010%5E%7B-13%7D%5D)
pH
![= - [-12.54]\\= 12.54](https://tex.z-dn.net/?f=%3D%20-%20%5B-12.54%5D%5C%5C%3D%2012.54)
pOH 
pH
pOH
OH concentration 
OH- concentration 28.84
