What is the most-correct statement about the polypeptide with the primary sequence atavistic?

The ionic radius is the distance between the nucleus of the ion up to the electron cloud that overlays the ion.  

The ionic radius is the distance between the nucleus of the ion up to the electron cloud that overlays the ion.  We know that for a metal, the ionic radii  decreases as the  magnitude of charge on the ion increases  while in the case of the negative ion, the ionic radii increases as the magnitude of charge on the ion increases.

Let us now look at the ions as shown;

a)  I^->I> I^+ - This is because the negative ion leads to an expansion of the electron cloud which decreases in the atom and the positive ion.

b) Ca²+ > Mg2+ > Be²+ - Ionic radius increases down the group as more shells are added.

c)  Fe>Fe²+ > Fe³+ - This is because, for a metal, the ionic radii  decreases as the magnitude of charge on the ion increases

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Answer:

235.7 gm

Explanation:

58.933 gm/mole  *  2.408 * 10^24 atoms / (6.022 x 10^23  atoms/mole)

         = 235.7 gm

The first location of chemical and mechanical digestion is the stomach. This statement is false.

Digestion is the breaking down of large insoluble food molecules into smaller water-soluble food molecules so that they can be absorbed into the aqueous plasma. In certain organisms, these small substances are absorbed from the small intestine into the bloodstream. Digestion is important for breaking down food into nutrients that the body uses for energy, growth, and cell repair that it needs to survive.

The digestive system has many forms. A basic distinction is made between internal and external digestion. External digestion evolved early in evolutionary history, and most fungi still rely on it. During this process, enzymes are secreted into the organism's environment, where organic substances are decomposed and some of the products diffuse back into the organism. Animals have a tube (alimentary canal) where internal digestion takes place. This is more efficient as more decomposition products can be trapped and the internal chemical environment can be more effectively controlled.

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When we half the quantities of reactants and products in a reaction, the value of the equilibrium constant remains the same.

Formula:

K = [P]/[R]

Here, [P]  is the concentration of the product.

[R] is the concentration of reactant.

[R]2= 1/2×[R]1 and [P]2 = 1/2×[P]1

K1 =  [P1] / [R1]

K2 = [P2] / [R2]

K2/K1 = [P2] / [R2]  ÷ [P1] / [R1]

K2/K1 = [P2] / [R2] x [R1] / [P1]

K2/K1= 1/2×[P]1 ÷ 1/2 [R1] x [R1] / [P1]

K2=K1 = 1/2  ÷ 1/2

K2/K1 =  1/2 x 2/1

K2 / K1 = 1

K2 = K1

Thus, the value of the equilibrium constant remains the same.

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The frequency of a radio wave with an energy of 8.3 x 10-24 J is 1.257 ×10¹⁰ Hz

For the calculation of energy, we know that

E = h[tex]v[/tex]

where. E is energy

h is planks constant

and [tex]v[/tex] is the frequency.

thus, E = 8.3× 10⁻²⁴ J

and h = 6.6 × 10⁻³⁴ Js.

Now, putting values in the formula we get,

8.3× 10 ⁻²⁴ = 6.6×10 ⁻³⁴ × [tex]v[/tex]

thus, [tex]v[/tex] = 8.3 × 10⁻²⁴ / 6.6 ×10⁻³⁴

[tex]v[/tex] = 1.257 ×10¹⁰ Hz

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Answer:

This means it is a solid, so a formula is used to measure it. The formula depends on its shape.

You would use a ruler to measure it.

Explanation:

You would use a ruler to measure it:

Ex. Shoebox

Rectangle Volume = length x width x height

V= l • w • h

Ex. Rubix Cube

Cube Volume = length x width x height

since all sides are equal, it is:

V= s3

All of the amino acids could form a hydrogen bond with another amino acid in the chain to stabilize the secondary structure of a b-pleated sheet.

Protein is composed of amino acid linked with peptide bond.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

In a beta-pleated sheet, hydrogen bonds are formed between carbonyl and amino groups of backbone (see the picture below).

Usually, amino acid proline is found in the edge strands in beta-sheets. Beta-branched amino acids valine, threonine and isoleucine and aromatic amino acid residues tryptophan, tyrosine and phenylalanine are found middle of beta-sheets.

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Explanation:

a color change occurs cause when it Colides it mixes in with the other color and changes it completely

The correct answer is option C . Clue that a chemical reaction has taken place is not that the reactant is smaller.

Let's break down each of the options to understand why option c is incorrect:

a. A color change occurs: When a chemical reaction occurs, there may be a change in color. For example, when iron rusts, it changes from a metallic silver color to a reddish-brown color.

b. A flame occurs: Some chemical reactions produce heat, and if the reaction is exothermic enough, it can produce a flame. For instance, when wood burns, a flame is produced as a result of a chemical reaction between the wood and oxygen.

c. The reactant is smaller: This statement is incorrect. A chemical reaction does not necessarily mean that the reactant becomes smaller. Reactants can combine to form a larger product or they can rearrange to form different molecules without changing their size.

d. Bubbles form: When a gas is produced during a chemical reaction, bubbles may form. For example, when vinegar (acetic acid) reacts with baking soda (sodium bicarbonate), carbon dioxide gas is released, causing bubbles to form.

e. A solid forms: Some chemical reactions involve the formation of a solid. For instance, when a metal reacts with a non-metal, such as sodium reacting with chlorine to form sodium chloride, a solid salt is formed.

Thus, clues that a chemical reaction has taken place include a color change (option a), a flame (option b), bubbles forming (option d), and a solid forming (option e). The incorrect option is c, which states that the reactant becomes smaller.

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6 vibrational degrees of freedom in dichloromethane (ch2cl2)

No of independent way in which a molecule or an atom can exhibit motion is called degree of freedom Here, dicloromethane is a non linear molecule that's why degree of freedom for non linear molecule is 3N-6. here N= no of atom involved in that molecule so in dicloromethane 3N-6=3×4-6=12-6=6

Therefore in dichloromethane 6 vibrational degree of freedom

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The density of a sample  thought to be pure lead occupies a volume of 15.0 mL and has a mass of 160.0 = 10.7 g/mol.

Density = [tex]\frac{mass}{volume }[/tex]

         = [tex]\frac{160}{15}[/tex]

density    = 10.7 g/mol

Density is termed because the ratio of mass of the object to the volume of the object. Different substances have several densities. The mathematical expression for density is as follows:

Density=Mass/Volume.

The mass of a substance is expressed in kilograms and  therefore the volume is expressed in liter.

Volume is the  total amount of space occupied by a substance, whereas  mass is the amount of matter it contains in it . The amount of mass per unit of volume is a sample density.

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Between formic acid, HCO2H, and dichloroacetic acid, Cl2CHCO2H, dichloroacetic acid, Cl2CHCO2H is the stronger acid based on their pka.

Acids and bases can be classified into two: weak and strong.

A strong acid or a strong base completely dissociates in a solution while  weak acid or a weak base dissociates only partially.

Based on its dissociation constant, Ka, the larger the value of the Ka of an acid, the stronger it is.

On the other hand, the smaller the value of the logarithmic constant, pKa = - log Ka, the stronger the acid is.

Between formic acid, HCO2H, and dichloroacetic acid, Cl2CHCO2H, which has a pKa of 3.8 and 1.3, respectively, dichloroacetic acid, Cl2CHCO2H has smaller value of pKa.

Hence, dichloroacetic acid, Cl2CHCO2H is the stronger acid.

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A stoichiometric mixture is a mixture of fuel and oxygen for which the masses of these two components are exactly those needed for complete combustion.

A stoichiometric mixture is a balanced mixture of fuel and oxygen.

The fuel and the oxygen react completely without the excesses of either.

The opposite of a stoichiometric mixture is called feeding an excess, when minimum one reactant is an excess amount.

Balanced chemical equation for reaction of combustion one type of a fuel: C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O

Stoichiometric mixture for this example is when fuel (C₈H₁₈) and oxygen(O₂) react in proportion 1 : 12.5.

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Mass of kool aid required  is 3.42g to make 0.2 mole solution 1 liter

by the formula of molarity we know that molarity = mole/liter

We can enter those values into the equation to determine the necessary number of moles because we know that we want a 0.1Mole solution in 100 mL so by substituting the values 1/ 0.1= 0.01 moles.

We now know that there are 0.01 moles of Kool-Aid powder. Additionally, we are aware that this powder's chemical composition is c12 h22o11

By multiplying the atomic weight from the periodic table by the quantity of atoms in the compound, we may determine the molar weight of this powder. Let's calculate the powder's molar weight:

Find the carbon atomic weight

12 X 12 =144g

Then we have 22 H's, each having an atomic weight of 1.008g

22 X 11= 22g

And finally there are 11 O's, each with an atomic weight of 16g

16 X11 =176g

by adding the atomic weight of atoms 342.19g

now by finding the grams of kool compound  342.19 X 0.01mol = 3.42g.

now we know that we need 0.01 moles of the powder, and we need 3.42g of the powder to make the desired solution

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Decane has the highest viscosity at 25°C.

The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.

Viscosity depends on intermolecular interactions and molar mass of the substance.

Ethane, pentane and decane are acyclic saturated hydrocarbons (alkanes).

At 25°C, ethane (C₂H₆) is in gaseous state of matter. Its molecular mass is the smallest of these three molecules, so it has lowest viscosity.

Decane (C₁₀H₂₂) and pentane (C₅H₁₂) are liquids at 25°C, but decane has greater molecular mass, therefore the highest viscosity.

M(C₂H₆) = 30 g/mol; molar mass of an ethene

M(C₁₀H₂₂) = 72 g/mol; molar mass of pentane

M(C₅H₁₂) = 144 g/mol; molar mass of decane

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Answer:

nitrogen

(He) 2s2 2p3

aluminium

(Ne) 3s2 3p1

chlorine

(Ne) 3s2 3p5

The number of NMR signals represents the number of different types of protons in a molecule.

What is molecule?

A molecule is defined as a collection of two or more atoms held together by the attractive forces known as chemical bonds; depending on the context, the term may or may not include ions that fit this criteria.

The spectrum has five signals which indicate five types of different protons.

What does a type of proton mean?

Here type of proton means protons are grouped in types based on their environments.

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The molar mass of element X is 75 g/mol.

m(X₄O₆) = 59.4 g; mass of the compound

m(O) = 14.4 g; mass of oxygen in the compound

n(O) = 14.4 g ÷ 16 g/mol

n(O) = 0.9 mol; amount of oxygen in compound

m(X) = m(X₄O₆) - m(O)

m(X) = 59.4 g - 14.4 g

m(X) = 45.0 g; mass of element X

Ratio of the elements in the compound: n(X) : n(O) = 4 : 6.

n(X) = 0.9 mol × 4 / 6

n(X) = 0.6 mol; amount of element X in the compound

M(X) = m(X) ÷ n(X)

M(X) = 45.0 g ÷ 0.6 mol

M(X) = 75 g/mol; molar mass of element X

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The polarity arrow should point away from the central sulphur atom.

A polarity arrow indicates the direction of the atom with the greater electronegativity.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

An electron configuration of sulfur atom: ₁₆S 1s²2s²2p⁶3s²3p⁴

An electron configuration of chlorine atom: ₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵

In the molecule SCl₂, a chlorine (λ=3) is more polar than a sulfur (λ=1.8).

An arrow points from sulfur (S) toward chlorine (Cl), since it has a greater electronegativity than sulphur (see the picture below).

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On calculating using conversions, John can select either the package of wood with (a) 3 pieces of 2000mm each or the one with (d) 6 pieces of 100cm each.

On conversion of units from mm and cm to m:

1m = 100cm

1m = 1000mm

Therefore,

Since John requires 6m of wood to build a diving board, using unit conversions:

3 pieces of 2000mm each:

2000mm = 2m = 2m x 3 = 6m

4 pieces of 1.5 cm each:

1.5cm = 0.015m x 4 = 0.06m

6 pieces of 100 mm each:

100mm = 0.1m x 6 = 0.6m

6 pieces of 100 cm each:

100cm = 1m x 6 = 6m

8 pieces of 200 mm each:

200mm = 0.2m x 8 = 1.6m

Result:

The package with 3 pieces wood of 2000mm each equals to 6m of wood.

Similarly, the package with 6 pieces wood of 100cm each equals to 6m of wood.

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In the mass spectrum of pentane, the presence of a peak with an m/z = 29 most likely is due to the loss of butyl radical from the molecule.

A spectrum (spectra or spectra) is a state that is not confined to a particular set of values ​​and can vary seamlessly on a continuum. The term was first used scientifically in optics to describe the rainbow colors of visible light after passing through a prism.

The Spectrum of Life in the Hall of Biodiversity is an evolutionary journey through the incredible diversity of life on Earth. The 1,500 specimens represent a wide range of bacteria, fungi, plants and animals, from the smallest microbes to giants of land and water. A spectrum is defined as the characteristic wavelengths of electromagnetic radiation (or parts thereof) emitted or absorbed by an object or substance, atoms or molecules. Examples of spectra include the rainbow, the colors of the sun's emission, and infrared absorption wavelengths of molecules.

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The rate of effusion rates of two

The rate of effusion rates of two different

gases are

(8) Rate of effusion of gas (T2) Rate of effusion of gan

molar mass 2 of gas molay mas 1 of gas

71/2

molar mass № 32

2 = molar mass 32

the molar mass of gas 2 128

So, the molar mass of gas = 128

approximately to molar mass

that is

equal

to

of Xenon noble

·gas.

So, Xenon noble Igas has an effusion rate of approximately half the rate of effusion for 02.

Heart failure is the most common cause. Exudate is caused by vascular or lymphatic obstruction, inflammation, infection, lung injury, and tumors. There are two types of swelling. Edema - swelling that occurs primarily in the soft tissues of the body and exudate - swelling or fluid in the common spaces. Edema and exudate are the results of changes in intracellular and extracellular fluid levels.

The cause of knee effusion determines care and treatment. When the cause of swollen joints is treated, the swelling often goes away. However, not all causes of knee fluid retention can be cured.

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Answer:

THEY HAVE DIFFERENT VOLUMES

Answer:

They have different volumes

They have different masses

Explanation:

Answer:

Metals tend to be hard, metallic-looking solids, with high electrical and thermal conductivity values and high melting and boiling points. Nonmetals tend to be softer, often colorful elements. They may be solids, liquids, or gases.

Answer: Metals are hard and have high melting and high boiling points and high electrical and thermal conductivity values and nonmetals are softer and are substances like solids,liquids,or gases.

The atomic number and mass number corresponds to the number of electrons and protons in a specific element, while the atomic number and mass number corresponds to the number of nucleons(protons and neutrons) in a specific element.

What is atomic number and mass number?

The number of protons in the nucleus of each element's atoms, represented by the symbol Z, is the element's atomic number. The sum of the protons and neutrons in an element's nucleus is known as the mass number (A).

Thus, atomic no. is the count of electrons or protons in an element whereas, atomic mass or weight refers to the no. of nucleons that is the sum of protons and neutrons in the nucleus of the element.

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When a substance moves down its concentration gradient, and energy is used to move another substance up its concentration gradient in the same direction is antiport secondary active transport

The primary active transport establishes the Na+ or H+ gradient. So to move substances against their concentration gradient, secondary transport uses energy derived from the hydrolysis of Adenosine triphosphate (ATP).

Secondary active transport is of two types - symport and antiport. When two or more substances move in the opposite direction using energy, it is termed an antiport. In this, one substance move inside, and another substance moves out of the cell. When two or more substance move in the same direction using energy is called symport. In this, either they are moving inside or out of the cell but move in the same direction.

Therefore, when a substance moves down its concentration gradient, and energy is used to move another substance up its concentration gradient in the same direction is antiport secondary active transport.

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Li₂SO₄+2H₂O is the result of the balanced chemical reaction, which is 2LiOH+H₂SO₄.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.

Consequently, the balanced chemical equation is; For a balanced chemical reaction, the number of atoms of a given element on the left hand side should match the number of atoms of that element on the right hand side.

2LiOH+H₂SO₄ → Li₂SO₄+2H₂O

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The object would not float but sink in water.

The term density refers to the ratio of the mass to the volume of a body. Now that we know that the density of water is 1 g/cm^3. A substance that would float in water must have a lower density than that of water.

Thus;

Mass of the object = 569 kg or 569000 g

Volume of the object = 74.0 cm x 55.0 cm x 35.0 cm = 142450cm^3

Density of the object = mass/ volume = 569000 g/142450cm^3

=  3.99 g/cm^3

Hence, the object would not float but sink in water.

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Scattering occurs when particles or large gas molecules present in the atmosphere interact with and cause the electromagnetic radiation to be redirected from its original path. How much scattering takes place depends on several factors including the wavelength of the radiation, the abundance of particles or gases, and the distance the radiation travels through the atmosphere. There are three (3) types of scattering which take place.

Scattering is a term used in physics to describe a broad vary of physical processes where moving particles or radiation of some form, such as light or sound, are compelled to deviate from a straight trajectory with the aid of localized non-uniformities (including particles and radiation) in the medium thru which they pass by.

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The concentration of sodium is high outside the cell (extracellular fluid) and the concentration of potassium is high inside the cell (cytoplasm).

Potassium is important for keeping the body hydrated and with sodium support cellular function (sodium-potassium (Na⁺/K⁺) pump).

The sodium-potassium pump releases three Na+ ions, while in the same time two K+ ions exit the cell. For this process one molecule of ATP is consumed.

The sodium and potassium cations move against the concentration gradients.

The sodium-potassium pump keeps a higher concentration of sodium extracellularly and a higher level of potassium intracellularly.

It is very important for many physiological processes in organism.

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