An example is the formation of ATP, which is an endergonic process and is coupled to the dissipation of a proton gradient.
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Which is more water soluble hexanoic acid or sodium hexanoate?
Hexanoic acid [CH 3(CH 2) 4COOH] is barely soluble in water (about 1.0 g/100 g of water). Palmitic acid [CH 3(CH 2) 14COOH], with its large nonpolar hydrocarbon component, is essentially insoluble in water. The carboxylic acids generally are soluble in such organic solvents as ethanol, toluene, and diethyl ether.
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How many valence electrons must a lithium atom lose to obtain a complete valence shell?A. one B. two C. three D. four
A lithium atom must lose one valence electron to achieve a full valence shell, resulting in a positively charged lithium cation (Lit) with a noble gas configuration similar to helium.
To achieve a full valence shell, a lithium atom must lose one electron. Lithium has an atomic number of 3, which means it has three electrons: two in the first shell and one in the second shell. Since the first shell (1s) is already full with two electrons, lithium has a single electron in the 2s subshell of the second shell. This single electron is the valence electron.
According to the Lewis diagram, lithium (Li) has only one valence electron in its second shell. By transferring this lone electron to another atom, lithium's electron configuration will resemble that of helium (He), with two electrons in its first shell, thus achieving a stable noble gas configuration. This transfer results in the formation of a lithium cation, denoted as Lit, with a charge of 1+.
It is important to note that when lithium becomes a cation, it does not necessarily mean it has a complete valence shell in terms of helium or neon. Instead, it has achieved stability by having a full inner shell, which mimics the noble gas configuration of helium.
The titration of an acid (H2A) with LiOH solution generates the following titration curve. What are the main components (more than half of the initial amount of H2A, besides H2O) at equivalence point 1 (EP1) and equivalence point 2 (EP2)? Main Components at EP1 Main Components at EP2 A H2A and OH− A2− and OH− B HA− and Li+ A2− and Li+ C HA− and OH− HA− and Li+ D H2A and Li+ HA− and OH−
The main components (more than half of the initial amount of H2A, besides H2O) at equivalence point 1 and 2 (EP1), (EP2) is HA⁻ and Li⁺ A²⁻ and Li⁺.
What is the Titration curve?
Titration of acid H₂A with LiOH solution.
At first equivalent points are:
H₂A + LiOH → HA⁻ + Li⁺ + H₂O
The Main component at (EP1) => HA⁻ and Li⁺
At second equivalence point are:
HA⁻ + LiOH → A²⁻ + Li⁺ + H₂O
Main component at (EP2) => A²⁻ and Li⁺
Therefore, the correct option is B which is HA− and Li+ A2− and Li+
A. A cold front is moving to the north and east. B. A cold front is moving to the south and west. C. A warm front is moving to the north and east. D. A warm front is moving to the south and west.
I think the answers to this is d
Answer: It's D. A warm front is moving to the south and west.
Explanation: I got it right on the test
Use the following structures of amino acids to answer the questions below. Note that the difference in the structures (the side chains) is highlighted by gray shading.
A student performed chromatography of the four amino acids and theresults were shown in the chromatogram below. If an anion exchangecolumn (column is positively charged) was used in a neutral buffer,assign each amino acid to the corresponding peak in the chromatogram.
In a positively charged column, Asparate will travel the farthest followed by Threonine, Leucine and Lysine.