6 dollars because if 2 is equal to 300 dollars just double it to get 6 dollars
Answer:

Step-by-step explanation:
Given that,
The pH of the solution = 12.24
We need to find the H⁺ concentration of the solution. We know that,
![pH=-log[H^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D)
Put pH = 12.24
So,
![12.24=-log[H^+]\\\\\[H^+]=4.83\times 10^{-6}](https://tex.z-dn.net/?f=12.24%3D-log%5BH%5E%2B%5D%5C%5C%5C%5C%5C%5BH%5E%2B%5D%3D4.83%5Ctimes%2010%5E%7B-6%7D)
So, the concentration of H+ is
.
18) 54.8 centimeters
19) 0.05 liters