Correct answer is 
.
Phosphoric acid is a polyprotic acid having 3 acidic hyrdogen therefore it will have 3 pka values.
The equations for the release of acidic hydrogen can be written as:
From the pka values we can judge the idea of pH as using Henderson-Hasselbalch Equation, we get the relation between pH and pka.
Using the following equation, relation of pH and pka is
![pH=pka+log\frac{[A^-]}{HA}](https://tex.z-dn.net/?f=pH%3Dpka%2Blog%5Cfrac%7B%5BA%5E-%5D%7D%7BHA%7D)
Using this equation, we can find that the equation having pka= 2. 14 is closest to the pH=3.2 so the ionic form in this equation will be dominant at the same pH.
Therefore at pH=3.2 the ionic form of 
is dominant.
47/3 which could be simplified to 15.6
Vacuoles are storage bubbles found in cells. They are found in both animal and plant cells but are much larger in plant cells. Vacuoles might store food or any variety of nutrients a cell might need to survive. They can even store waste products so the rest of the cell is protected from contamination.
Answer:
14mph
Explanation:
270 minutes = 4 hr and 1/2hr
63 miles = 63/4.5 = 14 miles per hour
Making the speed 14mph
Equation = h = 4.5
(4h x 4h ) + (1 x 311/100) = 60
= 4h x 4h +( 1 x 311/100) =60
= 16h^2 + (1 x 311/100) =60
= 256h + (1 x 311/100) =60
= 256h + 14 = 60
= 270h = 60
= h = 4.5
