identify the following amino acids and their 3-letter and 1-letter abbreviations.

Answer:

m = 1.5 gram

Explanation:

Given that,

Density of protein gelatin, d = 3 g/L

The volume of protein gelatin, V = 0.5 L

We need to find the mass of the protein gelatin. The density of an object is given by :

d = m/V

Where

m is mass

\(m=d\times V\\\\m=3\ g/L\times 0.5\ L\\\\m=1.5\ g\)

So, the required mass is 1.5 gram.

A. 150 mL of 0.20 M NaOH must be added to reach the third equivalence point. and 100 mL of water should be added to 10.0 mL of 9.0 M HCl so that it has the same pH as 0.90 M acetic acid.

Volume is the amount of three-dimensional space occupied by an object. It is often measured in cubic units, such as meters cubed (m3) or liters. Volume is an important property in mathematics and physics, as well as in everyday life. It is used to measure the size of objects, the amount of a substance that fits into a container, and the capacity of a container.

This can be done using the molarity of the solution and the volume of the sample:
Moles of \(H_3PO_4\) = 0.10 M × 0.100 L = 0.0100 mol

Since the third equivalence point is when three moles of base have been added for every one mole of acid, we must add three times the amount of base as the number of moles of acid:

Moles of NaOH = 3 × 0.0100 mol = 0.0300 mol

To calculate the volume of base to add, we can use the molarity of the base and the number of moles of base:

Volume of NaOH = 0.0300 mol / 0.20 M = 0.15 L = 150 mL

Therefore, 150 mL of 0.20 M NaOH must be added to reach the third equivalence point.

2. Since we are trying to make the pH of 0.90 M acetic acid and 9.0 M HCl the same, we can set the two Henderson-Hasselbalch equations equal to each other and solve for [HA] (the concentration of the acid):

pKa + log([A-]/[HA]) = pH

pKa + log(0.90 M/[HA]) = pH

pKa + log(0.90 M/[HA]) = 4.75

log(0.90 M/[HA]) = 4.75 - pKa

log(0.90 M/[HA]) = 4.75 - 4.76 = -0.01

\([HA] = (0.90 M) / 10^{(-0.01)\)

[HA] = 9.0 M

Therefore, we need to add enough water to 10.0 mL of 9.0 M HCl so that the concentration of the acid is 0.90 M. This can be done by calculating the volume of water needed to dilute the solution to 0.90 M, which can be done using the following equation:

V₁M₁ = V₂M₂

V₂ = (V1M1) / M2

V₂ = (10.0 mL × 9.0 M) / 0.90 M

V₂ = 100 mL

Therefore, 100 mL of water should be added to 10.0 mL of 9.0 M HCl so that it has the same pH as 0.90 M acetic acid.

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The correct statement about pi-bonds in valence bond theory is: a. A carbon-carbon double bond consists of two pi bonds.

In valence bond theory, a pi bond is formed by the overlap of p orbitals in a side-by-side fashion. In a carbon-carbon double bond, there is one sigma bond formed by the overlap of sp2 hybrid orbitals and two pi bonds formed by the overlap of unhybridized p orbitals.

The pi bonds are formed above and below the sigma bond and are responsible for the double bond's unique properties, such as restricted rotation. Therefore, option A is the correct statement. Option b is incorrect because pi bonds are generally weaker than sigma bonds due to the less effective overlap of p orbitals.

Option c is also incorrect because pi bonds do not restrict rotation around the carbon-carbon axis; it is the sigma bond that restricts rotation.

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The calculated density of the benzene is in agreement with the tabulated value

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can determine the density of the benzene. Detail below

From the question given above, the following data were obtained:

Density = mass / volume

Density of benzene = 21.95 / 25

Density of benzene = 0.878 g/mL

Thus, the density of the benzene is 0.878 g/mL

Thus, the calculated density is in agreement with the tabulated density

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The concentration of the solution prepared from 50. g nacl and 2.5 l of water will be  2 %.

The proportion of the mass of the solute contained in a solution to the volume of the solution in its entirety is known as the mass/volume percent. The given proportion should be multiplied by 100 because this sort of concentration has been represented as a percentage.

The calculation if concentration is shown as:

It can be calculated by mass percent formula:

% (m/v) NaCl = Mass of NaCl / Total mass × 100 %

% (m/v) NaCl = 50 gram / 2500 × 100 %

%  (m/v) NaCl = 2 %.

Therefore, the concentration of the solution prepared from 50. g nacl and 2.5 l of water will be  2 %.

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Answer:

Half-life = 28.8 years

Explanation:

The radioactive decay of an atom follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] is actual amount of isotope after time t; k is decay constant and [A]₀ initial amount of isotope

Solving for k:

Ln[0.393g] = -k*10yrs + ln[0.500]

-0.2408 = -k*10yrs

0.02408yrs⁻¹ = k

Half-life, is:

Half-life = ln 2 / k

Half-life = ln 2 / 0.02408yrs⁻¹

Half-life = 28.8 years

The isotope \(38Sr^{90}\) is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

Formula:

radioactive decay follows first-order kinetics,  

k = \(\frac{1}{t}ln\frac{a}{x}\)

Given:  

a = initial amount = 0.5 g  

x = amount of isomer after 10 years = 0.393 g  

t= time   = 10 years

Solution:  

k =  \(\frac{1}{10}ln\frac{0.5}{0.393}\)

   = 0.02408  

k = \(\frac{0.693}{t/2}\)  

T(1/2) = half-life time

= \(\frac{0.693}{k}\)

=   \(\frac{0.693}{0.02408}\)

= 28.78 years.

Thus, The isotope \(38Sr^{90}\) is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

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The species that reacts most readily with propane is Br•, which is a bromine radical. This is because radicals are highly reactive species that have unpaired electrons, making them very eager to participate in chemical reactions.

In the case of propane, Br• can abstract a hydrogen atom from the molecule, forming a bromine-substituted propane molecule and a propane radical. This reaction is an example of a radical chain reaction, where one radical can initiate a reaction by reacting with a stable molecule to form a new radical, which can then react with another molecule, and so on. In contrast, Br2 is a stable molecule and Br+ is a cation, both of which are less reactive than Br• and would therefore be less likely to react with propane.

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Explanation:

molecules NH3 = 1.47 moles x 6.02x1023 molecules/mole = 8.9x1023 molecules of NH3 (to 2 sig. figs.)

Answer:

Carbon-12 has 6 neutrons and carbon-14 has 8 neutrons.

Explanation:

Because of the number of neutron they have, they have different physical properties. Carbon-14 is considered an unstable isotope. It decays and emits radioactivity in the form of beta rays.

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Answer:2

Explanation:

8-6=2

ANSWER

The final pressure of the gas is 155mmHg

EXPLANATION

Given that:

The initial pressure of the gas is 40mmHg

The initial temperature of the gas is 77K

The final temperature of the gas is 298K

To find the final pressure, follow the steps below

In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.

Step1: Write the gas law at constant volume

Step 2: Substitute the given data into the formula in step 1 to find P2

Hence, the final pressure of the gas is 155mmHg

Answer: 1.08×10^24 atoms

Milk

Explanation:

because milk is very thick youknow here I go

In enzyme-catalyzed reactions, the relationship between substrate concentration [S] and reaction kinetics can be described using the Michaelis-Menten equation. When substrate concentration [S] is much less than the Michaelis constant (Km), the reaction follows first-order kinetics.

In this scenario, the rate of the reaction (V) is directly proportional to the substrate concentration [S]. This means that increasing [S] will lead to a linear increase in reaction rate, up to a certain point. The reason for this behavior is that at low [S], most enzyme molecules are not saturated with substrates and are available to bind and convert more substrate into product.

The Michaelis constant (Km) represents the substrate concentration at which the reaction rate is half of its maximum (Vmax). When [S] is much less than Km, the enzyme's affinity for the substrate plays a significant role in determining the reaction rate. High-affinity enzymes will have a lower Km and will exhibit faster reaction rates even at low [S].

In summary, when substrate concentration [S] is much less than Km in enzyme-catalyzed reactions, the reaction follows first-order kinetics, and the reaction rate is directly proportional to [S]. Enzyme affinity also plays a crucial role in this relationship, with high-affinity enzymes displaying faster reaction rates at low substrate concentrations.

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Answer:

99.4 Celsius

Explanation:

The equation for the work done by the combustion reaction to form 16.5g of liquid water is: w = nRTln(V2/V1)

Where w is the work done, n is the amount of gas, R is the universal gas constant, T is the temperature, and V1 and V2 are the initial and final volumes, respectively.

To calculate the work done, you first need to determine the amount of gas, n. To do this, use the equation: n = m/M

Where m is the mass of the product (in this case, 16.5g of liquid water), and M is the molar mass of water (18.02 g/mol).

Therefore, n = 16.5g/18.02g/mol = 0.9159 mol.

Next, calculate the initial and final volumes (V1 and V2) and the temperature (T).

Once you have all of this information, you can calculate the work done using the equation: w = 0.9159mol x 8.314J/K/mol x T x ln (V2/V1).

This equation gives you the work done by the combustion reaction when it forms 16.5g of liquid water.

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Answer:

Fractional distillation

Explanation:

The process of separating petroleum products into its fractions is called fractional distillation.

Fractional distillation is a method of separating a mixture of substances based on the differences in their boiling points.

Petroleum is a mixture of hydrocarbons separated in a large fractionation tower having many trays maintained at different temperatures.

As the vapor containing the petroleum mixture ascends the fractionation tower, the mixture is separated at each tray to yield the various fractions of petroleum.

Given that,

Four wooden blocks with masses of 2 kg, 5 kg, 7 kg, and 9 kg are placed on a table.

To find,

The block will have the least inertia.

Solution,

Inertia is the measure of mass of a body. It is directly proportional to the mass of the body.

The body having more mass will have more inertia. Out of four masses 9 kg block will have more inertia and 2 kg block will have least inertia.

Hence, the correct option is (a) " The block with a mass of 2 kg "

The wooden block of mass 2kg will have the least inertia.

The inertia of an object is defined as the property due to which an object continues in the existing state of rest or uniform motion in a straight line unless an external force is applied.

The inertia of an object is directly proportional to the mass of the object. Havier the object, it will be more resistant to any change in its state of motion or rest.

if we consider the same amount of force applied to all the wooden blocks of masses 2kg, 5kg, 7kg, and 9kg, it will be easiest to move the 2kg block and hardest to move the 9 kg block.

So, the block of mass 2kg has the least inertia while the block of mass 9kg has the maximum inertia among the given blocks.

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Answer:

A. the electric motor

Explanation:

A cell is a biological molecule which is the basic and functional unit of life. Cells undergo series of processes to function appropriately. ATP is an acronym for adenosine triphosphate, which is the source of energy for various cell processes.

In the given mechanical system, the electric motor provides the energy required energy to drive the system. Therefore, the electric motor has the same major function of providing energy for the system as the ATP in a cell.

Answer:

A mid-ocean ridge is an underwater mountain range, formed by plate tectonics.Mid-ocean ridges represent one of the most important geologic processes shaping the Earth

Alex and Sam's bike have more chance to get rusted tan others especially Sam.

Why are aluminum bike frames used?

Aluminum is the most popular material used for bike frames and is renowned for having a high strength-to-weight ratio, being relatively light (though often not as light as carbon fiber), and being corrosion resistant. It is a well-liked option for riders and racers on a budget because it is also fairly priced.

A titanium frame doesn't need to be protected because a thin oxide coating builds on it to prevent further oxidation. A bare aluminum frame is more susceptible to oxidation and is hence more vulnerable to salt air. Steel is quickly oxidized. Paint is required to protect steel and aluminum frames from corrosion, however with time, paint deteriorates and cracks, exposing the frame.

Since bike chains are composed of steel, they require more frequent cleaning and lubrication than they would in a dry environment. Although the superior brake and shifter components are anodised, salt air will eventually penetrate the aluminum's surface treatment.

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Answer:

weathering

Explanation:

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Answer:

Number of nesting turtles

Explanation:

The dependent variable is the Number of nesting turtles.

The lunar phase may also affect leatherback nesting visually. On clear nights when the Moon is full, visibility may be greater and the presence of tourists and egg predators may discourage turtles from emerging.

When making their way back to the ocean, sea turtles use the light of the Moon and stars to navigate. Sea turtles use the light of the Moon and stars to navigate. Artificial lighting from street lights, buildings, and flashlights on the beach can disrupt their ability to find their way back to the water

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Taking into account the ideal gas law and the definition of molar mass, the molar mass of a 3.228 g sample of a gas if it occupies 3.21 L at 298 K and 1.25 atm is 19.66 \(\frac{g}{moles}\).

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

In this case, you know:

Replacing in the ideal gas law:

1.25 atm× 3.21 L = n× 0.082 \(\frac{atmL}{mol K}\)× 298 K

Solving:

n= (1.25 atm× 3.21 L)÷ (0.082 \(\frac{atmL}{mol K}\)× 298 K)

n= 0.1642 moles

So, the number of moles in this case are 0.1642 moles.

In this case, you know:

Then, considering the definition of molar mass, it is calculated as:

\(molar mass=\frac{3.228 g}{0.1642 moles}\)

Solving:

molar mass= 19.66\(\frac{g}{moles}\)

Finally, the molar mass of a 3.228 g sample of a gas if it occupies 3.21 L at 298 K and 1.25 atm is 19.66 \(\frac{g}{moles}\).

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A tightly sealed jar will form liquid and water equilibrium but the drinking glass will not.

The liquid and water vapor establish equilibrium in a tightly sealed container but not in the drinking glass because in the tightly sealed jar, the water can't go into the atmosphere but in the drinking glass the water will evaporate.

So we can conclude that a tightly sealed jar will form liquid and water equilibrium but the drinking glass will not.

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The equilibrium concentration of HI is 1.56 x 10-5 M and the equilibrium concentration of H₂ and I₂ is 7.8 x 10-6 M.

Given: The equilibrium constant, Kp, for the following reaction is 1.80 x 10-2 at 698 K.2HI(g) → H₂(g) + I₂ (g)

When equilibrium is reached, the concentration of H₂ is found to be 2.80 x 10-3 M. Calculate the equilibrium concentration of HI and I2.

Solution: Equilibrium constant, Kp = 1.80 x 10-2 at 698 K Since the equation is 2HI(g) → H₂(g) + I₂ (g),therefore the expression for Kp is given as,

Kp = [H₂] [I₂] / [HI]²

At equilibrium,[H₂] = 2.80 x 10-3 M We are to find the equilibrium concentration of HI and I2. Let the equilibrium concentration of HI be x and the equilibrium concentration of I2 be y. Molar concentration of H₂ = 2.80 x 10-3 M Using the equilibrium constant expression, Kp = [H₂] [I₂] / [HI]²= (2.80 x 10-3) (y) / (x)²= 2.80 x 10-3 (y) / (x²)---------------------eqn1We also know that,2HI(g) → H₂(g) + I₂ (g)Initially (before the reaction begins), concentration of HI = x and concentration of H₂ and I₂ are zero. Thus, initially, H₂ = 0and I₂ = 0At equilibrium, 2HI(g) → H₂(g) + I₂ (g).

Thus, initially the concentration of HI = x-moles. Then, for every 2 moles of HI that is converted, one mole of H₂ and one mole of I₂ are produced. So, the concentration of H₂ and I₂ at equilibrium would be x/2 moles. Because, for every 2 moles of HI that is converted, one mole of H₂ and one mole of I₂ are produced.[HI] = x M[H₂] = [I₂] = x/2 M Substituting the values in the expression derived above in eqn1,Kp = 1.80 x 10-2 = 2.80 x 10-3 (y) / (x²)= 2.80 x 10-3 (y) / x²x² = (2.80 x 10-3 y) / (1.80 x 10-2)= 0.15555y / 1Substituting the value of x² in the equation 1,1.80 x 10-2 = 2.80 x 10-3 (y) / 0.15555y1.80 x 10-2 = 18.00 y / 15555y1.80 x 10-2 = y / 865.3y = 1.56 x 10-5 M[H₂] = [I₂] = x/2 = (1.56 x 10-5 M) / 2= 7.8 x 10-6 M

∴ The equilibrium concentration of HI is 1.56 x 10-5 M and the equilibrium concentration of H₂ and I₂ is 7.8 x 10-6 M.

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Answer:

A. Potential energy is stored energy

Explanation:

Answer:

A

Explanation:

i have the same question

Answer:

Metoprolol tartrate is the immediate-release version of metoprolol while metoprolol succinate is the extended-release version

Explanation:

This means that metoprolol succinate is released over time in the body leading to longer-acting effects. Metoprolol tartrate may need to be taken multiple times per day.

Answer:

It is 3

Explanation:

\({ \rm{PO _{4} {}^{3 - } }}\)