Answer:
The answer is 3. Arrhenius acids form hydronium ions in water
Explanation:
From the notes my teacher gave me.
Hopefully this helps, have a nice day.
Also by any chance, do you go to Freedom High School?
222.5 g
I did it like this:
X/250= 89/100=
22250/100=
222.5
Upload the answer again please like the question
Answer: 
Explanation: The given chemical reaction is:

Equilibrium constant (Kc) in general is written as:
![K_c=\frac{[products]}{[reactants]}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5Bproducts%5D%7D%7B%5Breactants%5D%7D)
Note:- Coefficients are written as their powers
So, the Kc expression for the above reaction will be:
![K_c=\frac{[NO]^2[Br_2]}{[NOBr]^2}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BNO%5D%5E2%5BBr_2%5D%7D%7B%5BNOBr%5D%5E2%7D)
Equilibrium moles are given for all of them. Let's divide the moles by given liters to get the concentrations.
= 0.040 M
= 0.0658 M
= 0.0217 M
Plug in the values in the equilibrium expression to calculate Kc.

