Which type of chemical linkage is used to join fatty acids to glycerol? A. an ether linkage B. a peroxide bond C. an ester linkage D. a double bond E. a peptide bond

Answer:

Explanation:

given,

velocity = 5m\s

mass = 50kg

kinetic energy = ?

therefore, we know that,

kinetic energy = 1\2 * mass * velocity^2

                        = 1\2 * 50* 5 ^ 2

                        = 1\2 * 50* 25

                         = 1\2 * 1250

                         = 625

therefore, kinetic energy is 625

HOPE IT HELPED :D

a) This gives contour length of 1.438μm.

b)  This gives an end-to-end distance of 0.027 μm.

c) This gives a value of 0.016 μm.

(a) The contour length of the linear polyethylene molecule can be calculated by multiplying the number of repeating units in the molecule by the length of each unit. The molar mass of the molecule is given as 119,980 g/mol, and the molar mass of one repeating unit of polyethylene is 28.05 g/mol. Therefore, the number of repeating units in the molecule is 4,278. The length of each repeating unit can be calculated as the sum of the lengths of the two C-C bonds and the angle between them, using the law of cosines. This gives a contour length of 1.438 μm.

(b) The end-to-end distance in the fully-extended molecule can be calculated as the contour length divided by the square root of the number of repeating units. This gives an end-to-end distance of 0.027 μm.

(c) The root-mean-square end-to-end distance according to the valence angle model can be calculated as (3/5)^(1/2) times the end-to-end distance. This gives a value of 0.016 μm.

Based on the values obtained, it can be concluded that the linear polyethylene molecule is highly elongated. Among the very large number of possible conformations, the fully-extended conformation is likely the most stable, since it allows for maximum separation between the repeating units, thereby minimizing steric interactions.

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Explain to the kids that since there is essentially no —which is required for fire—if the bag contains only pure carbon dioxide, the splint would burn out right away.

H2 - Hydrogen Pure hydrogen gas will burst into flames when a burning splint is added to it, making a popping sound. Oxygen (O2) A smouldering splint will rekindle when exposed to a sample of pure oxygen gas.

The flame goes out as a result of carbon dioxide replacing the oxygen it requires to burn (the effect). A popping sound is produced when a flame is near hydrogen because of how the gas burns.

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Answer:

This took forever T-T

Explanation:

1. The condition of the soil has a big impact on the environment. Good soil helps plants grow, supports different kinds of life, and prevents erosion. It also keeps nutrients in balance and affects the quality of water and air. If the soil is unhealthy or polluted, it can harm plants, animals, and the overall ecosystem.

2. The dodo bird is an example of a species that no longer exists. It used to live on an island called Mauritius. Sadly, people hunted the dodo bird for food and destroyed its habitat. They also introduced other animals that harmed the dodo bird's population. Because of these reasons, the dodo bird became extinct. This affected the environment because the dodo bird played a role in spreading seeds and helping plants grow.

3. The Sumatran orangutan is a species in danger of disappearing. Its biggest threats are losing its home due to forests being cut down for palm oil, illegal hunting, and being taken as pets. People are working to protect the orangutans by preserving their habitat, rescuing and rehabilitating them, and educating communities about their importance.

4. Central Park in New York City is a natural area created in 1857. It was made for people to enjoy nature in the middle of the city. People can do many outdoor activities there like walking, picnicking, and playing sports. The park is also home to various birds and animals, which adds to the city's biodiversity.

5. When a certain environment, like a forest or a desert, is damaged or in danger, it has a big impact on the whole ecosystem. Many different plants and animals depend on each other in these environments. If something harms or destroys their homes, it can lead to the loss of species, disruption of food chains, and less diversity. It can also affect important processes like water and carbon cycles, and even influence the climate. People who rely on these environments for resources and livelihoods are also affected. That's why it's important to protect and take care of these natural areas.

Answer:  Savanna, Woodland, or Grassland.

Giraffes eat new shoots and leaves, their habitat needs to have a good supply of trees -- they flock towards acacia trees in particular. Giraffes use their extremely long legs, necks and tongues to browse mainly from the thorns on the acacia tree. The tongue and the inside of the mouth are lined with tough tissue that protects against the thorns.

Entropy is a measure of the degree of randomness or disorder in a system. It increases as the number of microstates in a system increases.

Temperature is a measure of the average kinetic energy of the particles in a system. The relationship between entropy and temperature is that as the temperature increases, the entropy of a system also increases.
Now, let's consider the given reaction. As we are assuming a common temperature of n2, we can assume that temperature remains constant throughout the reaction. To determine which reaction results in an increase in entropy, we need to look at the number of particles and the arrangement of particles in the reactants and products.
If the number of particles in the products is greater than the number of particles in the reactants, then the entropy of the system will increase. Similarly, if the arrangement of particles in the products is more random or disordered than in the reactants, then the entropy of the system will also increase.

Therefore, the reaction that results in an increase in entropy is the one that has a greater number of particles or a more disordered arrangement of particles in the products than in the reactants. Without knowing the specific reactions to choose from, it is difficult to provide a definitive answer.

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Answer

a ecuación química para la reacción es: Bicarbonato sódico + vinagre = Acetato de sodio + agua + dióxido de carbono NaHCO3 + CH3COOH => CH3COO-Na+ + H2O + CO2 De la anterior fórmula, puede calcularse que una cucharadita de vinagre produce aproximadamente 1'5 gr de CO2

\(P_{solvent}\) = \(X_{solvent }\) × \(P\textdegree _{solvent}\) and

ΔP = \(X_{solute}\) ×\(P\textdegree _{solvent}\)  are the two options that correctly shows the relationships between solute concentration and solution vapor pressure.

Vapour pressure over a pure liquid as calculated using the Clausius-Claperyron equation. A solution is created when a solute is added to a pure liquid; the pure liquid that was the solute's original container is now the solvent.

Whether the solute is volatile or nonvolatile will determine how the solute affects the vapour pressure above the solution. The sole reason nonvolatile solutes lower the vapour pressure above the solution is because of the solvent molecules.

It is more difficult to combine volatile solutes that produce miscible solutions because each item has a vapour pressure, and the overall vapour pressure is the sum of all the partial vapour pressures.

A solvent plus a solute make up a typical solution. One of the most popular solvents is water, and you may see how various solutes behave in it. Non-volatile solutes, for instance, do not vaporise and release gas. Despite having a low vapour pressure, they typically have a high boiling point.

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Answer:

347.4 (19.3 mole)

Explanation:

CH4 + 2O2 = CO2 + 2H2O

1(mole) - 9.65(mole)

2(mole) - x ⇒x = 9.65*2=19.3

m=n*M ⇒ m= 19.3*(1*2+16)= 19.3*18=347.4(g)

Answer:

presence or absence of a nucleus

Explanation:

These classification of organisms into broad domains is based on the present or absence of nucleus in the cell of an organism.

The archaea are prokaryotes and they lack a distinct cellular nuclei.

Bacteria are similar to archaea but bacteria have only one RNA polymerase

Eukarya have true nucleus and membrane bound organelles .

So, the variations in their cells are used to classify organisms into the broad categories

Answer:

Scientists were unsure about the last common ancestor between apes and humans because fossils are so scarce, researchers do not know what the last common ancestors of living apes and humans looked like or where they originated.

Explanation:

The electron donor in the Zn(s) + Cu^2+(aq) —>Zn^2+(aq) + Cu(s) system is zinc (Zn) which is being oxidized. Therefore, the electron donor in this system is the reducing agent.

The reaction is exothermic as it involves a bond-forming process

when the liquids are mixed temperature of the reaction between the mixture increases.

There are small and large clusters in the mixture

The exothermic reaction involves the formation of new bonds which involves a combination of the bonds to form a new compound in our case water has hydroxy ions that bond with those of ethanol.

Mixing ethanol and water in volumetric glassware reduces the volume and increases the temperature.

The numerical example

Fill two 250 mL graduated cylinders to the line with water and ethanol pure temperature sensor shows both at room temperature. Next, move the temperature probe to an empty 500 mL graduated cylinder and pour the contents of the two smaller cylinders simultaneously and mix well.

The temperature of the mixture will rise by about 8 °C and the volume will decrease to 480 this indicates that the reaction is exothermic as the temperature rises and volume reduces

yes, clusters are present as ethanol falls between the spaces left by water as it has small molecules than that of water.

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Answer:

GIVE BRAINLIEST PLEASE!!!  Answer - 50cm^3 of oxygen

Explanation:

They need (almost) equal amounts of substance to react

hope this helps <3

Answer:

A

Explanation:

The substance is a gas because the particles far randomly arranged and far apart from each other. This happens because when a substance is a gas, particles have weak attraction to each but a lot more kinetic energy which means the they move around all the time spreading out to fill the container. If it was a solid, then all the particles would be very close together and have a fixed position and if it was a liquid then the particles would be fairly close and moving around each other but as we can see in the diagram, all the particles are far apart confirming that it is a gas.

Answer:

the answer is A beacause the other person is right :)

Explanation:

please give them brainliest

The mass of the solid is measured using a balance on and a filter paper.

Measurement is very important in the chemistry laboratory. It is often important to measure the mass of a solid which could be used to prepare a solution.

In such cases, a filter paper is placed on the balance and the mass of the paper is measured. The solid is now placed on the paper until the value reads the sum of the masses of the paper and the solid to be measured.

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two control variables of separating sand and salt​ are:

When two or more different chemical substances are combined without any chemical bonding, it creates a mixture. Solutions, suspensions and colloids are some forms that these combinations can take on while retaining the original identities of each substance.

Mixtures result from mechanical blending or mixing of elements and compounds where no other chemical change occurs thereby preserving the characteristic makeup and properties of each component substance.

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The number of half lives necessary for a given number of nuclei to decay to a specific proportion of their initial number depends on the nuclei's rate of decay. In this instance, the original number of nuclei is indicated to be 6.02x1023, while the percentage of decay is given to be 6.25%, or 0.376x1023.

We may use the equation N(t) = N_0*(1/2)t, where N(t) is the amount of nuclei at time t, N_0 is the starting quantity of nuclei, and t is the number of half lives, to calculate the necessary number of half lives.

We may solve for t by rearranging this equation, giving us t = log_2(N_0/N(t)). Using the supplied numbers as inputs, we obtain t = log_2(6.02x1023/0.376x1023), which is abbreviated to t = 5.7. As a result, it would require 5.7 half.

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The additional three groups is an amino group, another is a carboxyl group, or an R-group" or "side chain" hence the name of this subunit of proteins.

In the context of proteins, amino acids are the building blocks that combine to form proteins. Each amino acid consists of a central carbon atom (the alpha carbon) bonded to four groups: an amino group (-NH₂), a carboxyl group (-COOH), a hydrogen atom (-H), and R-group (also called as the side chain).

The R-group is the variable portion of the amino acid structure, and it differs for each of the 20 common amino acids found in proteins. The R-group can be any of a variety of functional groups, which gives each amino acid its distinct chemical properties. These R-groups can be polar, nonpolar, acidic, basic, aromatic, etc., and they influence the folding, structure, and function of the protein.

Among the three groups mentioned in the sentence (amino group, carboxyl group, and R-group), the R-group is the one that varies and gives individual amino acids their unique characteristics. The presence of different R-groups contributes to the diversity and specificity of protein structures and functions. Therefore, the subunit of proteins is named based on the specific R-group present in each amino acid.

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Answer:

yes the answer is c

Explanation:

Answer: Anion

Explanation:

The chemist made a dilute solution of Sodium nitrate and water.

Based on the given information, the chemist added 3.0 g of sodium nitrate to 1.0 L of water and stirred to make a clear and colorless solution. Then, the chemist added another 1.0 g of sodium nitrate and stirred, but the solution remained clear and colorless. From this, we can infer that the original solution was not saturated, meaning that it had the capacity to dissolve more sodium nitrate.

The additional 1.0 g of sodium nitrate did not cause the solution to become cloudy or change color, indicating that it was able to dissolve into the solution. This suggests that the original solution was likely a dilute solution, as it was able to dissolve more sodium nitrate without reaching its saturation point. A dilute solution is a solution with a low concentration of solute relative to the solvent. In this case, the solute is sodium nitrate and the solvent is water.

Therefore, we can conclude that the original solution made by the chemist was likely a dilute solution of sodium nitrate in water.

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Answer:

2-methylpropanoic acid

Explanation:

no probs chief

The necessary voltage to power the electrolysis of molten sodium chloride is 4V.

Electrolysis is the breakdown of a compound into the elements it is formed from by passing electricity through it. It is actually a chemical reaction in which one element loses electrons and the other may gain electrons. The process of electrolysis has wide applications in electroplating, metallurgical processes, production of chlorine gas, etc.

Molten sodium chloride is generally used in the production of chlorine gas and sodium metal. This molten or aqueous form of sodium chloride is also known as brine. The process is carried out in a cell called the Down's cell.

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The chlorine atoms (Cl) are attached to the first and third carbon atoms in the cyclopentane ring. The hydrogen atoms (H) are attached to the remaining carbon atoms.

To draw the expanded structural formula for 1,3-dichlorocyclopentane, we start with the basic structure of cyclopentane, which consists of a five-carbon ring. Then, we add the chlorine atoms to the appropriate carbon positions.

Here is the expanded structural formula for 1,3-dichlorocyclopentane:

 Cl

  Cl

H-C-C-H

  H

In this structure, the chlorine atoms (Cl) are attached to the first and third carbon atoms in the cyclopentane ring. The hydrogen atoms (H) are attached to the remaining carbon atoms.

The representation shows the connectivity of the atoms and the bonds between them but does not depict the exact spatial arrangement or bond angles.

The image is given below.

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The balanced chemical equation between pottasium and chlorine is as follows: 2K + Cl₂ → 2KCl. It is a combination reaction.

A chemical reaction is a process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

According to this question, a chemical reaction occurs between potassium metal and chlorine gas to form pottasium chloride as follows:

2K + Cl₂ → 2KCl

The chemical reaction is a combination reaction because it involves the combination of two elements to form a compound.

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The correct answer to the first part of your question is option (c): Energy is released by water vapor as it condenses.

When water vapor condenses into liquid water, it undergoes a phase change from a gaseous state to a liquid state. During this phase change, energy is released in the form of latent heat. This release of energy occurs because the water molecules in the vapor phase are more energetic and have higher kinetic energy compared to the water molecules in the liquid phase.

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Answer:

They show helixes and proteins

Explanation:

Ribbon diagrams are the Richardson diagrams that represent the protein structures. Chemist prefers using Ribbon diagrams to show the various structure of the proteins.

The Ribbon diagram is used to represent the structural organization of the protein in the polypeptide chains or individually. It shows the three-dimensional structure and organization of the protein framework.

The ribbon diagram for the secondary structure of the protein shows the intramolecular and intermolecular structure along with helixes and bonding. It shows the detailed structure of the protein organization including the helix and sheets.

Therefore, the ribbon diagram is used by chemists to determine the structure of the protein as they give the details about the helix and sheet.

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Answer:

See attached image.

Explanation:

The explanations are on the attachment.  The numerical results are below.

1.  63g/7cm^3 = 9 g/cm^3

2.  The m or mm must be converted so that the units are the same.  1 m = 1000 mm.  I'll convert the meters to mm:  0.080 m = 80 mm.

480 mm^2/80 mm = 6 mm

3.  L times L makes no physical sense, unless this is a new Star Wars technique for making dark matter.  Entertaining, but useless.