Which statement correctly describes a solution with a pH of 9?(1) It has a higher concentration of H3O+ than OH– and causes litmus to turn blue.
(2) It has a higher concentration of OH– than H3O+ and causes litmus to turn blue.
(3) It has a higher concentration of H3O+ than OH– and causes methyl orange to turn yellow.
(4) It has a higher concentration of OH– than H3O+ and causes methyl orange to turn red.
Answers
A solution with a pH of 9 will have a higher concentration of and will turn red litmus to blue.
What is pH
It is the degree of acidity or alkalinity of substances.
A pH of 7 is neutral, below 7 is acidic, and above 7 is alkaline or basic.
A base generally have as the only negative ions when ionized in aqueous solutions. Bases also turn red litmus to blue.
Thus, a solution with a pH of 9 will have a higher concentration of and will turn red litmus to blue.
More on pH can be found here: brainly.com/question/15289741
Answer: Option (2) is the correct answer.
Explanation:
It is known that when pH of a solution is less than 7 then the solution is acidic in nature and turns blue litmus into red. Whereas when pH of a solution is more than 7 then the solution is basic in nature and turns red litmus into blue.
Hydrogen ions can also be released in the form of hydronium ions ().
And, when a solution has pH 9 then it means the solution is basic in nature.
That is, there will be more number of hydroxide or ions as compared to hydrogen ions or
ions.
Thus, we can conclude that the statement it has a higher concentration of OH– than H3O+ and causes litmus to turn blue correctly describes a solution with a pH of 9.
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Answer:
The correct answer is the Tyndall effect. This is also known as the Tyndall scattering. It is the light scattering by the particles in a colloid or in a suspension. This phenomenon is used to determine size and density of particles in colloidal matter.
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Explanation:
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Answer:
(A.) three dimensional folded structure of the protein
Explanation:
The secondary structure of a protein is a regular structure built from interactions between neighboring amino acids as the polypeptide starts to fold or coil into its functional three-dimensional shape.
The two kinds of secondary structures arising from this polypeptide 'flexing' are either the α-helix and β-pleated structures, all of which are vital to globular and fibrous proteins.
Final answer:
The secondary structure of a protein is the initial folding of the amino acid chain into a corkscrew-like shape (alpha helix) or a zigzag folding pattern (beta-pleated sheet). This occurs due to hydrogen bonding between the peptide bonds.
Explanation:
The secondary structure of a protein refers to the sense in which the polypeptide chain (the linear assembly of amino acids) begins to fold. This folding occurs due to the formation of hydrogen bonds between the peptide bonds in the chain. The two most common types of secondary structures are alpha helix (corkscrew-like shape) and beta-pleated sheet (zigzag folding pattern). Therefore, the correct answer to your question is option d: the twisting of the amino acid chain into a corkscrew-like shape or into a zigzag folding pattern.
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The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.
Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas
The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.
b. Carbon, atomic number 6
c. Neon, atomic number 10
d. Fluorine, atomic number 9
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Answer:
Neon, atomic number 10, is stable.
Explanation:
Valencia electrons are the electrons found in the last electronic layer (called valence orbitals). These electrons are what determine the ability of the atom to form bonds. When an element joins another, it does so through its valence electrons.
The noble gases include the elements of group 18 of the periodic table. The noble gases are characterized by their very low chemical reactivity because they are very stable. This is because they have the full valence layer (complying with the octet rule, that is, they have 8 electrons at their last energy level, with the exception of helium that has 2 electrons), causing them to have a low tendency to capture or release electrons . That is why they are also called inert gases.
The Neon, whose atomic number is 10, belongs to the group of noble gases. So this element is stable.
Neon is the most stable because it has 8 valence electrons. when an element has full number of valence electrons, they become stable.