which of the standard 20 amino acids is technically not an amino acid?

Answer: 1.22 litres

Explanation: in STP conditions amount of substance n= V/Vm

Vm is molar volume of gas, 22.41 litres/ mole.

Volume V = n·Vm= 0.068 mol·22.41 l / mol= 1.52388 litres

Newton's laws of motion are stated and explained below:

First law - an object remains in its state of motion in a straight line unless acted upon by an external force. This explains why moving objects are reluctant to stop and objects are rest are reluctant to move.

Second law - the change in the momentum of a body is directly proportional to the applied force and takes place in the direction of the applied force. This explains why acceleration increases with force.

Third law - action and reaction are equal and opposite.

This means that every force has a balancing force acting in the opposite direction

Newton's laws of motion are the laws that describe the observed phenomena of objects in motion.

The laws of motion are useful in determining the various features of motion in a straight line such as velocity, acceleration, impulse, and momentum.

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The correct kb of c6h5nh2 is  "9.2 x 10^-5" The correct answer is option (b).

To find the Kb of aniline, we need to first find the pOH of the solution using the pH given.

pH + pOH = 14

pOH = 14 - 8.66 = 5.34

Now, we can use the equation for Kb:

Kb = Kw / Ka

where Kw is the ion product constant of water (1.0 x 10^-14) and Ka is the acid dissociation constant of the conjugate acid of the base.

In this case, the conjugate acid is C6H5NH3+, which has a Kb given by the equation:

C6H5NH3+(aq) + H2O(l) → C6H5NH2(aq) + H3O+(aq)

Ka = [C6H5NH2][H3O+] / [C6H5NH3+]

We can assume that the concentration of [H3O+] is negligible compared to [OH-], so we can simplify the equation to:

Ka = [C6H5NH2][OH-] / [C6H5NH3+]

Since we know the concentration of aniline is 0.050 M, we can substitute:

Ka = x^2 / (0.050 - x)

where x is the concentration of [OH-].

Using the value of pOH, we can find the concentration of [OH-]:

pOH = -log[OH-]

5.34 = -log[OH-]

[OH-] = 2.11 x 10^-6

Substituting this value into the equation for Ka:

Ka = (2.11 x 10^-6)^2 / (0.050 - 2.11 x 10^-6)

Ka = 1.47 x 10^-10

Finally, we can use the equation for Kb:

Kb = Kw / Ka

Kb = 1.0 x 10^-14 / 1.47 x 10^-10

Kb = 6.8 x 10^-5

Therefore, the correct answer is option b).

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The Kb of C6H5NH2 is 4.2 x 10^-10. This can be calculated by using the formula Kb = Kw/Ka where Kw is the ion product constant of water (1.0 x \(10^-14\)) and Ka is the acid dissociation constant of the conjugate acid of the weak base, which is C6H5NH3+.

The pH of a 0.050 M solution of aniline (C6H5NH2) is 8.66, indicating that aniline acts as a weak base. The dissociation reaction of aniline in water can be written as C6H5NH2(aq) + H2O(l) ⇌ C6H5NH3+(aq) + OH-(aq). Using the pH value and the equation for the dissociation reaction, we can calculate the pOH of the solution. pOH = 14 - pH = 14 - 8.66 = 5.34. The equilibrium constant expression for the reaction can be written as Kb = [C6H5NH3+][OH-]/[C6H5NH2]. Substituting the values and solving for Kb, we get Kb = 4.2 x \(10^-10\). Therefore, the correct answer is an option (c).

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After, after 12 hours, we would anticipate roughly 27 mutations to be present in the S. aureus population in your foot wound.

Part 1-

First, the size of the S. aureus population in the wound in your foot should be found. Let's assume that the population size is 1 million (1 x 10^6) cells.

The  mutations estimated in one generation per cell are:

1 mutation per 10¹⁰base pairs

The base pairs in the genome of S. aureus are 2.8 x 10⁶

Therefore, the expected number of mutations per generation per cell is:

(2.8 x \(10^{6}\)) / (\(10^{10}\)) = 2.8 x \(10^{-4}\) mutations per cell per generation

To estimate the number of mutations in the population which occur after 12 hours the number of generations that have passed needs to be known. The generation time of  S. aureus is approximately 30 minutes, so the number of generations in 12 hrs (hours) will be:

12 hrs x (60 minutes/hr) / (30 minutes/generation)

= 24x4 equals 96 generations

In 96 generations the approximate number of mutations per cell is:

96 generations x 2.8 x \(10^{-4}\) mutations per cell per generation

= 0.027 mutations per cell

If we multiply mutations per cell by the number of cells in the population, to know the total number of mutations in the population:

i.e.,0.027 mutations taking place per cell x 1 x 10⁶ cells gives 27 mutations

Therefore, after 12 hours, we can expect approximately 27 mutations to be present in the population of S. aureus inside the wound in your foot.

Estimatedly, 0.0028 mutations will take place per cell in the population. After the end of 12 hours, 0.0028 * 16,777,216 = 46,976 new mutations will exist.

Part 2-

The implications of this genetic diversity in the context of treating possible infections is that host genetic diversity is thought to reduce the possibility that the disease will widen in natural populations.

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Answer:

2 L I think hope it is peace out

1.  Consider the reaction: 5 A + 3 B → 2 C The rate of the reaction is found to be 0.0486 M/s. Then, The rate of change of B is 0.01215 M/min.

2.  For the following zero order reaction, the rate constant is 0.0311.

If [A₀] = 8.68, calculate [A] at 2.9 seconds. Then, [A] = 8.66445 ≈ 8.7.

(1) For Reaction : 5A + 3B → 2C

R₁ : 0.080486 M/s = K[A][B]²          ---------------------- (1)

When half of the B has reacted, then,

⇒ R₂ = k[A][B/2]                   -------------------------- (2)

Dividing (2) and (1), we get:

   R₂÷ R₁ = K[A] [B/2] ÷ K[A] /[B]

⇒  R₂÷ R₁ = B²/4 ÷ B²

⇒ R₂÷ R₁ = 1/4

Therefore,

R₁ /4 = 0.0486/ 4

        = 0.01215 M/minute.

Therefore,

Consider the reaction: 5 A + 3 B → 2 C The rate of the reaction is found to be 0.0486 M/s. Then, The rate of change of B is 0.01215 M/min.

(2) For a Zero Order reaction:

t = K[A₀] [A] ÷ K               ------------------------- (1)

Given that:

t = 2.9 Second

and, k = 0.0311

Converting Seconds into minutes:

t = 2.9 second = 0.048 Minutes ≈ 0.5 Minutes.

Putting the values in equation (1)

⇒ 0.5 = 8.68 - [A] ÷ 0.0311

⇒ 0.5 × 0.0311 = 8.68 - [A]

⇒ 0.01565 - 8.68 = - [A]

⇒ [A] = 8.66445

Therefore, [A] = 8.66445 ≈ 8.7

Based on the zero order reaction, the rate constant is 0.0311. If [A]0 = 8.68, calculate [A] at 2.9 seconds. Then, [A] = 8.7

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Answer:

Explanation: Over the course of a year, areas near Earth’s equator receive more direct energy from the Sun than areas near Earth’s poles.  Which of the following correctly describes one result of this heating pattern?

Explanation:

We are given: Ka = 4.83*10^-8

We use Ka to find pKa:

We know: pKa + pKb = 14

Answer:

pKb = 6.68

Answer:

The moles of gas is 0.009474 moles.

Explanation:

Given that,

Volume = 526 mL

Pressure = 346 mmHg

Temperature = 35.0°C

We need to calculate the moles of gas

Using formula of ideal gas

\(n=\dfrac{PV}{RT}\)

Where, P = pressure

V = volume

R = gas constant

T = temperature

Put the value into the formula

\(n=\dfrac{\dfrac{346}{760}\times0.526}{0.08206\times(35+273)}\)

\(n=0.009474\ moles\)

Hence, The moles of gas is 0.009474 moles.

The element is Neon
The protons is the same as the atomic number (10 protons)
The electrons are the same as the number of protons in a neutral atom (10 electrons)
The neutrons can be found by subtracting the protons from the atomic mass (22-10=12 neutrons)

Answer:

In a open system, the thermal energy of a system may be changed by adding or removing matter with a different temperature.

Explanation:

The thermal energy of a system can be changed when a new substance of different temperature is introduced into the system

The thermal energy of a system is the amount of heat energy contained in that system.

The quantity of heat in a system is given as;

\(Q = mc \Delta \theta\)

where;

\(\Delta \theta\) is the change in the temperature of the system

When a new substance is introduced into the system, the temperature of the resulting system changes.

For example;

Thus, the thermal energy of a system can be changed when a new substance of different temperature is introduced into the system.

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Answer:

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

In order to answer the question first we must write the atomic number of each element:

Zirconium (Zr): 40

Cadmium (Cd): 48

Iridium (Ir): 77

Iron (Fe): 26

Then, we have to complete the distribution of electrons in each orbital for each atom:

The first 4 levels have the following distribution:

Level1: 1s

Number of electrones: 2

Level 2: 2s, 2p

Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).

Level3: 3s, 3p, 3d

Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)

Level 4: 4s, 4p, 4d, 4f

Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)

The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.

The order is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...

Now, knowing the atomic number we can answer the question:

For Zirconium (total 40 electrones):

2 electrones are predicted in the 4d orbital

For Cadmium (total 48 electrones):

10 electrones are predicted in the 4d orbital

For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.

For iron (total 26 electrones)

Iron has no electrones in the 4d orbitals

Answer:

Using the drop down Menu

Proton : Possessing a Charge of +1. It is found in the Nucleus and has a Mass of "A"

Neutron; Possesses a charge of 0. It is situated in the Nucleus and Has a Mass of "B"

Electron: Has a charge of -1. Found in the Orbitals of the atom and has a mass of "C"

you decide to test your pillbugs' preference for an acidic environment versus a nonacidic environment. on one side of the chamber you place filter paper moistened with water. Dry filter paper is appropriate to place on the other side to test this variable.

Armadillidiidae (Pillbugs) is a family of woodlice, a terrestrial crustacean group in the order Isopoda. Unlike members of some other woodlice families, members of this family can roll into a ball, an ability they share with the outwardly similar but unrelated pill millipedes and other animals. This ability gives woodlice in this family their common names of pill bugs or roly polies.Other common names include slaters, potato bugs, and doodle bugs. Most species are native to the Mediterranean Basin, while a few species have wider European distributions. The best-known species, Armadillidium vulgare, was introduced to New England in the early 19th century and has become widespread throughout North America.

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Cu(NO3)2 has a mass of 4.69 g in 25.0 g of a 1.00 M solution of Cu(NO3)2(aq). A physical term used to describe the amount of matter in a thing is "mass."

The formula: moles of solute = concentration x volume of solution can be used to determine the mass of Cu(NO3)2 contained in 25.0 g of a 1.00 M solution of Cu(NO3)2(aq). Finding the volume of the solution containing one mole of Cu(NO3)2 is the first step.

Per litre of solution, 1.00 M equals 1 mole of Cu(NO3)2.

Cu(NO3)2 weights 187.6 g per mole.

Cu(NO3)2 mole 1 = 187.6 g

Cu(NO3)2:0.1 mole = 18.76 g

to prepare a Cu 1.00 M solution (NO3)

2. 18.76 g of Cu(NO3)2 must be dissolved in 1.00 L of solution.

the mass of Cu(NO3)2 present based on the molar mass of Cu(NO3)2:

Cu(NO3)2 mass equals 4.69 g or 0.0250 mol x 187.6 g/mol.

Hence, the quantity of Cu(NO3)2 in Cu(NO3)2(aq) in a 1.00 M solution has a mass of 4.69 g per 25.0 g.

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Answer:

It is illegal

Explanation:

Fracking involves drilling deep into the earth crust in which a water mixture with high pressure is directed at the rock with the purpose of releasing the gas inside. This process is common in the exploration of natural gas and other hydrocarbons.

It is however illegal because the water are mostly contaminated due to the hydrocarbons present and harmful to life. It is advisable and the best to remove the water and recycle them in treatment plants

The acid-catalyzed generation of an enol followed by electrophilic addition of bromine leads to the formation of a carbocation. The specific carbocation formed depends on the structure of the starting compound.

For example, let's consider the reaction between acetone (CH3COCH3) and bromine (Br2). In the presence of an acid catalyst, acetone can undergo tautomeric equilibrium to form its enol form, which is CH3C(OH)=CH2. The acid-catalyzed generation of the enol involves the transfer of a proton from the acid catalyst to the oxygen atom of the carbonyl group. This protonation creates a positive charge on the oxygen atom, stabilizing the enol form.

Once the enol is formed, it can react with the electrophilic bromine (Br2) to form a bromo compound. The bromine molecule acts as an electrophile, attacking the carbon-carbon double bond in the enol. This leads to the formation of a carbocation intermediate, where the positive charge is located on the carbon atom that was previously part of the double bond.
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Answer:

The correct answer is A

Explanation:

A radio telescope is used to detect, collect and focus radio waves from distant objects in the sky or space. While a compound telescope, by design, can both refract and reflect waves. A reflection telescope uses curved mirrors to reflect light to form an image. A refraction telescope forms an image using a lens as its objective.

From the above definitions, it can be deduced that option A is the correct answer.

Answer:

MARK AS THE BRAINLIEST ANSWER

Explanation:

BRAINLIEST

The key differences between the Articles of Confederation and the U.S Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

The document created the better system of government for the new nation is the US constitution.

The Article of confederation , the state have stronger power than the central power and in the US constitution , the power of central government is stronger than the states. The important development was the establishment of three departments. There are three departments of government that is legislative , executive and judicial.

Thus, The key differences between the Articles of Confederation and the U.S. Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

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Answer:

Molarity(M) = 0.24M in (NH₄)₂Cr₂O₇.

Explanation:

By definition a solution is a homogeneous physical mixture of two substances, a solute (item in least amount) and solvent (item in greatest amount). Typically the solution is generally described in terms of the concentration of solute in solution (solute + solvent). Concentration is, by definition amount of solute divided the volume of solution. That is ...

concentration = amount solute / volume of solution

There are numerous unit expressions of concentration such as lbs/gal, lbs/ft³, grams/ml and molarity(M). For this problem, Molar Concentration following concentration definition is ...

Molarity(M) = moles solute / volume of solution in liters

moles of (NH₄)₂Cr₂O₇ = 30.05g/252.07g/mole = 0.12mole

Volume of Solution = 500ml = 0.500Liters

∴Molarity = [(NH₄)₂Cr₂O₇] = 0.12 moles / 0.500L = 0.24M in (NH₄)₂Cr₂O₇.

Note => the brackets [ ] around the formula (NH₄)₂Cr₂O₇ indicates Molar concentration.

Iron is made up of atoms. The thermal expansion of solid iron is caused by  increasing the distance between equilibrium positions for the vibrating iron atoms.

What are the factors affecting thermal expansion?

Its original length, the temperature change, and the metal's own thermal (heat) qualities all have a role in how much it expands. Simply said, some materials expand more readily than others. Each wire will grow by a different amount when aluminium, iron, and tungsten metal wires are heated to the same temperature and to the same size. The coefficient of expansion of a substance determines how easily it expands.

Only the wire's starting length and the temperature it is heated to determine how much the wire will expand when heated. A 16 foot (5 meter) long iron bar will expand more than a 3 foot (1 meter) long bar.

Thermal expansion, which typically excludes phase transitions, is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature.

The average molecular kinetic energy of a substance has a monotonic relationship with temperature. When something is heated, the molecules start to move and vibrate more, usually putting more space or distance between them. The molecules often retain a greater average spacing as a result. Thermal expansion is caused by the asymmetry of a solid's interatomic potential energy curve.

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Answer:

1.099 gmL¯¹ ≈ 1.1 gmL¯¹

Explanation:

From the question given above, the following were obtained:

Mass of empty cylinder = 9.5 g

Mass Cylinder + NaOH = 31.92 g

Volume of solution = 20.4 mL

Concentration of solution =?

Next, we shall determine the mass of sodium hydroxide, NaOH. This can be obtained as as illustrated below:

Mass of empty cylinder = 9.5 g

Mass Cylinder + NaOH = 31.92 g

Mass of NaOH =?

Mass of NaOH = (Mass Cylinder + NaOH) – (Mass of empty cylinder)

Mass of NaOH = 31.92 – 9.5

Mass of NaOH = 22.42 g

Finally, we shall determine concentration of the solution as follow:

Mass of NaOH = 22.42 g

Volume of solution = 20.4 mL

Concentration of solution =?

Concentration = mass /volume

Concentration of solution = 22.42 / 20.4

Concentration of solution = 1.099 gmL¯¹ ≈ 1.1 gmL¯¹

Therefore, the concentration of the solution is 1.1 gmL¯¹

The formation constant expression relates to the equilibrium constant for the formation of a complex ion.

In this case, the hydrated metal ion (M(H2O)n) is forming a complex with two cyanide ions (CN^-) to form the aqueous complex (M(CN)2(H2O)n). The formation constant expression for this equilibrium is:

Kf = [M(CN)2(H2O)n] / [M(H2O)n] [CN^-]^2

where Kf is the formation constant, [M(CN)2(H2O)n] is the concentration of the aqueous complex, [M(H2O)n] is the concentration of the hydrated metal ion, and [CN^-] is the concentration of the cyanide ion.

The balanced chemical equation for the last step in the formation of the complex is:

M(H2O)n + 2CN^- → M(CN)2(H2O)n

where M represents the metal ion and n represents the number of water molecules associated with the metal ion. This equation shows that two cyanide ions are needed to form the complex with the hydrated metal ion.

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When iron-rich materials cool below their Curie temperature, they may preserve the orientation of the magnetic field.

The Curie temperature is the temperature at which a ferromagnetic material loses its magnetic properties. When a ferromagnetic material is heated to its Curie temperature, the thermal energy causes the magnetic moments of the atoms in the material to become disordered, which causes the material to lose its magnetic field. When the material cools below its Curie temperature, the magnetic moments of the atoms become ordered again, but the orientation of the magnetic field may not be preserved. However, in iron-rich materials, if the cooling process is slow enough, the orientation of the magnetic field can be preserved, creating a record of the Earth's magnetic field at the time the material cooled. This property has been used to study the Earth's magnetic field history by analyzing the magnetic properties of rocks and sediments.

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Answer:

1. Pharynx

2. Larnyx

3. Mouth

4. Trachea

5. Lungs

6. Diaphragm

7. Bronchi

8. Alveoli

9. Nasal Cavity

10. Bronchioles