At composition a and a temperature of 1800 °c, determine the phases present, composition of each phase, and weight fraction of each phase.

Answers

Answer 1

Without additional information about the composition, it is not possible to determine the phases present at a temperature of 1800 °C.

However, assuming that the composition is known, we can use a phase diagram to determine the phases present at that temperature and their compositions.

A phase diagram is a graphical representation of the phases that are present in a system as a function of temperature, pressure, and composition.

It can be used to determine the conditions under which different phases are stable and the compositions of those phases.

Once the composition is known, we can locate it on the phase diagram and determine the phases that are present at 1800 °C.

We can then use the lever rule to calculate the compositions and weight fractions of each phase.

The lever rule is a simple way to calculate the compositions and weight fractions of the phases present in a two-phase system.

It states that the weight fraction of one phase is proportional to the length of the tie line that connects the composition of the two phases on the phase diagram.

However, without the composition or the phase diagram, it is not possible to provide a specific answer to this question.

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Related Questions

Oxidizing acids, such as nitric acid, can explode when mixed with what type of incompatible chemical? air water organic chemicals or materials compressed gases

Answers

Oxidizing acids, such as nitric acid, can explode when mixed with what type of incompatible chemicals like alcohol, or charcoal.

An oxidizing acid is a Brønsted acid that is a strong oxidizing agent. most Brønsted acids can act as oxidizing agents because the acidic proton can be reduced to hydrogen gas. a few acids include other structures that act as stronger oxidizing agents than hydrogen ions.

Oxidizing acids include concentrated perchloric acid, nitric acid, iodic acid, chromic acid, and the glass cleansing mixture of chromium trioxide and sulfuric acid.

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In which form are water molecules most closely bonded to each other?

Answers

Answer:

In solid

Explanation:

As a solid has very tightly packed molecules which move very difficulty and only vibrate

What are the spectator ions when k2s and mgcl2 are combines

Answers

The spectator ions of when k2s and mgcl2 are combined are 1. Cl- (aq) and 2. K (aq)

the balance equation of MgCl2 and  K2S is as follows:

MgCl2(aq) + K2S(aq) ------> MgS(s) + 2KCl(aq)

the net ionic equation is as follows:

Mg 2+ (aq) + 2 Cl- (aq) + 2K (aq) + S 2- (aq) = MgS(s) +2 Cl- (aq) + 2K (aq)

The overall reaction is as follows:

Mg 2+ (aq) + S 2- (aq) = MgS(s)

Thus the spectator ions are the following:

Cl- (aq)

K (aq)

If we compare the solutions before and after the reaction, sodium and nitrate ions are present in both the solutions. They do not undergo any chemical exchange at all. These ions are called spectator ions since they don't participate in the chemical reaction at all (they simply "watch").

Compare the reactant and product sides of the rewritten reaction and cross out the spectator ions. Any dissolved ions that appear in the same form on both sides are spectator ions.

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How much energy does a 9 × 108 m wavelength photon have?

Answers

Answer:

2.2 x 10⁻³⁴ J

      or

2.2 x 10⁻¹⁸ J

Explanation:

You can calculate the energy using the photon energy equation:

E = hc / λ

In this equation,

-----> E = energy (J)

-----> h = Planck's Constant (6.626 x 10⁻³⁴ J*s)

-----> c = speed of light (3.0 x 10⁸ m/s)

-----> λ = wavelength (m)

You can plug the given wavelength, along with the other constants, into the equation and simplify to find the energy.

E = hc / λ

E = (6.626 x 10⁻³⁴ J*s)(3.0 x 10⁸ m/s) / (9 x 10⁸ m)

E = 2.2 x 10⁻³⁴ J

I suspect that you may have forgotten the negative sign in front of the 8 (9 x 10⁻⁸). This would change your answer to 2.2 x 10⁻¹⁸ J.

Ethene is exposed to h2 in a solution containing a chunk of solid palladium. if it reacts successfully, the original alkene will:________

Answers

If ethene and hydrogen reacts successfully in a solution containing a chunk of solid palladium, the original alkene will become unsaturated.

What is hydrogenation?

The term hydrogenation is used in chemistry to describe that addition of hydrogen to an unsaturated compound. Recall that ethene is an un saturated compound (alkene) and one of the reactions that an unsaturated compound can undergo is the addition of atoms or group across the double bond to yield adducts.

In this case, the adduct is a compound that is saturated ad will not have the same properties as ethene because the carbon carbon double bond that was characteristic of ethene has been replaced by a carbon carbon single bond.

Thus,  if ethene and hydrogen reacts successfully in a solution containing a chunk of solid palladium, the original alkene will become unsaturated.

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an acid accepts H and removes them from a solution, is a solution where the water molecules are intact

Answers

An acid accepts H and removes them from a solution

When placed in water, acids, bases, and salts dissociate (separate) into electrolytes (ions). Salts dissociate into a cation (that is not H+) and an anion (that is not OH-), whereas acids and bases dissociate into H+ and an anion. An acid separates into anions and hydrogen ions (H+). Strong acids produce a high concentration of H+ by dissociating every single one of their molecules . Water-based solutions,

Acid:

When a material or chemical is in solution, it releases hydrogen ions (H+), which are known as acids. All hydrogen ions (H+) and chloride ions (Cl-), which are normally bound together by ionic bonding, dissociate (separate) in water when exposed to a strong acid like hydrochloric acid (HCl). Only some ions disintegrate into hydrogen ions (H+) and bicarbonate ions (HCO3-) in a weak acid like carbonic acid (H2CO3), while others are still bound together by ionic bonds.

Define base?

A base is a chemical that, when in solution, emits hydroxyl ions -{OH). We can also define a base as a substance that releases hydroxyl ions (OH-), which mix with any hydrogen ions (H+) in the solution to generate water molecules (OH- + H+ = H2O).

Therefore, a substance that receives or accepts hydrogen ions (H+) that are already present in the solution qualifies as a base.

Because it totally dissociates into sodium ions (Na+) and hydroxyl ions (OH-) when placed in water, sodium hydroxide (NaOH), which is a strong base, is now liberated and dissolves in water.

c

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es endotermica o exotermica? naoh (ac) + hcl (ac) --> nacl (ac) + h2o (l) + 58.4 kj

Answers

Answer:

Exothermic

Explanation:

Reactions which are endothermic require heat. Reactions which are exothermic release heat as a product. Therefore, since heat is a product in this reaction (58.4 kJ), it is exothermic.

Remember,

reactants ---> products

please help me with this questio

Answers

The mass of the precipitate is 8.74 g and the concentration of the calcium nitrate is 0.061 M.

What mass of precipitate is formed?

The reaction is given by; 2AgNO3(aq) + CaCl2 (aq) ------>2AgCl(s) + Ca(NO3)2(aq)

Number of moles of AgNO3 = 195/1000 * 0.500 = 0.0975 moles

Number of moles of CaCl2 = 305/1000 * 0.100 = 0.0305 moles

If 2 moles of AgNO3 reacts with 1 mole of  CaCl2

0.0975 moles reacts with  0.0975 moles * 1 mole / 2 moles = 0.04875 moles

Thus CaCl2 is the limiting reactant.

1 mole of CaCl2 produces 2moles of AgCl

0.0305 moles produces 0.0305 moles * 2 moles/ 1mole

= 0.061 moles

Mass of precipitate =  0.061 moles * 143.32 g/mol

= 8.74 g

Now 1 mole of CaCl2  produces 1 mole of Ca(NO3)2

Total volume of solution = 195 ml + 305 ml = 500 ml or 0.5 L

Concentration of Ca(NO3)2 = 0.0305 moles/ 0.5 L

= 0.061 M

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__Pb(NO3)2 + __NaCI = __NaNO3 + __PbCI2

Answers

Answer:

Pb(NO3)2 + 2NaCl = 2NaNO3 + PbCl2

You have a 150mL sample of an aqueous solution at 25C. It contains 15.2mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 8.44 torr, what is the molar mass of the compound

Answers

The molar mass of the compound:

If the solution has an osmotic pressure of 8.44 torr, then the molar mass of the unknown non-electrolyte is 223.14 g.

What is osmosis?

Osmosis is defined as the flow of solvent molecules through semi-permeable membrane.Osmotic pressure is the pressure applied to stop the flow of solvent molecules.It is a colligative property that means osmotic pressure depends on the number of solute particles .

Therefore,

π[tex]V=inRT[/tex]  ( for electrolytes)

Where,   π= Osmotic pressure

i = Van 't Hoff factor

n= moles

R= Gaseous constant = 62.363577 L torr [tex]mol^{-1}K^{-1}[/tex]

T= Temperature

V= Volume of solution

Given:

T= 298K

V= 150 mL= 0.150 L

Given mass of unknown electrolyte= 15.2 mg = 15.2 x  [tex]10^{-3}[/tex] g

Osmotic pressure= 8.44 torr

Molar mass= ?

For non-electrolytes:

πV = n RT

πV=[tex]\frac{m}{M}[/tex]RT

Calculations:

Putting the given values in the formula:

8.44 x 0.150 =15.2 x [tex]10^{-3}[/tex]/ M x 62.36 x 298

1.266 = 282.5/M

M = 282.5/1.266

M = 223.14 g

Therefore,

The molar mass of the unknown non-electrolyte is 223.14g.

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A boy of mass 60 kg and a girl of mass 40 kg are together and at rest on a frozen pond and push each other apart. The girl moves in a negative direction with a speed of 3 m/s. What must be the total final momentum of the boy and girl combined?
A. 120 kgm/s
B. -100 kgm/s
C. 0 kgm/s
D. -120 kgm/s

Answers

The aggregate ultimate momentum of the boy and girl must be 0 kgm/s (option C).

Conservation of momentum:

According to the principle of momentum conservation, momentum is only modified by the forces acting as they are outlined by Newton's equations of motion; momentum is never generated nor destroyed inside a problem domain.

Example- A bullet leaves the pistol when it is fired and picks up speed. The gun recoils to maintain the system's motion. After the pistol is discharged, the total momentum of the pistol and the bullet will be zero in accordance with the law of conservation of momentum.

What is Momentum?

A characteristic of a moving body that it possesses due to its mass and motion and is equal to the sum of its mass and speed.

Therefore, according to the momentum conservation law, it can be concluded that the aggregate end momentum of the boy and girl must be 0 kgm/s (option C).

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Determine the number of moles in 50.0 grams of sodium. (the mass of one mole of sodium is 22.99 g.)

Answers

Answer:

2.17 moles

Explanation:

50 gm / 22.99 g / mole = 2.17 moles

Answer:

2.17

Explanation:

The bond_____
covalent bond.
is the actual number of bonded pairs of electrons in a

Answers

A covalent bond is the exact number of bonded pairs of electrons in a compound

One electron is added by each atom to a pair of shared electrons in a single bond. While double bonds share only one pair of electrons, triple bonds share three pairs. Bonds with multiple covalent bonds exchange several electron pairs

Covalent bonding happens when atoms share electron pairs. Atoms join together through covalent bonds to form a full electron shell, which boosts stability. By sharing their outermost (valence) electrons, atoms can fill out their outer electron shell and become stable. Nonmetals will swiftly create covalent bonds with other nonmetals in order to achieve stability.

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PLEASE HELP THANKSS-
How does a heterogeneous mixture differ from a homogeneous mixture? How are they similar?

Answers

A homogenous mixture has uniformly dispersed components while a heterogeneous mixture does not.

Homogenous vs heterogeneous mixtures

First of all, both homogenous and heterogenous mixtures consist of 2 or more non-reacting chemical components.

In homogenous mixtures, the chemical components are uniformly dispersed throughout the entire mixture.

In heterogeneous mixtures, the reverse is the case. The components are not uniformly dispersed. They are skewed to a particular side.

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Assume there is an equal mass of each gas at a given temperature and pressure. Arrange the following gases based on the amount of volume they occupy, from the largest to the smallest volume.

Answers

At a given temperature and pressure, the arrangement of gases based on the amount of volume they occupy, from the largest to the smallest volume is CH[tex]_{4}[/tex] < NH[tex]_{3}[/tex] < Ar < SO₂ < Cl₂ .

According to Avogadro's law, all gases with an identical volume and the same temperature and pressure have an equal number of molecules.

If the temperature and pressure are constant, the volume and amount (in moles) of an ideal gas for a given mass are directly proportional.

The volume of gas ∝ No. of moles of gas

It means that the more the no. of moles of gas, the greater will be the volume of gas.

Now, No. of moles = Given mass/ Molar mass

Given,

There is an equal mass of each gas at a given temperature and pressure.

So,

No. of moles is inversely proportional to the Molar mass of the gas.

Therefore we can conclude that the less the molar mass of gas, the more will be the no. of moles and the higher will be the volume of that gas.

The gas with the least molar mass will occupy the highest volume.

The molar mass of [tex]CH_{4}[/tex] = 16g/mol

The molar mass of [tex]NH_{3}[/tex] = 17g/mol

The molar mass of [tex]Cl_{2}[/tex] = 70g/mol

The molar mass of Ar = 40g/mol

The molar mass of [tex]SO_{2}[/tex] = 64g/mol

Arrangement of gases on basis of molar mass

Cl₂ < SO₂ < Ar < [tex]NH_{3}[/tex] < [tex]CH_{4}[/tex]

So Arrangement on basis of decreasing volume

[tex]CH_{4} < NH_{3} < Ar < SO_{2} < Cl_{2}[/tex]

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A measure of peak separation in a chromatographic method that equals the difference in retention time for two components divided by the average of their peak widths is the definition of

Answers

A measure of peak separation in a chromatographic method that equals the difference in retention time for two components divided by the average of their peak widths is the definition of resolution.

Retention time can be referred to as the amount of time a solute spends in the stationary and mobile phases of a column.

The analyte's interaction with the stationary phase determines the longer retention period.

The duration of retention will increase as the interaction becomes more strong.

Resolution is defined as the peak separation in a chromatographic procedure that is equal to the difference in retention time for two components divided by the average of their peak widths.

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Vanillin the flavoring agent in vanilla has a mass percent composition of 63.15 per h ,31.55per o. determine the empirical formula and molecular formula if molecular mass of vanillin is 152.15 g/mol

Answers

Empirical formula and Molecular formula:

Vanillin has the empirical formula C₈H₈O₃ and the molecular formula  C₈H₈O₃, they both are same.

What is Vanillin?

Vanillin has the chemical formula C₈H₈O₃ and is classified as an organic compound. It is an aldehyde that is phenolic. Ether, hydroxyl, and aldehyde are some of their functional groups. It is the key ingredient in vanilla bean extract.

C, H, and O are present in this compound,

Mass percent composition = Divide by their atomic mass

C = 63.15/12.0107 = 5.2578

H = 5.30/1.0079 = 5.2582

O = 31.55/16 = 1.9719  

Thus, the ratio of

carbon         :   hydrogen        :  oxygen

5.257811784 : 5.258249499 : 1.97199825

division of all numbers by the smallest we get,

2.666235523 : 2.666457488 : 1

further dividing it by 3 we get,

7.998706568 : 7.999372463 : 3

thus the ratio becomes 8:8:3

Therefore, the empirical formula is C₈H₈O₃

Empirical formula mass = (12x8) + (1x8) + (16x3)

                                       = 96 + 8 + 48

                                       = 152

n = Molecular mass of Vanillin/ Empirical formula mass

  = 152.15/152

  = 1.0009  

Since the n-value is near to 1 thus the molecular formula will also be the same.

Therefore the molecular formula = C₈H₈O₃

Note: Your question is incomplete, but most probably your full question was Vanillin the flavoring agent in vanilla has a mass percent composition of 63.15 per h ,31.55per o and 5.30%H. determine the empirical formula and molecular formula if molecular mass of vanillin is 152.15 g/mol

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When testing the temperature of catalase, what would happen if you changed the temperature using the same tube with the same catalase and hydrogen oxide mixture?.

Answers

If we change the temperature using same tube with the same catalase and hydrogen oxide mixture, the hydrogen peroxide will break into oxygen and water molecule.

What is catalase?

It is an enzyme which catalyses the decomposition reaction of hydrogen peroxide to water and oxygen.

Its function is to protect the oxidative damage by ROS

ROS is reactive Oxygen Species.

What is an enzyme?

Enzymes are made of proteins which catalyses the biological reaction.

Effect of temperature on catalase:

Increase of temperature results in the loosening of hydrogen bond and helps the catalase to decompose hydrogen peroxide.

The change in temperature using same tube with the same catalase and hydrogen oxide mixture, the hydrogen peroxide will break into oxygen and water molecule.

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What is Atom?????????? ​

Answers

An atom is a particle of matter that uniquely defines a chemical

element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

What amino acid is formed using the n-phthalimidomalonic ester synthesis when the following alkyl halides are used in the third step?.

Answers

Threre are two amino acid is formed using the n-phthalimidomalonic ester synthesis when the following alkyl halides are used in the third step -

a. leucine

b. methionine

What is Gabriel malonic ester synthesis?

A reaction that enables us to generate amino acids is the Gabriel synthesis, also referred to as the Gabriel malonic ester synthesis. We can convert primary alkyl halides into primary amines using this procedure. Remember that 19 of the 20 amino acids are actually primary amines.

Who should not take methionine?

Supplemental methionine shouldn't be used by people with the genetic condition homocystinuria type I. Methionine can become more homocysteine if you take methionine supplements without getting enough folic acid, vitamin B-6, or vitamin B-12. Your risk of heart disease could rise as a result.

What does leucine do in the body?

Leucine is an essential amino acid for protein synthesis. Additionally, similarly to other amino acids, the carbon skeleton of leucine can be used to generate ATP. However, leucine can also regulate several cellular processes such as protein synthesis, tissue regeneration, and metabolism.

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The complete question is -

What amino acid is formed using the N-phthalimidomalonic ester synthesis when the following alkyl halides are used in the third step?

a. Ch3Ch(Ch3)Ch2-Br

b. Ch3SCh2Ch2-Br

1. Explain why halogens are rarely found in native state?​

Answers

Halogens are rarely found in native state because halogens are highly reactive.  

What is Halogens ?

The group 17 elements are known as Halogen group. These elements include Fluorine, Chlorine, Bromine, Iodine and Astatine. Halogens react with metals to form salts. Halogens are non metals. Halogens are highly reactive and halogens are never found in pure form. Halogens not occur in free state.

How many valence electron are present in Halogens ?

Halogens have seven valence electrons in the outermost shell. The electronic configuration of Halogen is ns² np⁵.

Thus from the above conclusion we can say that Halogens are rarely found in native state because halogens are highly reactive.

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The graph below shows how the pH of the soil in
a farmer's field changed over a period of time.
At which point, A, B, C or D, did the farmer apply
lime to the field?

Answers

Answer:

Point B

Explanation:

From 0 - 7 on the pH scale, substances are said to be acidic. At 7, the substance is said to be neutral. From 7 - 14, substances are basic.

Lime is a basic substance. Therefore, when it is added to the soil, one should expect that the soil becomes more basic. On the graph, this should be represented by the line increasing in pH. As such, the point at which lime was added was most likely Point B.

A teacher divides her class into four groups. She assigns
each group the task of measuring the temperature of a
given object three times. The teacher already knows that
the temperature of the object is 31°C.
Based on each group's results, which group makes the most precise
measurements of the object's temperature?
A. Group A: 31.0°C, 32.0°C, 30.0°C
B. Group B: 29.5°C, 33.0°C, 31.8°C
C. Group C: 32.1°C, 31.9°C, 31.8°C
D. Group D: 29.0°C, 35.0°C, 32.0°C

Answers

The group that makes the most precise measurements of the object's temperature is Group C : 32.1°C, 31.9°C, 31.8°C. That is option C.

What is a precise measurement?

Precise measurement are those values that are gotten during a measurement which when compared are closest to the given constant value.

Precision refers to a value in decimal numbers after the whole number, and it does not relate with accuracy.

From the measurement gotten from the different groups, the results that are precise are the results of group C.

This is so because,

32.1-31 = 1.1

31.9-31 = 0.9

31.8- 31 = 0.8

All the values gotten are in decimals as stated above. Therefore, the group that makes the most precise measurements of the object's temperature is Group C.

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Which compound is not required for the oxidative decarboxylation of pyruvate to form acetyl-coa?

Answers

The compound that is not required for the oxidative decarboxylation of pyruvate to form acetyl-CoA is ATP.

What is oxidative decarboxylation?

The chemical process of oxidative decarboxylation is an oxidative process where carboxylate groups are eliminated to form CO2.

The process of oxidative decarboxylation is associated with cellular respiration, which generates ATP as a product (instead of reactant).

In conclusion, the compound that is not required for the oxidative decarboxylation of pyruvate to form acetyl-CoA is ATP.

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There are exactly 1000 m in 1 km. how many significant figures does this number have?

Answers

Answer:

There is 1 significant figure

Explanation:

In the number 1000, 1 is the only number that counts as a significant figure since the zeros are not in between two non-zero numbers, and there isn't a decimal place either.

Treatment of DCS may involve: Select one: In-water recompression. Administration of pure oxygen. Recompression in a hyperbaric chamber. Both the second and third answers are correct.

Answers

Treatment of DCS may involve Recompression in a hyperbaric chamber.

Hence, Option (3) is correct answer.

What is DCS ?

DCS is Decompression Sickness which is followed by recompression in a hyperbaric chamber. They prevent long term effects.  It is also known as generalized barotrauma. It occur mostly in Scuba divers.

What are the Sign and Symptoms of DCS ?

The sign and symptoms of DCS are

Skin itchShortness of breathA blotchy rashPain in joints or armDizziness

Thus from the above conclusion we can say that Treatment of DCS may involve Recompression in a hyperbaric chamber.

Hence, Option (3) is correct answer.

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Identify all resonance forms of the enolate formed, and indicate whether or not a substantial amount of starting ketone will be present together with the enolate at equilibrium. (select all that apply)

Answers

At equilibrium, a significant quantity of starting ketone will be present with the enolate in the first case.

What is ketone?

Ketones are substances produced by the liver. It is formed when there is insufficient insulin in the body to turn sugar into energy.

What happens in scenario two where the formation of possible enolate ions from the cyclohexan-1, 4-di.ketone by abstraction of acidic proton by suing sodium ethoxide base occurs?

In this case a substantial amount of ketone will exist along side the enolate at equilibrium.


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What product is used in a pedicure bath to cleanse and soften the skin? a foot masque a foot soak massage oil cuticle remover submitnext

Answers

The product which is used in a pedicure bath to cleanse and soften the skin is foot soak

What is skin pedicure?

Skin pedicure is a special and cosmetic treatment of the body's skin including the feet and toenails, analogous to a manicure.

So therefore, the product which is used in a pedicure bath to cleanse and soften the skin is foot soak

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Half-life expressions can be derived from?

Answers

Different half-life expressions can be chemically derived from integrated rate laws.

What are integrated rate laws?

In chemistry, the expression 'integrated rate laws' makes reference to the integration of different rate laws.

The constant rate refers to the specific amount of a given substrate or reactant that is used in a chemical reaction to produce a specific amount of product during such reactions.

The constant rate is very useful to determine the time required to generate a given amount of a product in a given chemical reaction (expressed per unit of time).

In conclusion, different half-life expressions can be chemically derived from integrated rate laws.

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What amino acid residue present in the specificity pocket allows trypsin to bind to peptides containing arg or lys?

Answers

The amino acid residue present in the specificity pocket allows trypsin to bind to peptides containing arg or lys will be "Asp".

Chymotrypsin breaks down peptide bonds following side chains with a lot of mass or fragrance, like those found in the amino acids phenylalanine as well as tyrosine. The substrate-binding site, also known as the specificity pocket, contains deep and features hydrophobic side chains.

A medium-sized globular protein called trypsin, also known as serine protease 1, serves as a pancreatic serine protease. This enzyme breaks down peptides on the C-terminal portion of the amino acid sequences lysine as well as arginine to hydrolyze bonds.

Therefore, the amino acid residue present in the specificity pocket allows trypsin to bind to peptides containing arg or lys will be "Asp".

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gases are also good conductors of electricity in discharge tube at 1)high pressure high voltage 2) low pressure low voltage 3) low pressure high voltage4) neverpls help wil marks as brainliest What kind of fighting was common in the pacific during World War II Eloise bought 12 grapefruits. Each grapefruit weighed 0.52 pound.How many pounds of grapefruits did Eloise buy? Think of the latest national health trend, issue, or concern that our country is experiencing. Think of ways on how our government addresses that issue or problem. It must be in the English language using a minimum of 10 sentences. Which of the following is considered a dilute solution? Choose all that apply.Very sweet teaContact lens solutionTide pods (laundry detergent)Swimming pool water Solve the following equation. Show all work and check your answer: 5j=625? Factor the expression using the GCF100 - 80 = ??? As a little boy, Wash spotted flashes of other worlds neighborhoods where middle-class blacks like Audrey lived, and even fancier ones "over the mountain" in Mountain Brook, where his mother worked as a maid for a wealthy white family. "There would be times when we would go riding with somebody we knew that had a car. We would ride through Titusville or over to Mountain Brook. So, we knew that there was something better than the house that we lived in."How does this excerpt help readers make a personal connection to the story?by describing the appearance of Washs neighborhoodby offering information about Washs hopes for the futureby giving details about Washs mothers salaryby describing the towns of Titusville and Mountain Brook Eve takes a random sample of 100 students in her school and finds that 82% of the sample prefers band over chorus. There are 1,100 students in the school. Based on the sample proportion, how many students in the school would be expected to prefer band over chorus? 82 100 1,100 902 Yes, this is a valid inference because the 30 families speak for the whole neighborhood Yes, this is a valid inference because she took a random sample of the neighborhood No, this is not a valid inference because she did not take a random sample of the neighborhood No, this is not a valid inference because she asked only 30 families What are created during the process of translation? Question 1Which of the following can convert nitrogen in the air into a form plants can use?AbacteriaBfungiCanimalsDprotists Trapezoid KLMN has vertices K(1, 3), L(3, 1), M(3, 0), and N(1, 2).Is this trapezoid an isosceles trapezoid?Select from the drop-down menu to correctly complete the statement.Trapezoid KLMN is not an isosceles trapezoid. When the distance between two charges decreases, the electric force.Question 8 options:A. DecreaseB. Only decreased if both charges are oppositesC. IncreaseD. Only increase if both charges are positive If plebeians couldn't pay their debt they will lose the followingTheir land and their freedomTheir right to voteTheir land and their wives How many sides does a polygon with a exterior angle of 5 have? DONT DO PART C you do not need to do that one i only need help on A and B please. please help will mark braileist simplify the ratio of 55/121 Aldous McMartin was destroyed after Olive _____? The Book of Elsewhere The Shadows by Jacqueline West. a) Turned on the camping lantern b) Dumped a bucket of water on his head c) Shouted his name out loud d) clapped the silver bracelet on his wrist in which state did the anti Hindi agitation started