Name the N-terminal and C-terminal residues for the following peptide sequence. Peptide sequence: EASY View Available Hint(s) Name the N-terminal and C-terminal residues for the following peptide sequence. Peptide sequence: EASY Aspartic acid is the N-terminal residue; tyrosine is the C-terminal residue. Glutamic acid is the N-terminal residue; tyrosine is the C-terminal residue. Tyrosine is the N-terminal residue; glutamic acid is the C-terminal residue. Glutamic acid is the N-terminal residue; tryptophan is the C-terminal residue

Answer:

C. The ml quantum number must have a positive value.

Explanation:

The single electron in hydrogen can be found in a ground state orbital of 1s having a magnetic quantum number ml = 0.

Similarly, this one electron can be excited to other higher energy levels such as 2p, 3p, 3d etc

The magnetic quantum numbers ml for higher np sub-levels of the hydrogen atom have magnetic quantum numbers; -1, 0 and 1.

The nd sub-levels have magnetic quantum numbers; -2, -1, 0, 1, 2. We can see from the foregoing that magnetic quantum number ml for hydrogen atom is not always positive.

Answer:

Explanation:

Its a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances  rise  high into the atmosphere in which they mix and react with water, oxygen, and other chemicals to form more acidic pollutants.

Answer:

Explanation:

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

The chemical formulas for the ions and compounds you listed:

Copper (II) ion: Cu²⁺

Bromide ion: Br⁻

Magnesium ion: Mg²⁺

Phosphide ion: P³⁻

Copper (I) Bromide: CuBr

Sulfur Dichloride: SCl₂

Barium Fluoride: BaF₂

Magnesium Phosphate: Mg₃(PO₄)₂

Lithium Permanganate: LiMnO₄

Strontium Sulfite: SrSO₃

Nitrogen Monoxide: NO

Diselenium Tetraoxide: Se₂O₄

Aluminum Sulfide: Al₂S₃

Tin (IV) Iodide: SnI₄

Beryllium Oxide: BeO

Potassium Hydroxide: KOH

Copper (II) ion: Cu²⁺

Copper (II) ion has a charge of 2+ and is represented by Cu²⁺. This means that copper has lost two electrons, resulting in a 2+ charge.

Bromide ion: Br⁻

The bromide ion has a charge of 1- and is represented by Br⁻. This means that bromine has gained one electron, resulting in a 1- charge.

Magnesium ion: Mg²⁺

The magnesium ion has a charge of 2+ and is represented by Mg²⁺. This means that magnesium has lost two electrons, resulting in a 2+ charge.

Phosphide ion: P³⁻

The phosphide ion has a charge of 3- and is represented by P³⁻. This means that phosphorus has gained three electrons, resulting in a 3- charge.

Copper (I) Bromide: CuBr

Copper (I) bromide is a compound formed by combining copper (I) ion (Cu⁺) and bromide ion (Br⁻). The charges of the ions balance each other, resulting in a neutral compound.

Sulfur Dichloride: SCl₂

Sulfur dichloride is a compound consisting of one sulfur atom (S) and two chlorine atoms (Cl). The subscript "2" indicates the presence of two chlorine atoms.

Barium Fluoride: BaF₂

Barium fluoride is a compound composed of one barium ion (Ba²⁺) and two fluoride ions (F⁻). The charges of the ions balance each other, resulting in a neutral compound.

Magnesium Phosphate: Mg₃(PO₄)₂

Magnesium phosphate is a compound consisting of one magnesium ion (Mg²⁺) and two phosphate ions (PO₄³⁻). The charges of the ions balance each other, resulting in a neutral compound. The subscript "3" indicates the presence of three magnesium ions, and the subscript "2" indicates the presence of two phosphate ions.

Lithium Permanganate: LiMnO₄

Lithium permanganate is a compound composed of one lithium ion (Li⁺) and one permanganate ion (MnO₄⁻). The charges of the ions balance each other, resulting in a neutral compound.

Strontium Sulfite: SrSO₃

Strontium sulfite is a compound consisting of one strontium ion (Sr²⁺) and one sulfite ion (SO₃²⁻). The charges of the ions balance each other, resulting in a neutral compound.

Nitrogen Monoxide: NO

Nitrogen monoxide is a compound composed of one nitrogen atom (N) and one oxygen atom (O). Since the compound does not contain ions, it is represented by its elemental symbols.

Diselenium Tetraoxide: Se₂O₄

Diselenium tetraoxide is a compound consisting of two selenium atoms (Se) and four oxygen atoms (O). The prefix "di-" indicates the presence of two selenium atoms.

Aluminum Sulfide: Al₂S₃

Aluminum sulfide is a compound composed of two aluminum ions (Al³⁺) and three sulfide ions (S²⁻). The charges of the ions balance each other, resulting in a neutral compound. The subscript "

2" indicates the presence of two aluminum ions, and the subscript "3" indicates the presence of three sulfide ions.

Tin (IV) Iodide: SnI₄

Tin (IV) iodide is a compound formed by combining tin (IV) ion (Sn⁴⁺) and iodide ion (I⁻). The charges of the ions balance each other, resulting in a neutral compound.

Beryllium Oxide: BeO

Beryllium oxide is a compound composed of one beryllium ion (Be²⁺) and one oxygen ion (O²⁻). The charges of the ions balance each other, resulting in a neutral compound.

Potassium Hydroxide: KOH

Potassium hydroxide is a compound consisting of one potassium ion (K⁺) and one hydroxide ion (OH⁻). The charges of the ions balance each other, resulting in a neutral compound.

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Answer:

13.672

Explanation:

2 moles of OH in Ba(OH)₂

0.235 M × 2 mol OH = 0.47 M OH

pOH = -log[OH-] ; pOH = -log[0.47 M OH] ; 0.328 = pOH (consider significant figures)

14 - pOH = pH because pH + pOH = 14

14 - 0.328 = 13.672 [there are three decimal places after the OH concentration, so there should be in the answer as well - 13.672]

2 moles of ZnO are produced if 1 mole of Zn and 2 moles of \(O_2\) is required.

A mole is defined as 6.02214076 × \(10^{23}\) of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Balanced equation:

\(2 Zn + O_2\) → \(2 ZnO\)

For 2 moles of Zinc, we need 1 mol of Oxygen to produce 2 moles of Zinc oxide

For 1 mole Zn, we need 2 mol \(O_2\) to produce 2 moles ZnO only.

Hence, 2 moles ZnO is produced.

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Answer: you will need to work out how many moles are in NH3, to get this you divide the mass by NH3's RMM (relative molecular formula) [14+(3x1)=17]

5.00/17=0.294 moles

so now that you've got the moles to get molecules you need to times the moles by avargado's constant 6.022x10^23

the rule is that one mole of compound containes 6.022x10^23 molecules

so now you times your moles of NH3 (0.294) by avargados constant

0.294 x 6.002x10^23 = 1.765x10^23

just to clarify thats 1.765 times ten to the power of 23

Explanation: hope this helps:)

Answer:you will need to work out how many moles are in NH3, to get this you divide the mass by NH3's RMM (relative molecular formula) [14+(3x1)=17]

5.00/17=0.294 moles

so now that you've got the moles to get molecules you need to times the moles by avargado's constant 6.022x10^23

the rule is that one mole of compound containes 6.022x10^23 molecules

so now you times your moles of NH3 (0.294) by avargados constant

0.294 x 6.002x10^23 = 1.765x10^23

just to clarify thats 1.765 times ten to the power of 23

or

it’s 1.77 x 10^23

Potential energy diagram for a combustion reaction:. CLICK ON IMAGE.

In a typical combustion reaction, the reactants (e.g. a fuel and an oxidizer) are initially at a relatively high potential energy. As the reaction proceeds, the potential energy of the system decreases, and the products (e.g. carbon dioxide and water vapor) are at a lower potential energy than the reactants. The difference in potential energy between the reactants and products corresponds to the heat released during the reaction.

The diagram shows the initial energy level of the reactants, the activation energy required to initiate the reaction, and the final energy level of the products. The activation energy is the minimum amount of energy required for the reaction to occur.

Once the reactants have absorbed enough energy to reach the activation energy threshold, the reaction proceeds spontaneously and releases energy as it progresses to the lower-energy products.

Note that the shape of the potential energy diagram can vary depending on the specific reaction and the reaction conditions. For example, some reactions may have more complex energy profiles with multiple intermediate steps or energy barriers.

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Answer:

The reaction involves two steps and occurs fastest with tertiary alkyl halides

Explanation:

To solve such this we must know the concept of nucleophilic substitution reaction. The reaction involves two steps and occurs fastest with tertiary alkyl halides. Therefore, the correct option is option A.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

The characteristics of SN1 mechanism:

SN1 reaction is a nucleophilic substitution reaction.

Leaving group, a nucleophile, electrophile and a solvent are present

Two types of enantiomers can be formed in the reaction depending on the preference of the nucleophile.

The first step is the slowest because a bond is being broken.

SN1 reaction involves two steps and occurs fastest with tertiary alkyl halides

Therefore, the correct option is option A.

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Answer:

Emerald is a compound made of Beryllium, Aluminium, Silicon and Oxygen with the formula, Be3Al2(SiO3)6

Explanation:

Answer:

A pure substance because its a compound

Explanation:

Answer:

Explanation:

1.1 we have to find mass of Na3PO4;

for that we have to Calculate the moles of Na3PO4 needed:

volume is 100mL = 0.1L

Molar concentration = Moles of solute / Volume of solution in L

0.1 mol/L = Moles of Na3PO4 / 0.1 L

Moles of Na3PO4 = 0.1 mol/L * 0.1 L

Moles of Na3PO4 = 0.01 mol

Now, Calculate the mass of Na3PO4 needed:

so, Mass = Moles of Na3PO4 * Molar mass of Na3PO4

Mass = 0.01 mol * 164 g/mol

Mass = 1.64 g of Na3PO4.

1.2 materials and glassware needed:

1.64 g Sodium phosphate (Na3PO4)

100 mL volumetric flask

weighing balance

Distilled water

Glass rod

Pipette and burette

The name of the compound from the structure that we can see in the question is;

4,4-dibromohex-2one

The International Union of Pure and Applied Chemistry (IUPAC) established a systematic set of guidelines for naming organic compounds.

Find the compound's longest continuous chain of carbon atoms. The compound's name is derived from this chain, which also acts as the compound's parent chain.

Assign a number to each carbon atom in the parent chain to give each carbon atom in the compound a special identification. The end that is closest to the functional group or substitutes is where the numbering begins.

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Answer:

Which of the following best describes the make up of Saturn's rings?(1 point) solid bands of sand and dust that formed from the start of the universe solid bands of sand and dust that formed from the start of the universe material from comets that have passed through Saturn's atmosphere material from comets that have passed through Saturn's atmosphere dust, rock, and ice particles that orbit due to Saturn's gravity dust, rock, and ice particles that orbit due to Saturn's gravity debris and rocks from other planets that orbit around Saturn

The make up of Saturn's ring are dust, rock, and ice particles that orbit due to Saturn's gravity"

Saturn is one of the 9 planets of the solar system. It is considered to be the second largest planet.

Saturn has seven large rings orbiting around it. These rings are believed to be pieces of comets, asteroids, or shattered moons that broke up before they reached the planet. And this shattered comets or asteroid are believed to be torn apart by Saturn's powerful gravity.

These comets or asteroids are made of billions of small chunks of ice and rocks which are covered or coated with other small materials such as dust particles.

Thus, the correct option that matches the above explanation is "dust, rock, and ice particles that orbit due to Saturn's gravity"

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The type of compound represented by the graph at right is a strong acid (option B).

An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.

An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.

According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.

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sodium hydroxide (NAOH) a.k.a causic soda commonly used in labs​.

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Answer: Sodium hydroxide (NaOH), also known as caustic soda or lye, is a highly versatile substance used in a variety of manufacturing processes.

Explanation: For Example: Sodium hydroxide is also the most common base used in chemical laboratories, being able to test for quite a number of cations (this is called Qualitative Inorganic Analysis), as well as to provide alkaline mediums for some reactions that need it, such as the Biuret test.

In an ecosystem, the  impact of soil Science to the development of Ghana's agriculture is that it provides suitable conditions for root germination and growth.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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​

We are Given:

22.5 grams of NaOH in 75 grams of H₂O

2NaOH + 2H₂O →  2Na(OH)₂ + H₂

from this equation, we can see that for 2 moles of both NaOH and H₂O, we get 2 Moles of Na(OH)₂

Calculating the number of moles of NaOH and H₂O provided:

Moles of NaOH:

molar mass of NaOH = 40 grams/mol

Given mass of NaOH = 22.5 grams

Number of moles of NaOH = Given mass / Molar mass

Number of moles of NaOH = 22.5 / 40

Number of moles of NaOH = 1.125 moles of NaOH

Moles of H₂O:

molar mass of H₂O = 18 grams / mol

given mass of H₂O = 75 grams

Number of moles of H₂O = Given mass / Molar mass

Number of moles of H₂O = 75 / 18 = 4.167 moles of H₂O

Number of Moles of NaOH and H₂O which will actually react:

from the equation, we know that the moles of NaOH and H₂O react in 1:1 ratio

So, we can say that one mole of NaOH reacts with one mole of H₂O

but we have much less NaOH than H₂O

So, only the moles equal to the number of moles of NaOH will react of either compound

1.125 moles of both NaOH and H₂O will react

Moles of Na(OH)₂ formed:

we know from the equation that the moles of NaOH and H₂O react to form  moles of Na(OH)₂ in the ratio 1:1:1

So, 1.125 moles of Na(OH)₂ will be formed

Percentage composition by mass:

amount of water present alongside the Na(OH)₂ formed:

we were given 4.167 moles of H₂O and only 1.125 moles of it was consumed in the reaction

so, 4.167 - 1.125 = 3 moles of H₂O will be present alongside the Na(OH)₂

3 moles of H₂O = 3 * 18 = 54 grams of H₂O will be present along the Na(OH)₂

Mass of Na(OH)₂ formed:

mass = number of moles * molar mass

mass = 1.125 * 41  = 46 grams of Na(OH)₂ will be formed

Total mass of the solution formed:

total mass = mass of H₂O + mass of Na(OH)₂

total mass = 54 + 46 = 100 grams

Percent composition by mass of Na(OH)₂:

Mass% of Na(OH)₂ = (Mass of Na(OH)₂ / Total mass) * 100

Mass% of Na(OH)₂ = 46 %

An electron in a molecule behaves wave-like according to a function called a molecular orbital. Utilizing quantum mechanics, the molecular orbital theory defines the electrical structure of molecules.

What would an example of equilibrium look like?

There are several examples of equilibrium, such as: an open book that is lying flat. a moving object that is moving steadily a chemical reaction takes place where the rates of both the forward and reverse reactions are identical.

What is straightforward equilibrium?

A system is at an equilibrium when all of its external forces are in balance. When a system is in equilibrium, nothing changes.

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Answer: Silver (I) fluoride molecule · AgF

Classification: Inorganic compound (Could be salt)

Ionic compound (Silver is a metal)

Valence of F (F must form an octet): 7

Valence of Ag: 11

Total valence electrons: 18

Molar mass: 126.87 g/mol

Explanation:

Answer:

Answer is shown on the paper :D

Explanation:

Remember to follow sig-figs.

The pH of the solution is 10.82.

To solve this problem, we need to determine the concentration of the hydronium ion (\(H_3O^+\)) in the solution. This can be done using the following steps:

Write the balanced chemical equation for the reaction between HBr and CH₃NH₂.

HBr + CH₃NH₂ → CH₃NH₃⁺ + Br⁻

Write the expression for the base dissociation constant (Kb) for CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

Calculate the concentration of hydroxide ions (OH⁻) in the solution using the Kb value and the concentration of CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

4.4 × 10⁻⁴ = x² / (0.400 M)

x = 6.63 × 10⁻³ M

[OH⁻] = 6.63 × 10⁻³ M

Calculate the concentration of \(H_3O^+\) using the equilibrium constant for the reaction between HBr and \(H_2O\).

\(HBr + H_2O = H_3O^+ + Br^-\)

\(Kw = [H_3O^+][OH^-] = 1.0 * 10^{-14}\\[H_3O^+] = Kw/[OH-] = 1.51 * 10^{-11}\)

Calculate the pH using the concentration of \(H_3O^+\).

\(pH = -log[H_3O^+]\\pH = -log(1.51 * 10^{-11})\)

pH = 10.82

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Answer:

1.25 g

Explanation:

Now we have to use the formula;

N/No = (1/2)^t/t1/2

N= mass of cesium-137 left after a time t (the unknown)

No= mass of cesium-137 present at the beginning = 5.0 g

t= time taken for 5.0 g of cesium-137 to decay =60 years

t1/2= half life of cesium-137= 30 years

Substituting values;

N/5= (1/2)^60/30

N/5= (1/2)^2

N/5= 1/4

4N= 5

N= 5/4

N= 1.25 g

Therefore, 1.25 g of cesium-137 will remain after 60 years.

The balanced equation for the dissolving of aluminum chloride into an aqueous solution with the dissociation of the ions is; AlCl3(s) → Al^3+ (aq) + 3 Cl^-(aq).

An equation is a representation of the change that occurs inside a reaction vessel. Usually, we use this tool to show on paper, a process that we can not see with or eyes.

The equation that shows the balanced equation for the dissolving of aluminum chloride into an aqueous solution with the dissociation of the ions is; AlCl3(s) → Al^3+ (aq) + 3 Cl^-(aq).

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Answer:

See figure 1

Explanation:

In this question, we have to remember that a poor electron carbon is a carbon in which we have a positive charge, a carbocation. Therefore we have to start with the production of the carbocation. First, a double bond from the benzene is moved to the carbon in the top to produce a new double bond generating a positive charge in a carbon with ortho position (electron-poor). Then we can move another double bond inside the ring to produce a positive charge in the para carbon. Finally, we can move the last double bond to produce again another positive charge in the second ortho carbon.

See figure 1.

I hope it helps!

The given statement is true. A skeleton equation shows the formulas of the compounds participating in a chemical reaction and their states of matter but not the ratio in which they react.

A skeleton equation defines the chemical formulas and physical states of the reactants and products, yet it does not account for the relative amounts of the reactants and products. Chemical reactions result simply from the rearrangement of atoms, thus the law of conservation of mass have to be observed.

Skeleton Equations are the equations where there is only chemical formula of reactants and products but no state mentioned and no balancing of atoms on either side of the equation done. For example: Mg + O2 → MgO, it is a skeleton equation. In the equation, the only thing mentioned is the chemical formula of reactant.

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The binding energy per nucleon for the ¹⁹F nucleon is equal to 7.786 MeV/nucleon.

Binding energy can be defined as the minimum quantity of energy that is required to remove the particle from the system. Nuclear binding energy can be described as the energy required to dismantle a nucleus of an atom into free neutrons and protons.

The binding energy will be determined from the mass defect. Mass defect is calculated from the difference between the mass observed and the expected combined mass.

Given the mass of the ¹⁹F = 18.9984 a.m.u.

The mass defect for the ¹⁹F can be calculated as:

Δm = \((M _n +M_p) - M_F\)

\(\triangle m =( 9\times 1.0078 + 10 \times 1.0087 )- 18.9984\)

\(\triangle m =0.1588 \;a.m.u.\)

The binding energy for the fluorine can be calculated as:

E = Δmc²

E = 0.1588 × 931.5

E = 147.92 MeV

The binding energy per nucleon of ¹⁹F can be calculated as:

B.E.N. = 147.92/18.9984 = 7.786 MeV per nucleon

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The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.

The combined gas law equation is:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.

Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.

To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.

Now we can solve for T₂:

(T₂ * V₁) / T₁ = V₂

T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL

Simplifying the equation, we find:

T₂ ≈ 143.27 K

Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.

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