What is the electron configuration of the element in period 2 that has 5 valence electrons (valence electrons are the electrons in the outermost shell) *

The only achiral amino acid among the 20 standard amino acids in the genetic code is glycine (Gly or G). Achiral means that the molecule is identical to its mirror image and cannot exist in enantiomeric forms. Unlike other amino acids, glycine does not have a stereocenter. Therefore, glycine lacks a chiral center, which makes it achiral.

Glycine is the simplest amino acid, with a hydrogen atom as its side chain. It is considered non-polar and is often found in the interior of proteins, where it can form hydrogen bonds with other amino acids or with water molecules. Glycine is also an important neurotransmitter in the central nervous system, where it acts as an inhibitor and regulates the excitability of neurons. Because of its small size and lack of a bulky side chain, glycine is often used as a spacer or linker in peptide synthesis or to disrupt protein structures. It is also a common ingredient in many dietary supplements, as it is involved in the synthesis of proteins, DNA, and other important molecules in the body.

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Answer:A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetized materials. A charge that is moving in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field

Explanation:hope this helps :DD

The charge on ammonium is +1, indicating that it has one less electron than protons. In ammonium, nitrogen forms four covalent bonds with four hydrogen atoms, using four of its valence electrons. Each hydrogen atom contributes one valence electron to the bonding process.

As a result, the total number of valence electrons in ammonium is 5 (from nitrogen) + 4 (from four hydrogen atoms) = 9. Since nitrogen's valence electron count is less than its usual five, it has an electron deficiency. This deficiency is balanced by a positive charge on the ammonium ion.

In summary, the charge on ammonium is +1 because nitrogen forms four covalent bonds with hydrogen atoms, resulting in an electron deficiency in the nitrogen atom.

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Answer:

0.80 mol

Explanation:

n(H)/n(N) = 1/3

n(N) = 3×0.60

n(N) = 1.8 mol

n(N) in excess = 1.80-0.60 = 1.20 mol

n(N)/n(NH3) = 3/2

n(NH3) = 2/3×1.20 = 0.80 mol

Answer:

Number of neutrons in the nucleus.

Explanation:

Mass number is protons plus neutrons. Protons do not change from isotope to isotope

Answer:this air polluction here.

Explanation:

air and soil polluction

Answer:

False

Explanation:

Answer:

:0

Explanation:

Answer: The concentration of the acid Vincent produced is 0.083 M.

Explanation:

Given: Mass = 6.5 g

Volume = 600.0 mL (1 mL = 0.001 L) = 0.6 L

Moles is the mass of substance divided by its molar mass. So, moles of bromic acid (molar mass = 128.91 g/mol) are calculated as follows.

\(Moles = \frac{mass}{molar mass}\\= \frac{6.5 g}{128.91 g/mol}\\= 0.05 mol\)

Molarity is the number of moles of a substance present in liter of a solution.

Therefore, molarity (concentration) of the given solution is calculated as follows.

\(Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.05 mol}{0.6 L}\\= 0.083 M\)

Thus, we can conclude that the concentration of the acid Vincent produced is 0.083 M.

Answer:

A is the correct option

Explanation:

batteries have chemical energy and will convert to electricity and when reached to bulb, it emits light as electromagnetic rays

The mass of glucose is 259 g

We have to note that if we are to solve the problem that we have we would have to look at the stoichiometry of the reaction and that is why we have the balanced reaction equation here.

The reaction equation is;

6CO2 + 6H2O → C6H12O6 + 6O2

Now we know that;

Number of moles of water = 4.25 g /18 g/mol

= 0.24 moles

Number of moles of CO2 = 18.0 g/44 g/mol

= 0.41 moles

Given the reaction equation;

If 6 moles of CO2produces 1 mole of glucose

0.24 moles of produces 0.24 * 6/1

= 1.44 moles

Mass of glucose =  1.44 moles * 180 g/mol

= 259 g

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Answer: PtF6

Explanation:  is one of seventeen known binary hexafluorides.

Answer:

a. the weeks she ate the chocolate

b. how many pimples were on her face

c. how much chocolate she ate

(I'm pretty sure A. is right but I might be wrong)

Answer:

Explanation:

a. Independent Variable = time , starting number of pimples

b. Dependent Variable = the number of pimples

C. Control =  the chocolate quantity , 2 weeks for eating and 2 weeks for chocolate fasting " The think this time equalizing is a control factor "

Answer:

Water is the answer

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(a)

pH = 4.77

; (b)

[

H

3

O

+

]

=

1.00

×

10

-4

l

mol/dm

3

; (c)

[

A

-

]

=

0.16 mol⋅dm

-3

Explanation:

(a) pH of aspirin solution

Let's write the chemical equation as

m

m

m

m

m

m

m

m

l

HA

m

+

m

H

2

O

⇌

H

3

O

+

m

+

m

l

A

-

I/mol⋅dm

-3

:

m

m

0.05

m

m

m

m

m

m

m

m

l

0

m

m

m

m

m

l

l

0

C/mol⋅dm

-3

:

m

m

l

-

x

m

m

m

m

m

m

m

m

+

x

m

l

m

m

m

l

+

x

E/mol⋅dm

-3

:

m

0.05 -

l

x

m

m

m

m

m

m

m

l

x

m

m

x

m

m

m

x

K

a

=

[

H

3

O

+

]

[

A

-

]

[

HA

]

=

x

2

0.05 -

l

x

=

3.27

×

10

-4

Check for negligibility

0.05

3.27

×

10

-4

=

153

<

400

∴

x

is not less than 5 % of the initial concentration of

[

HA

]

.

We cannot ignore it in comparison with 0.05, so we must solve a quadratic.

Then

x

2

0.05

−

x

=

3.27

×

10

-4

x

2

=

3.27

×

10

-4

(

0.05

−

x

)

=

1.635

×

10

-5

−

3.27

×

10

-4

x

x

2

+

3.27

×

10

-4

x

−

1.635

×

10

-5

=

0

x

=

1.68

×

10

-5

[

H

3

O

+

]

=

x

l

mol/L

=

1.68

×

10

-5

l

mol/L

pH

=

-log

[

H

3

O

+

]

=

-log

(

1.68

×

10

-5

)

=

4.77

(b)

[

H

3

O

+

]

at pH 4

[

H

3

O

+

]

=

10

-pH

l

mol/L

=

1.00

×

10

-4

l

mol/L

(c) Concentration of

A

-

in the buffer

We can now use the Henderson-Hasselbalch equation to calculate the

[

A

-

]

.

pH

=

p

K

a

+

log

(

[

A

-

]

[

HA

]

)

4.00

=

−

log

(

3.27

×

10

-4

)

+

log

(

[

A

-

]

0.05

)

=

3.49

+

log

(

[

A

-

]

0.05

)

log

(

[

A

-

]

0.05

)

=

4.00 - 3.49

=

0.51

[

A

-

]

0.05

=

10

0.51

=

3.24

[

A

-

]

=

0.05

×

3.24

=

0.16

The concentration of

A

-

in the buffer is 0.16 mol/L.

hope this helps :)

The equilibrium constant of this reaction is 1.80×10-5

Given data,

pH of solution = 2.873

Number of moles of acetic acid (m) = 0.05 moles

Volume of water (V) =  500 mL = 0.5L

So, concentration (C) = m/V in lit = 0.05/0.5 = 0.1 M

Equilibrium constant ( K ) = \([CH_{3} COO-]\)×\([H+_{} ]\)/\([CH_{3} COOH]\)

Since, acetic acid is weak acid,

So, Equilibrium constant ( K ) = \([H+]^{2}\)/\([CH_{3} COOH]\)   ....(i)

As the pH = 2.873, the \([H+_{} ]\) is antilog of -2.873 or 1.34×10-3 M.

Putting the value of concentration of \(H+_{}\) and \(acetic_{} acid\) in equation (i).

Equilibrium constant ( K ) = 1.80×10-5

The acid which is partially dissociates into ions on dissolving in aqueous solution is called weak acid.

Example: \(acetic_{} acid\).

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Chromium has a face-centered cubic lattice structure. This means that each unit cell has 8 corner atoms and 6 face-centered atoms. The atomic mass of chromium is 52.01 g/mol.

Using this information, we can calculate the number of atoms in a unit cell by taking the density of the metal and dividing it by the atomic mass and then multiplying by the volume of the unit cell. This gives us a total of 8.62 x 10^22 atoms in a unit cell, which consists of 8 corner atoms and 6 face-centered atoms.

The face-centered cubic lattice is a three-dimensional structure formed by eight corner atoms and six face-centered atoms. This structure is characterized by the fact that each atom is surrounded by eight equivalent atoms spaced at equal distances.

The face-centered cubic structure has many advantages, such as its high symmetry, which makes it ideal for many materials, such as metals and semiconductors. The face-centered cubic lattice also has a higher packing efficiency than the other cubic lattices, making it the most efficient structure for storing atoms.

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Answer: c. Shared equally between two atoms

Electrons are shared equally because the atoms have the same electronegativity.

The enzyme β-ketothiolase cleaves off the acetyl-CoA molecule from the 3-ketoacyl-CoA, releasing acetyl-CoA and the remaining fatty acid chain forms acyl-CoA, which is two carbons shorter than the original fatty acid chain.

The complete reaction scheme for the catabolism of Oleoyl-CoA is given below:Oleoyl-CoA is broken down into acetyl-CoA, releasing 150 ATP molecules by the process of Beta-oxidation. The complete reaction scheme for the catabolism of Oleoyl-CoA is given below:

Step 1: Oleoyl-CoA is transported to the mitochondria matrix from the cytoplasm with the help of the carnitine shuttle system.

Step 2: The enzyme Acyl-CoA dehydrogenase catalyzes the removal of two hydrogen atoms from the alpha and beta carbons in the fatty acid chain and oxidizes it. This process forms a double bond between the alpha and beta carbon atoms, leading to the formation of trans-Δ2-enoyl-CoA.

Step 3: The enzyme enoyl-CoA hydratase adds a water molecule to the trans-Δ2-enoyl-CoA, converting it into L-3-hydroxyacyl-CoA.

Step 4: The enzyme L-3-hydroxyacyl-CoA dehydrogenase oxidizes L-3-hydroxyacyl-CoA, releasing a hydrogen ion (H+) and two electrons (2e-) and converts it into 3-ketoacyl-CoA.

Step 5: The enzyme β-ketothiolase cleaves off the acetyl-CoA molecule from the 3-ketoacyl-CoA, releasing acetyl-CoA and the remaining fatty acid chain forms acyl-CoA, which is two carbons shorter than the original fatty acid chain.

The cycle starts again, and this process is repeated until the fatty acid chain is completely degraded.

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Answer:

Convection is a heat transfer mechanism where heat moves from one place to another through fluid currents. Forced convection is simply using this mechanism in a useful way to heat or cool a home efficiently, such as using a fan.

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass of object = 40 g

volume = 5 mL

The density of the object is

\(density = \frac{40}{5} \\ \)

We have the final answer as

Hope this helps you

Answer:

a

Explanation:

The overall equation is \(C_2H_4 + H_2 ---- > C_2H_6\).

A chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols and formulas, in which reactant elements are given on the left and product units on the right.

For example,

\(NaOH+ HCl ---- > NaCl+ H_2O\)

In this, reactants are converted to products which is symbolized by a chemical equation. For example, iron (Fe) and sulfur (S) combine to form iron sulfide (FeS).

Fe(s) + S(s) → FeS(s)

here, the plus sign indicates that iron reacts with sulfur.

Thus, the overall equation is \(C_2H_4 + H_2 ---- > C_2H_6\).

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The pH of the buffer solution containing 0.18 M H₂CO₃ and 0.25 M NaHCO₃ is approximately 6.513.

To calculate the pH of the buffer solution, we can use the Henderson-Hasselbalch equation;

pH = pKa + log([A⁻]/[HA])

In this case, H₂CO₃ acts as a weak acid (HA) and its conjugate base, HCO₃⁻, acts as the salt (A⁻).

Given; [H₂CO₃] = 0.18 M

[HCO₃⁻] = 0.25 M

pKa = -log(Ka) = -log(4.3 × 10⁻⁷)

Let's substitute the values into the Henderson-Hasselbalch equation and calculate the pH;

pH = (-log(4.3 × 10⁻⁷) + log(0.25/0.18)

pH = (-(-6.37)) + log(1.39)

pH = 6.37 + 0.143

pH = 6.513

Therefore, the pH of the buffer solution will be 6.513.

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Answer:

  C. The boiling point of water

Explanation:

The shape of the water and its rate of evaporation (including steam generation) will change across containers with different shapes, surface areas, and temperatures. The appropriate choice is the one shown above.

Answer:

D. the solvent particles to be spread further out and have more to move, increasing their kinetic energy.

Explanation:

The answer is d. Ozone can be formed as a result of the sun's action on nitrogen oxides and hydrocarbons. This is known as photochemical smog.

A type of smog called photochemical smog is created when UV radiation from the sun and atmospheric nitrogen oxides interact. The morning and afternoon hours are when this is most noticeable as a brown haze, especially in warm, densely populated places.

When sunlight reacts with nitrogen oxides, together with at least one other volatile organic compound (VOC) that is present in the atmosphere, photochemical smog is created.

Therefore, the concentration of secondary pollutants is what causes the process that results in photochemical smog and acid rain.

Due to the concentration of secondary pollutants, photochemical haze and acid rain are produced.

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The concentration of HCl is 0.093 M

What is titration?

Titration is a typical quantitative chemical analysis method used in laboratories to ascertain the concentration of an identified analyte. It is also referred to as titrimetry and volumetric analysis (a substance to be analyzed). A reagent, also known as a titrant or titrator, is created as a standard solution with a specified volume and concentration.

The concentration of the analyte is determined by the titrant's reaction with an analyte solution (also known as the titrand). Titration volume refers to the volume of titrant that interacted with the analyte.

Given,

Volume of NaOH = 12.7 ml

Concentration of NaOH( MNaOH) = 0.185 M

Volume of NaOH= 25.0 ml

HCl  +  NaOH   →     NaCl  + H2

In this chemical reaction the ratio between the number of moles of HCl and NaOH is 1:1 .

moles of HCl = moles of NaOH

MHCl * Volume of HCl = MNaOH × Volume of NaOH

MHCl =  (MNaOH ×volume of NaOH)/ volume of HCl

MHCl = (   0.185  * 12.​7)/ 25

MHCl         = 0.093 M

​Hence, the concentration of HCl is 0.093 M

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The main purpose of creating serial dilutions of a stock solution is to obtain a series of solutions with different concentrations that are suitable for various analytical applications.

Serial dilutions involve the stepwise dilution of a concentrated stock solution with a solvent, such as distilled water or buffer solution. The result is a series of solutions with decreasing concentrations, which are typically prepared in a logarithmic fashion, such as 1:10 or 1:100 dilution factors.

Serial dilutions are useful in a variety of applications, such as in microbiology for counting bacteria or in biochemistry for enzyme kinetics. In microbiology, serial dilutions are used to dilute bacterial or fungal cultures to obtain a known concentration of cells that can be counted using a microscope or plate count method.

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When there is any visible tear in the gloves is a correct answer to the question.

It is important to replace gloves immediately if there is any visible tear or puncture, as this can compromise the integrity of the glove and expose you to harmful chemicals or pathogens.

When the gloves have been exposed to a solvent is also a correct answer, as solvents can degrade glove materials and compromise their ability to provide protection. It is important to replace gloves if they have been exposed to solvents to ensure that they provide adequate protection.

When you handle a new piece of glassware and When you mix two chemicals in the lab are not necessarily reasons to replace gloves. However, it is always important to follow the specific protocols and guidelines established by your lab to ensure safe handling of chemicals and materials.

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The material that forms oxide in the presence of oxygen and water only, and its suspension in water turns red litmus blue is Sodium oxide (Na2O).

Sodium oxide (Na2O) is a material that reacts with water and forms a basic solution with a pH greater than 7. It forms oxide in the presence of oxygen and water only. The chemical equation for the reaction of sodium oxide with water is given below:Na2O + H2O → 2NaOH.

The water molecules get hydrolyzed by sodium oxide to form sodium hydroxide (NaOH), which is a strong base. Sodium hydroxide gives a basic solution with a pH of about 12. It has the property of turning red litmus blue. Therefore, the material is Sodium oxide (Na2O).Hence, the main answer is Sodium oxide (Na2O).

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The total energy required to heat 79.0 g of \(H_2O\)(s) at -20.0 °C to \(H_2O\)(g) at 131.0 °C is approximately 108,012 J or 108 kJ at 1 atm.

To calculate the energy required to heat the given amount of \(H_2O\)(s) to \(H_2O\)(g), we need to consider two steps: heating the ice from -20.0 °C to 0 °C, and then heating the liquid water from 0 °C to 131.0 °C.

First, we need to calculate the energy required to heat the ice from -20.0 °C to 0 °C. The specific heat capacity of ice is 2.09 J/g·°C.

Energy for heating ice = mass of ice * specific heat capacity of ice * change in temperature

Energy for heating ice = 79.0 g * 2.09 J/g·°C * (0 °C - (-20.0 °C))

Next, we calculate the energy required to heat the liquid water from 0 °C to 131.0 °C. The specific heat capacity of liquid water is 4.18 J/g·°C.

Energy for heating liquid water = mass of liquid water * specific heat capacity of water * change in temperature

Energy for heating liquid water = 79.0 g * 4.18 J/g·°C * (131.0 °C - 0 °C)

Finally, we add up the energy required for both steps to get the total energy required:

Total energy = Energy for heating ice + Energy for heating liquid water

Calculating the values:

Energy for heating ice = 79.0 g * 2.09 J/g·°C * 20.0 °C

Energy for heating liquid water = 79.0 g * 4.18 J/g·°C * 131.0 °C

Total energy = Energy for heating ice + Energy for heating liquid water

By plugging in the values and performing the calculations, we can find the total energy required to be approximately 108,012 J or 108 kJ at 1 atm.

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