1.Which is the lowest level of organization for the system in a human
1 answer:
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Hello!
To solve this problem we'll use the Henderson-Hasselbach equation, but first we need the vale for the pKa of Benzoic acid, which is pKa= -log(Ka)=4,19
Now, we apply the equation as follows:
![pH=pKa + log ( \frac{[C_6H_5COONa]}{[C_6H_5COOH]} )=4,19+log( \frac{0,15M}{0,25M} )=3,97](https://tex.z-dn.net/?f=pH%3DpKa%20%2B%20log%20%28%20%5Cfrac%7B%5BC_6H_5COONa%5D%7D%7B%5BC_6H_5COOH%5D%7D%20%29%3D4%2C19%2Blog%28%20%5Cfrac%7B0%2C15M%7D%7B0%2C25M%7D%20%29%3D3%2C97%20)
So, the pH of this solution of Sodium Benzoate and Benzoic Acid is 3,97
Have a nice day!
To solve this problem we'll use the Henderson-Hasselbach equation, but first we need the vale for the pKa of Benzoic acid, which is pKa= -log(Ka)=4,19
Now, we apply the equation as follows:
So, the pH of this solution of Sodium Benzoate and Benzoic Acid is 3,97
Have a nice day!
Answer:
D.
Explanation:
Your unbalanced nuclear equation is
It is convenient to replace the question mark by an atomic symbol, , where <em>x</em> = the atomic number, <em>y</em> = the mass number, and <em>Z</em> = the symbol of the element .
Then your equation becomes
The main point to remember in balancing nuclear equations is that the sums of the superscripts and the subscripts must be the same on each side of the equation.
Then
55 = <em>x</em> - 1, so <em>x</em> = 55 + 1 = 56
135 = <em>y</em> + 0, so <em>y</em> = 135
Element 56 is barium, so the nuclear equation becomes