Isotope- variation of an element
Sixteen- atomic number of oxygen
Answer:
<h2>None</h2>
Explanation:
In the given sequence there is 9 amino acid in which 2 are positively charged amino acid and 7 are neutral amino acid at physiological pH . In each amino amino acid two oppositely charged amino and carboxyl group is present ,where amino is positively charged and proton acceptor and carboxyl is negatively charged and proton donor at physiological pH . pH below neutral cause addition of proton in amino group and makes amino acid positively charged , while pH above neutral cause addition of hydroxide ion in carboxylic group and makes amino acid negatively charged . At pH-4 , all amino acid in the given sequence become positively charge due to addition of proton in the solution ,these protons in the solution binds to amino acid sequence, hence there is no negative charged amino acid in the sequence .
The approximate degree of dissociation of a 0.35 M solution of lactic acid is 4,87%
<h3>What is degree of dissociation?</h3>
The degree of dissociation is the quantity used to express the strength of a base, that is, its ability to conduct electric current, which depends on the amount of ions released in the dissociation.
The degree of dissociation (α) is another way of determining the strength of a base. It indicates the fatty acids that were released from a base when it dissociates in water.
With that being said, C stands for concentration and α is the the degree of dissociation.
Latic Acid can be written as C3H6O3
![Ka = \frac{[H^{+}] [CH3CH(OH)CO2^{-}] }{CH#CH(OH)CO2H} = \frac{C^{2} \alpha^{2} }{C(1-\alpha )} = \frac{C\alpha ^{2} }{(1-\alpha )}](https://tex.z-dn.net/?f=Ka%20%3D%20%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%20%5BCH3CH%28OH%29CO2%5E%7B-%7D%5D%20%20%7D%7BCH%23CH%28OH%29CO2H%7D%20%3D%20%5Cfrac%7BC%5E%7B2%7D%20%5Calpha%5E%7B2%7D%20%20%7D%7BC%281-%5Calpha%20%29%7D%20%3D%20%5Cfrac%7BC%5Calpha%20%5E%7B2%7D%20%7D%7B%281-%5Calpha%20%29%7D)
As α is too small (1-α) can be neglected.
![Ka = C\alpha ^{2} \\\\\\alpha = \sqrt[]{\frac{Ka}{C} }](https://tex.z-dn.net/?f=Ka%20%3D%20C%5Calpha%20%5E%7B2%7D%20%20%5C%5C%5C%5C%5C%5Calpha%20%20%20%20%3D%20%5Csqrt%5B%5D%7B%5Cfrac%7BKa%7D%7BC%7D%20%7D)
In this case, is possible to see that approximate degree of dissociation of a 0.35 M solution of lactic acid is 4,87%
See more about pKa at: brainly.com/question/14924722
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Answer: Atoms contain tiny, negatively charged electrons
Explanation: Thomson's experiments with cathode ray tubes helped him to discover the electron (which Dalton did not know about). Dalton thought that atoms were indivisible particles, and Thomson's discovery of the electron proved the existence of subatomic particles.
<span>2H2 + O2 mc015-1.jpg 2H2O
</span><span>26.70 moles</span>
