draw a stepwise mechanism for the following reaction

Answer:

no of moles = mass / molar mass

so if mass is a constant.

there is indirect relation between no of moles and moler mass

by Inc. molar mass....... no of moles Dec.

and vice versa

Answer:

Middle

Explanation:

Transition metals are located in the middle of the Periodic table from group 3 to group 11.

Hope this helped!

- profparis

All electrons are alike regardless of the atomic element. All protons are alike regardless of the atomic element. Both are correct.

A chemical compound that cannot be converted into another chemical substance is known as an element. Atoms are the fundamental building blocks of chemical elements. Each chemical element is identified by the atomic number, or the quantity of protons in its atoms' nucleus. For instance, the atomic number 8 of oxygen indicates that each oxygen atom's nucleus has 8 protons. As opposed to chemical compounds and mixes, which include atoms with multiple atomic numbers, this is not the case. Chemical elements make up the majority of the universe's baryonic stuff. All electrons are alike regardless of the atomic element. All protons are alike regardless of the atomic element.

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For the enzyme Pyruvate Kinase, the correct allosteric effector(s) and their effects are as follows:

a. ADP (positive): ADP acts as a positive allosteric effector, meaning it enhances the activity of Pyruvate Kinase. When ADP levels are high, it indicates a low energy state in the cell, and Pyruvate Kinase is activated to increase the production of ATP through glycolysis.

b. ATP (negative): ATP acts as a negative allosteric effector, meaning it inhibits the activity of Pyruvate Kinase. When ATP levels are high, it signals a sufficient energy supply in the cell, and Pyruvate Kinase is inhibited to prevent excessive ATP production.

c. Glucose-6-phosphate (negative): Glucose-6-phosphate acts as a negative allosteric effector, inhibiting the activity of Pyruvate Kinase. The presence of glucose-6-phosphate indicates an abundance of glucose in the cell, and Pyruvate Kinase is downregulated to prevent excessive glycolysis.

d. Covalent Phosphate group (negative): The presence of a covalent phosphate group on Pyruvate Kinase also acts as a negative allosteric effector, inhibiting its activity. Phosphorylation of Pyruvate Kinase typically occurs in response to hormonal signals, indicating the need to downregulate glycolysis.

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High-energy molecules contain one or more high-energy bonds, which store energy that can be released through hydrolysis. Hydrolysis is a chemical reaction that involves the breaking of a molecule with the addition of water. When high-energy bonds are hydrolyzed, the reaction is accompanied by a decrease in free energy.

During hydrolysis, the high-energy bond in the molecule is broken, releasing energy. This energy is used to form new bonds with the water molecules, resulting in the formation of new compounds. The breaking of the high-energy bond and the formation of new bonds with water molecules require energy, which leads to a decrease in free energy.

To illustrate this concept, let's consider the hydrolysis of ATP (adenosine triphosphate), which is a high-energy molecule commonly used as a source of energy in cells. When ATP is hydrolyzed, one of its phosphate groups is cleaved off, forming ADP and inorganic phosphate (Pi). This hydrolysis reaction releases energy that can be used by cells to perform various cellular processes.

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Answer:

The ball you want to submerge displaces the water occupied in the ball's volume. ... In water the concrete has a buoyancy pressure force equal to the displaced liquid's weight and weighs only 120 pounds until it reaches the surface.

Explanation:

The student may observe a decrease in the absorbance results due to the reaction having reached equilibrium and the concentrations of the species involved having changed over time.

The specific species present in the reaction will determine the rate at which the reaction reaches equilibrium. If the reaction is slow to reach equilibrium, leaving the solutions out on the lab bench for only 6 hours may not be enough time for the reaction to fully proceed and reach equilibrium. This can result in inaccurate absorbance results due to incomplete reaction.

Conversely, if the reaction reaches equilibrium quickly, leaving the solutions out for 6 hours may not have a significant effect on the absorbance results. Therefore, it is important to consider the reaction kinetics and equilibrium characteristics of the specific species present in the reaction to ensure accurate absorbance readings.

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--The complete question is, A student has prepared and mixed their solutions for an experiment, and left them on the lab bench for 6 hours before taking absorbance readings. What considerations should be made with regards to the specific species present in the reaction and how might this impact the accuracy of the absorbance results?--

Here's the balanced equation for this reaction:
C4H6O3 + H2O → 2C2H4O2.

Here, to write a balanced equation for the reaction that occurs when excess acetic anhydride is destroyed by adding water at the end of the reaction.
When acetic anhydride (C4H6O3) reacts with water (H2O), it forms acetic acid (C2H4O2). Here's the balanced equation for this reaction:
C4H6O3 + H2O → 2C2H4O2
In this balanced equation, one molecule of acetic anhydride reacts with one molecule of water to produce two molecules of acetic acid. This reaction shows that when acetic anhydride is hydrolyzed by water, it is converted into two molecules of acetic acid. Therefore, if excess acetic anhydride is destroyed by adding water at the end of a reaction, it will also be converted into acetic acid. The resulting solution will be a mixture of acetic acid and the product of the reaction that occurred before the addition of water.

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Answer:

C

Explanation:

Brainliest

I tried my best

Answer: If a pinch of mercury is consumed you will die from it so using a mercury thermometer is very unsafe if its breaks and a child consumes that mercury.

Explanation:

Don't use one

If the glass breaks and the mercury is not properly cleaned up, the little silvery ball within a mercury thermometer might be hazardous. As the mercury evaporates, it may pollute the air around and turn dangerous to both people and animals.

Children that have been exposed to mercury have lower IQs, hearing impairments, and worse coordination.

Long-term exposure worsens and exacerbates symptoms, which may lead to personality changes or even coma.

Mercury thermometers can be replaced by a number of things:

These non-mercury fever thermometers are significantly safer and equally accurate as mercury thermometers.

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Answer:

it have been already balanced

2H2 + O2 = 2H2O.

The frequency of yellow light, which has a wavelength of 5.56 x 10^-7 m is  5.40 x 10^14 Hz. Therefore, option B is correct.

The distance between identical points (adjacent crests) in adjacent cycles of a waveform signal propagated in space or along a wire is defined as the wavelength. This length is typically specified in wireless systems in meters (m), centimeters (cm), or millimeters (mm) (mm).

The wavelength is the distance between two wave crests, and it is also the distance between two wave troughs. The frequency is measured in cycles per second (Hz) and is the number of vibrations that pass over a given spot in one second (Hertz).

Speed is distance over time, Therefore, v = λ / T.

The frequency, f, is 1/T, so the equation relating wave speed, frequency, and wavelength is v = c / λ .

Given :

Wavelength = 5.56 x 10^-7 m

Frequency = ?

Speed (c) = 3 × 10⁸m/s

v = c / λ

By substituting given values in equation and we get,

v =  3 × 10⁸ / 5.56 x 10^-7

= 5.40 x 10^14

The frequency of yellow light is 5.40 x 10^14.

Thus, option B is correct.

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a) Both bowls would experience evaporation

2) There would be more evaporation form the bowl that was placed under the sun.

We have to recall that when we talk about evaporation, we mean that liquid is lost from the surface when exposed to sunlight. Why is the liquid lost? The reason for the loss of the liquid is that energy is being suppplied to the liquid and this is going to lead to  the breakage of the intermolecular bonds that is holding the molecules of the liquid.

When that occurs, we would notice that the most energetic of the liquid molecules would begin to escape from the solid as a vapor of the liquid which may later condense on a surface.

Water would evaporate from  the two dishes but the evaporation would be seen to more rapid in the bowl that is placed under the sun than in a shade.

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Answer:

Two

Explanation:

In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products.

Answer: 2 it has two

Explanation:

Answer:

MASS

Explanation:

Formula for heat energy will be;

Q = mcΔt

Where;

m is mass

c is specific heat capacity

ΔT is change in temperature

Now, since both substances are copper, it means they will have the same specific heat capacities.

Thus, from the formula given earlier, it is seen that the mass is inversely proportional to the temperature change.

This means that the smaller the mass, the greater the temperature change.

Thus, the 3 g sample of copper will experience a greater temperature die to its smaller mass

0.22 moles of gas exist in the container and the molar mass of the gas is 15g/mol.

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                                PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Mass = 3.28g

Volume = 6.22 L

Temperature = 378K

Pressure = 845 mm Hg

PV = nRT

845 × 6.22 = n × 62.36 × 378

number of moles = 0.22 moles

Moles = mass / molar mass

Molar mass = mass / moles

= 3.28 / 0.22

= 15 g/mol

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The average atomic mass of the atom that has the following isotopes in the following abundances: 20 10Z 30% , 19 10Z10% , 18 10Z 60% is 18.7.

The average atomic mass of an isotopic element is the weighted average of the atomic masses of the naturally occurring isotopes of an element.

According to this question, the atom has the following isotopes in the following abundances: 20 10Z [30%] = 30/100 × 20 = 6

19 10Z [10%] = 10/100 × 19 = 1.9

18 10Z [60%] = 60/100 × 18 = 10.8

The sum of these masses is the average atomic mass and is calculated as follows:

6 + 1.9 + 10.8 = 18.7

Therefore, the average atomic mass of the atom that has the following isotopes in the following abundances: 20 10Z 30% , 19 10Z10% , 18 10Z 60% is 18.7.

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Answer:

No, it is not an example of a mutation.

Explanation:

Mutations occur in the chromosomes of the organism, in this case the fly. A mutation is a permanent alteration in the DNA of the fly. Therefore, if the fly were to have purple wings when it was born then it would be a mutation. However, in this case we dyed the wings of the fly purple. This does not alter or change the DNA in any way to cause a mutation.

Hope this helps!!

- Kay

The ion that is likely present in the solution when a deep-blue color appears upon adding NH3(aq) is Cu2+.

When NH3(aq) is added to an aqueous solution, a deep-blue color usually appears due to the formation of a complex ion. The ion that is present in the solution depends on the metal ion present in the solution.

In the case of copper (Cu2+), adding NH3(aq) to an aqueous solution containing Cu2+ ions forms a deep-blue complex ion known as [Cu(NH3)4]2+.This complex ion is responsible for the observed blue color.

On the other hand, adding NH3(aq) to an aqueous solution containing Fe2+ ions forms a pale green complex ion known as [Fe(NH3)6]2+. This complex ion is not responsible for a deep-blue color.

Adding NH3(aq) to an aqueous solution containing Fe3+ ions forms a reddish-brown complex ion known as [Fe(NH3)6]3+. This complex ion is also not responsible for a deep-blue color.The ion Se is not known to form a deep-blue complex ion with NH3(aq).

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Answer:

CoHOS

Explanation:

______________% Co

_______________% H

----------------------------% O

------------------------------% S

You know im wrong but eh....

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{2.41 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 4.00322...\)

We have the final answer as

Hope this helps you

Pectin's ability to improve texture, stability, and flavor makes it a valuable ingredient in many processed foods and beverages. The correct answer is "All of the answers are correct".

Pectin is a complex carbohydrate that is commonly found in fruits and vegetables. It is widely used in the food industry as a thickening agent, stabilizer, and gelling agent.

One of the key benefits of pectin is its ability to improve the texture of processed foods and beverages.

For example, when added to frozen products, pectin can help to control the size of ice crystals that form during the freezing process. This helps to prevent the formation of large ice crystals that can cause the product to become icy or gritty in texture.

Pectin can also help to prevent the loss of syrup during the thawing process, which helps to maintain the product's overall texture and flavor.

In addition, pectin can be used to evenly distribute added substances such as fruit pieces, nuts, or chocolate chips throughout a product. Without pectin, these substances would tend to sink to the bottom of the product, resulting in an uneven texture and flavor.

Finally, pectin can also be used to increase the viscosity of liquids, making them thicker and more stable. This is particularly useful in products such as fruit juices and jams, where a thicker, more spreadable consistency is desired.

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Answer:

Option A.

Explanation:

Probability is expressed in percent, fraction or in whole numbers

The only one that does not express a probability is 25.

A one in four chance, a fifty percent chance, a three in four chance. These all could be probabilities.

25 doesn't express a probability.

If this is incorrect, please, don't refrain to tell me.

Answer:

43.84 g/mol

Explanation:

We use the ideal gas law to find the number of moles of gas present.

So PV = nRT where P = pressure of gass = 0.757 atm, V = volume of gas = 220 mL = 0.22 L, T = temperature of gas = 25 °C = 273 + 25 = 298 K and R = molar gas constant = 0.082 L atm mol⁻¹K⁻¹.

So, n = PV/RT = 0.757 atm × 0.22 L/(0.082 L atm mol⁻¹K⁻¹ × 298 K) = 0.16654 L atm/24.436  L atm mol⁻¹ = 0.00682 mol.

Since mass of gas m = 0.299 g

and n = m/M where M = molar mass of gas

So, M = m/n

\= 0.299 g/0.00682 mol

= 43.84 g/mol

So, the molar mass of the gas is 43.84 g/mol

Answer:

It has a fixed volume it can also be compressed

Explanation:

1: A gases molecules don't move slow because they are not solid and are not compacted.

Answer:

It can be compressed

Explanation:

The Properties of Gases. Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.