how many tripeptides can be formed from these three amino acids if each is used only once in the structure

Answer:

The hydroxide ion concentration in an aqueous solution, [OH-], in mol L-1, can be calculated if the pOH of the solution is known.

pOH is defined as the negative logarithm (to base 10) of the hydroxide ion concentration in mol L-1 pOH = -log10[OH-]

Explanation:

Answer:

you would expect 0 radioactive nuclei to be present

Explanation:

got it right on the assignment

The Ksp for BaCrO4 is 1.17×10^-10

The equation for the dissociation of BaCrO4 in water is:

BaCrO4(s) ⇌ Ba2+(aq) + CrO42-(aq)

The Ksp expression for this reaction is:

Ksp = [Ba2+][CrO42-]

At equilibrium, the molar solubility of BaCrO4 is equal to the concentration of Ba2+ and CrO42-. Therefore, we can substitute 1.08×10^-5 m for both [Ba2+] and [CrO42-] in the Ksp expression:

Ksp = (1.08×10^-5)² = 1.17×10^-10

Therefore, the Ksp for BaCrO4 is 1.17×10^-10, expressed using three significant figures.

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False, hydrogen bonds do play a role in protein structure, but they do not link individual amino acids together.

Hydrogen bonds are a type of chemical bond that occur when a hydrogen atom with a partial positive charge is attracted to an electronegative atom, such as nitrogen, oxygen, or fluorine, with a partial negative charge.

This attraction results in a weak bond between the two atoms, with the hydrogen atom acting as a bridge between the two electronegative atoms.

Hydrogen bonds play an important role in many biological processes. For example, they help to stabilize the three-dimensional structure of proteins and nucleic acids, such as DNA and RNA. They also play a role in the properties of water, such as its high boiling point and surface tension.

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More than 40 compounds in tobacco and tobacco smoke are option D: carcinogens.

The U.S. Food and Drug Administration created a list of dangerous and possibly toxic components in tobacco smoke and unburned tobacco in 2012; 79 of these substances are regarded as carcinogens. All tobacco products contain nicotine, a highly addictive substance that may be found in the tobacco plant itself.

While nicotine makes people addicted and keeps them using tobacco products, it is not the cause of the extreme danger associated with tobacco use. Numerous compounds are found in tobacco and tobacco smoke. It is this concoction of chemicals, not nicotine, that renders tobacco smokers susceptible to fatal illnesses.

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The specific heat capacity of liquid water is 4.18 J/g °C. The quantity of energy required to heat 1.50 g of water from 26.5°C to 83.7°C is 359 J.

The specific heat of a substance is defined as the heat required to raise a temperature of a substance by 1°C. In other words, it is also referred as a mass heat capacity.

The quantity of energy for a substance is calculated as

q=m×c×ΔT

Where ΔT=(T_f-T_i)

T_f=83.7°C, T_i=26.5°C

ΔT=(83.7-26.5)°C=57.2°C

And c=4.18 J/g °C

m=1.50g

Substitute all the values in the formula

q=1.50g×(4.18 J/g°C)×57.2°C

q=358.644 J

q=359 J

Therefore, the heat required for 1.50g of water is 359 J.

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The statement best describes what Granger believes to be the major difference between man and the phoenix: that the phoenix recognizes when they have made a mistake and eventually will learn not to repeat it. Meanwhile, although a man recognizes his fault, he will continue to repeat them.

What does Granger say about the men and phoenix comparison?

Phoenix is a mythological creature that would burn itself to death only to be reborn from the ashes. As well as humans, we tend to cyclically destroy ourselves and our societies only to build them up again. Granger hopes that eventually, men will learn the lessons from history and stop destroying society.

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Answer:

Mutualism

Explanation:

i don’t think i know

The mass of the mixture is 95.8 g and the percentage by mass of cyclohexane in the mixture is 81.33%.

To calculate the percentage by mass of cyclohexane in the mixture, you need to use the formula:

Percentage by mass = (mass of component / total mass of mixture) × 100

Given that you have a mixture of cyclohexane and water and the density of the mixture is 0.958 g/mL,

1. To determine the mass of the mixture, you need to know the volume of the mixture and the density of the mixture. Since the density of the mixture is given, you can use the following formula to determine the mass of the mixture:

mass of mixture = density of mixture × volume of mixture

The mass of the mixture is: mass of mixture = 0.958 g/mL × 100 mL = 95.8 g

2. Since the density of cyclohexane is given as 0.779 g/mL, you can use the following formula to determine the mass of cyclohexane:

mass of cyclohexane = density of cyclohexane × volume of cyclohexane = 0.779 g/mL × 100 mL = 77.9 g

3. Using the formula given above, you can calculate the percentage by mass of cyclohexane in the mixture:

percentage by mass of cyclohexane = (mass of cyclohexane / mass of mixture) × 100

percentage by mass of cyclohexane = (77.9 g / 95.8 g) × 100 = 81.33%

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a switch opens and closes an electric circuit

Answer:

See below

Explanation:

Bohr Model

well-defined circular orbits like the solar system

Quatum Mechanical Model

Electrons do not travel around the nucleus in simple circular orbits.

electron clouds around the nucleus

Answer:

7.28 mol Na2SO4

Explanation:

Since it is already in moles, all we have to do is use a molar ratio

A molar ratio is the proportions of reactants and products using the balanced equation. When writing a mole ratio, the given information must cross out with the right thing.

7.28 mol H2SO4 * 1 mol Na2SO4/1 H2SO4 = 7.28 mol Na2SO4

*notice how the H2SO4 crosses out

Answer:

No

Explanation:

ionic compounds do not conduct electricity when in solid state. ionic compounds exist only as solid under normal conditions.

The possible reaction mechanism for the acid-catalyzed hydrolysis of glycosidic bonds in an oligosaccharide.

The acid-catalyzed hydrolysis of glycosidic bonds involves the cleavage of the bond between two monosaccharide units in an oligosaccharide, resulting in the formation of individual monosaccharides.

Here is a possible reaction mechanism for acid-catalyzed hydrolysis:

1. Protonation of the glycosidic bond:

In the presence of an acid catalyst, such as HCl, the acid donates a proton (H+) to the oxygen atom of the glycosidic bond, leading to the formation of a oxonium ion intermediate.

2. Nucleophilic attack:

A water molecule acts as a nucleophile, attacking the electrophilic carbon atom of the oxonium ion. This leads to the cleavage of the glycosidic bond, breaking the bond between the two monosaccharide units.

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Among the given weak bases, aniline is the weakest electrolyte in an aqueous solution.What is an electrolyte?An electrolyte is a substance that conducts electricity in an aqueous solution or in a molten state.

In water, they break up into ions and conduct electricity. Electrolytes may be categorized into two types: strong and weak electrolytes. Strong electrolytes dissociate completely into ions in aqueous solution, whereas weak electrolytes only partially dissociate into ions and exist in equilibrium with undissociated molecules. In the given weak bases, aniline is the weakest electrolyte.

Here's how to solve the problem: Aniline has a Kp of 4.0 × 10-10, which is the smallest value of Kp among all the given weak bases. Therefore, aniline is the weakest electrolyte in an aqueous solution.

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Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of silver = 0.25 cm³

density = 10.5 g/cm³

The mass is

mass = 10.5 × 0.25 = 2.625

We have the final answer as

Hope this helps you

Explanation:

Antoine-Laurent de Lavoisier, Johann Wolfgang Döbereiner, John Newlands, Julius Lothar Meyer, Dmitri Mendeleev, Glenn T.

Answer:

maybe 200g

I don't know thats just a guess

HOPE ITS TURE

Taking into account the reaction stoichiometry, 51.84 grams of HCl is required to react completely with 12.8 g of aluminum to produce aluminum chloride and hydrogen gas.

In first place, the balanced reaction is:

2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 54 grams of Al react with 218.7 grams of HCl, 12.8 grams of Al react with how much mass of HCl?

\(mass of HCl=\frac{12.8 grams of Alx 218.7 grams of HCl}{54 grams of Al}\)

mass of HCl= 51.84 grams

Finally, 51.84 grams of HCl is required to react completely with 12.8 g of aluminum to produce aluminum chloride and hydrogen gas.

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There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, it was unable to diffuse through the 20 MWCO membrane.

Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution. There are two types of mixture that is homogeneous and heterogeneous. Solution is a homogeneous solution.

Lee molecular weight of urea is 60.07 . It was unable to diffuse through the 20 MWCO membrane due to urea being unable to fit through the pores of the membrane.

Therefore, it was unable to diffuse through the 20 MWCO membrane.

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Answer: 10=14 1=t6

Explanation:

Answer:

Acid Rain

Explanation:

Because it was even the main reason for discoloration of Taj mahal over years.

Hope it was helpful !

Less chemical waste is generated because there are no solvents to remove. The reaction often costs less because solvents can be expensive.

The reaction rate is greater because the concentration of reagents is greater. These options are correct.

A solvent is a substance that dissolves a solute, producing a solution. In addition to being a liquid, a supercritical fluid, a solid, or a gas can also be solvent. All the ions and proteins in a cell are dissolved in water, which is a solvent for polar molecules and the most frequent solvent employed by living things.

chemical reaction, the transformation of one or more chemicals (the reactants) into one or more distinct compounds (the products). Chemical elements or chemical compounds make up substances. In a chemical reaction, the atoms that make up the reactants are rearranged to produce various products.

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Answer:

Wavelength (λ) = 1.875 × 10⁻⁶ m

Explanation:

Given:

Energy (e) =  1.06 × 10⁻¹⁹ J

Find:

Wavelength (λ) = ?

Computation:

e = hc / λ

λ = hc / e

where c = 3 × 10⁸

Planck's constant (h) = 6.625 × 10⁻³⁴

So,

Wavelength (λ) = (6.625 × 10⁻³⁴)(3 × 10⁸) / (1.06 × 10⁻¹⁹)

1. Wavelength (λ) = 1.875 × 10⁻⁶ m

2. Given n = 4 to n = 3 both are integer not fraction so, electron is quantize

Answer:

Explanation:

Abundance means: a very large quantity of something. but in chemistry the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million.

I don't think the abutencies have an effect because I can't find anything.

Hope this helps :D

According to the concept of solubility,  the minimum volume of water in dm³, at 30 °C, needed to dissolve 1989 kg sodium chloride is 5525 liters.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.

Volume of water required is calculated by formula, mass of sodium chloride/solubility×100=1989000/36×100=5525 liters.

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Among the given options, SO2, SO3, and SO32- can exhibit delocalized bonding.

Delocalized bonding is a type of bonding where the electrons are not localized between two atoms but rather are shared among multiple atoms in a molecule. This type of bonding is characterized by the presence of resonance structures and is commonly observed in molecules that contain pi bonds.

SO2 has a bent structure with a lone pair of electrons on the sulfur atom. The double bond between sulfur and oxygen involves the overlap of a p orbital on sulfur and a p orbital on one of the oxygen atoms. This results in a pi bond and a sigma bond. The pi electrons are delocalized between the sulfur and oxygen atoms, and resonance structures can be drawn to show the delocalization.

SO3 has a trigonal planar structure with all three sulfur-oxygen bonds being identical. The sulfur atom in SO3 uses its three 3p orbitals to form three sigma bonds with the three oxygen atoms. The remaining 3p orbital on sulfur overlaps with the p orbitals on the three oxygen atoms to form three pi bonds. The pi electrons are delocalized over all three sulfur-oxygen bonds.

SO32- has a resonance structure in which the negative charge is delocalized over the sulfur and two oxygen atoms. The two sulfur-oxygen double bonds can be described as a combination of one strong sigma bond and one weaker pi bond, resulting in the delocalization of electrons over the sulfur-oxygen bonds.

In summary, SO2, SO3, and SO32- can exhibit delocalized bonding due to the presence of pi bonds and the ability to form resonance structures.

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