Which of the following elements does not form a diatomic molecule?

A. Chlorine.
B. Nitrogen.
C. Neon.
D. Hydrogen.

A. Therefore, the energy change in kilojoules to two significant figures is 580.5 kJ.
B. Therefore, the energy change in kilojoules to one significant figure is -370 kJ.
C. Therefore, the energy change in kilojoules to two significant figures is -91.6 kJ.

Part A: The energy change in kilojoules can be calculated using the equation: ΔH = ∑(nΔHf°products) - ∑(nΔHf°reactants), where ΔH is the energy change, n is the number of moles, and ΔHf° is the standard enthalpy of formation at standard conditions (298 K and 1 atm).

Using the values from the table of standard enthalpies of formation, we have:

ΔH = [2(-41.1) + 3(0)] - [2(0) + 3(-220.9)]
ΔH = -82.2 + 662.7
ΔH = 580.5 kJ

Part B: Following the same equation as Part A and using the standard enthalpies of formation:

ΔH = [4(-157.2) + 2(-285.8) + 0] - [2(0) + 2(-129.9)]
ΔH = -628.8 - (-259.8)
ΔH = -369.0 kJ

Part C: Again, using the same equation and the standard enthalpies of formation:

ΔH = [2(-121.3) + 0] - [0 + (-151.0)]
ΔH = -242.6 + 151.0
ΔH = -91.6 kJ

To learn more about energy change refer here:

https://brainly.com/question/2400395#

#SPJ11

Each water molecule is joined to Four other water molecules by Hydrogen bonds

As can be seen in the illustration on page 1 of the activity titled "The Polarity of Water" a water molecule is joined to four other water molecules by hydrogen bonds.

A hydrogen bond is an attraction between an electronegative atom carrying a single pair of electrons—the hydrogen bond acceptor—and a hydrogen atom that is covalently bonded to a more electronegative "donor" atom or group.

Learn more about Hydrogen bond here:

https://brainly.com/question/1420470

#SPJ4

Three tripeptides would be produced from the partial hydrolysis of ser-leu-gly-gly-ala. These are ser-leu-gly, gly-gly-ala, and leu-gly-gly.

When the amine and carboxylic acid functional groups in amino acids join together to form amide bonds, a chain of amino acid units, called a peptide, is formed.

Peptides are short chains of amino acids usually, containing 2-50 amino acids.

Amino acids are also building blocks of proteins but they usually contain more amino acids.

Peptides are easier to absorb by the body as they are smaller in size.

Partial hydrolysis of peptides produces a mixture of shorter peptides and some amino acids.

The partial hydrolysis of peptide ser-leu-gly-gly-ala produces three tripeptides which are ser-leu-gly, gly-gly-ala, and leu-gly-gly.

Learn more about peptides:

https://brainly.com/question/1450770

#SPJ4

Outgoing shortwave radiation depends on factors such as the angle of the Sun's rays, albedo, cloud cover, and atmospheric gases. These factors collectively determine the amount of solar radiation that is reflected, absorbed, and re-emitted by the Earth's surface, influencing the outgoing shortwave radiation.

Outgoing shortwave radiation depends on several factors. Firstly, it is influenced by the solar radiation received by the Earth's surface. The amount of solar radiation reaching the Earth is determined by the angle of the Sun's rays, which changes throughout the day and across different seasons. This means that outgoing shortwave radiation will vary depending on the time of day and the time of year.

Another important factor is the albedo, which refers to the reflectivity of different surfaces on Earth. Surfaces with high albedo, such as ice and snow, reflect more solar radiation back into space, resulting in lower outgoing shortwave radiation. Conversely, surfaces with low albedo, such as dark soil and vegetation, absorb more solar radiation, leading to higher outgoing shortwave radiation.

The presence of clouds also plays a role in outgoing shortwave radiation. Clouds can either reflect incoming solar radiation back into space or absorb and re-emit it as longwave radiation. The type and thickness of clouds, as well as their altitude, can affect the amount of outgoing shortwave radiation.

Finally, atmospheric gases such as water vapor, carbon dioxide, and ozone can also influence outgoing shortwave radiation. These gases absorb and re-emit some of the incoming solar radiation, impacting the amount of radiation that escapes back into space.

Learn more about shortwave here :-

https://brainly.com/question/31450158

#SPJ11

The systematic name of the given compound is 3-methylpentanoic acid. Hence, option E is correct.

A systematic name is defined as a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are basically part of a nomenclature.

A semi-systematic name or semi-trivial name is defined as a name that has at least one systematic part and at least one trivial part, such as a chemical vernacular name.

Creating systematic names is as simple as assigning a prefix or a number to each object (in which case they are a type of numbering scheme), or as complex as encoding the complete structure of the object present in the name. Many systems combine different information about the named object with an extra sequence number to make it into a unique identifier.

Learn more about systematic name form the link given below.

https://brainly.com/question/22853454

#SPJ4

Answer:

length

Explanation:

It's the distance covered by light in one year.

6.00 M is the concentration of the stock solution.

Molarity or the molar concentration is the measure of the chemical species amount of solute in the solvent or the solution. The molarity of the solute is given by the moles and the volume in which it is dissolved.

Given,

The molarity can be estimated by:

\(\rm M_{1}V_{1} = M_{2}V_{2}\)

Substituting values in the formula:

\(\begin{aligned}1.40 \;\rm M \times 150.0 \;\rm mL &= \;\rm M_{2} \times 35.0 \;\rm mL\\\\\rm M_{2} &= \dfrac{210}{35}\\\\&= 6 \;\rm M\end{aligned}\)

Therefore, 6.00 M is the concentration of the stock solution.

Learn more about molarity here:

https://brainly.com/question/26256041

If 1 mL of diamond has a mass of 3.51 g and 1 carat = 0.200 g, cullinan diamond is of 2795.7 carats.

Given,

Volume of uncut diamond is 177mL

1mL = 3.51 gram

and 1 carat = 0.200 gram

then we have to find out weight of cullinan diamond in carats.

Cullinan diamond is of 177mL volume that means

177 × 3.51 = 621.27 grams

If 1 carat = 0.200grams

then 1 gram = 4.5 carats

621.27 grams = 621.27 × 4.5 = 2795.7 carats

Hence, cullinan diamond is of 2795.7 carats.

Learn more about Volume here:

https://brainly.in/question/609711

#SPJ9

Answer:

Sodium oxide NA2O

2) N8CL

3) HO2

4) LISO3

Answer:

Sodium oxide NA2O

2) N8CL

3) HO2

4) LISO3

Explanation:

Answer:

Didi you get it?we got the same class

Explanation:

Answer:

Explanation: Every electron has a single negative(-) charge, the addition of two electrons results in an oxygen ion with a charge of negative(−)2. This is  in fact true of every element located under oxygen in the periodic table.

P.S. hope this helps :)

A chemical that bonds to the active site of an enzyme, thus blocking its function, is known as a competitive inhibitor.

A competitive inhibitor is a type of inhibitor that binds to the active site of an enzyme, preventing the substrate from binding and blocking the enzyme's function.

The active site is the specific region of the enzyme where the substrate binds and undergoes a chemical reaction.

By occupying the active site, the competitive inhibitor competes with the substrate for binding, reducing the enzyme's catalytic activity.

The term "competitive" refers to the competition between the inhibitor and the substrate for binding to the active site.

When the concentration of the competitive inhibitor is high, it becomes more likely to bind to the active site, reducing the availability of the active site for the substrate.

However, the binding of a competitive inhibitor can be reversed by increasing the substrate concentration, as it can outcompete the inhibitor and regain access to the active site.

Competitive inhibitors are important in understanding enzyme kinetics and designing drugs that target specific enzymes.

By selectively blocking enzyme activity, competitive inhibitors can regulate biological processes and serve as potential therapeutic agents.

Learn more about inhibitors

brainly.com/question/14800463

#SPJ11

The dissociation of calcium nitrate in aqueous media leads to the formation of calcium ions and nitrate ions, which play significant roles in various chemical and biological processes.

In aqueous media, calcium nitrate (Ca(NO3)2) dissociates into ions through a process known as ionization or dissociation. The correct equation that represents this dissociation is:

Ca(NO3)2 → Ca^2+ + 2NO3^-

In this equation, the solid calcium nitrate (Ca(NO3)2) breaks apart in water to form calcium ions (Ca^2+) and two nitrate ions (2NO3^-). The (aq) notation represents the aqueous state of the ions, indicating their presence in a water solution.

The dissociation of calcium nitrate occurs because water molecules surround the ions and exert electrostatic forces, causing the compound to separate into its constituent ions. Calcium cations (Ca^2+) are formed when water molecules interact with calcium atoms, attracting away two valence electrons. Nitrate anions (NO3^-) result from the interaction between water molecules and the nitrate group.

It's important to note that the dissociation of calcium nitrate is complete in aqueous solutions, meaning that all molecules of calcium nitrate separate into individual ions. This complete dissociation is due to the high solubility of calcium nitrate in water.

The resulting calcium ions and nitrate ions are then free to participate in various chemical reactions or interact with other ions present in the solution. Calcium ions are involved in processes such as precipitation, complexation, and biological functions, while nitrate ions are essential for plant nutrition and can partake in redox reactions.

Overall, the dissociation of calcium nitrate in aqueous media leads to the formation of calcium ions and nitrate ions, which play significant roles in various chemical and biological processes.

learn more about calcium nitrate here

https://brainly.com/question/5346392

#SPJ11

The value of Ka for lactic acid is approximately 0.0303. To find the value of Ka for lactic acid, we can use the ionization percentage and the initial concentration of the acid.

Given that 2.94% of lactic acid is ionized in a 1.00 M solution, we can calculate the concentration of the ionized form (\(CH_{3}CH(OH)COO-\)) by multiplying the ionization percentage by the initial concentration of the acid: [\(CH_{3}CH(OH)COO-\)] = 2.94% × 1.00 M = 0.0294 M

Since lactic acid (\(CH_{3}CH(OH)COO-\)) is a monoprotic acid, the concentration of the undissociated form is equal to the initial concentration minus the concentration of the ionized form: [\(CH_{3}CH(OH)COOH\)] = 1.00 M - 0.0294 M = 0.9706 M

The equilibrium expression for the ionization of lactic acid can be written as: Ka = [\(CH_{3}CH(OH)COO-\)] / [\(CH_{3}CH(OH)COOH\)]

Substituting the values, we get: Ka = 0.0294 M / 0.9706 M = 0.0303

Therefore, the value of Ka for lactic acid is approximately 0.0303.

To know more about lactic acid, refer here:

https://brainly.com/question/14392019#

#SPJ11

The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.

The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.  

There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.

To learn more about temperature here

https://brainly.com/question/14995282

#SPJ4

The second option is not true of standard reduction potential. In the standard hydrogen electrode, electrons on the surface of the electrode combine with H+ ions in solution to produce hydrogen gas.

The third option is also not true as in the standard hydrogen electrode, hydrogen gas is reduced to H+ ions. The first option is true for standard reduction potential. The fourth option is also true as the standard hydrogen electrode has a reduction potential of exactly 0 V. Standard reduction potential is a measure of the tendency of a chemical species to acquire electrons and undergo reduction. It is measured relative to the standard hydrogen electrode.

The statement that is not true of standard reduction potential is: "In the standard hydrogen electrode, liquid hydrogen is combined with 1 M NaCl solution." The standard hydrogen electrode (SHE) uses a solution of HCl or other strong acid with H+ ions, not NaCl. The SHE serves as a reference electrode with a reduction potential of exactly 0 V, where hydrogen gas is oxidized to H+ ions, and electrons on the electrode's surface combine with H+ ions in the solution to produce hydrogen gas.

To know about electrode visit:

https://brainly.com/question/29667817

#SPJ11

Aldehydes that contain at least one alpha hydrogen atom can undergo Aldol condensation and Cannizzaro reaction.

As per the question given,  

In Aldol condensation, two aldehyde or ketone molecules react in the presence of a base to form a beta-hydroxy carbonyl compound. The reaction involves the removal of a water molecule from the alpha-carbon and carbonyl group of two aldehydes or ketones. This reaction produces Aldol, which can undergo dehydration to form an alpha-beta-unsaturated carbonyl compound.

On the other hand, in the Cannizzaro reaction, an aldehyde molecule undergoes self-oxidation and reduction in the presence of a strong base to give an alcohol and a carboxylic acid. The reaction involves the loss of a hydrogen atom from the aldehyde, which gets reduced to an alcohol, and the reduction of the other aldehyde molecule to a carboxylic acid.

Therefore, aldehydes containing at least one alpha hydrogen atom can undergo Aldol condensation and Cannizzaro reaction.

For such more questions on Aldol condensation

https://brainly.com/question/27178362

#SPJ4

3.56 grams of water will react with 1 mole of nitrogen dioxide (NO2). Therefore, 3.56 grams of water will react with 0.051 moles of nitrogen dioxide (NO2).

When nitrogen dioxide (NO2) reacts with water, it forms nitric acid (HNO3). The reaction equation is:

2NO2 + H2O → HNO3 + NO

The reaction is exothermic, so it releases energy in the form of heat. This can lead to an increase in temperature and pressure if the reaction is carried out in an enclosed container.

The rate of the reaction is affected by several factors, including temperature, pressure and the concentration of the reactants. Increasing the temperature and pressure can speed up the reaction, but this can also lead to a decrease in the reaction's efficiency.

Learn more about Nitric acid:

https://brainly.com/question/22698468

#SPJ4

Answer:

Saturn's rings are made up of ice, dust, rocks, moons and other satellite that orbit the gas giant as its equator, where gravity is strongest.

Explanation:

A circumpolar animal dwells at the poles.

Animals are found in different areas. The areas that are inhabited by an animal is called the habitat of the animal. Different animals have different habitats.

However, the animals that are found around the poles are said to be circumpolar. In nutshell, a circumpolar animal dwells at the poles.

Learn more about habitat: https://brainly.com/question/7038386

The Correct answer is Option B) Sulfur. This is the element in pyrite that contributes to acid mine drainage.

One ingredient that should never be ignored is sulphur(S). Group 16 of the periodic table is where Sulphur is located. It is obtained as a byproduct following the manufacturing of natural gas and is non-metal. It is a bright yellow colour and has a terrible smell (like rotten eggs). Sulfur has been consumed by people for a thousand years despite its apparent physical characteristics. Why? Considering that you might just come across it on the ground.

Sulfur is a straightforward element to locate both on the ground and in the periodic table. It occupies the sixteenth position, immediately below oxygen (O). Sulfur is typically found as crystal and has a yellowish color when it occurs naturally.

To learn more about Sulphur visit:

brainly.com/question/15654465

#SPJ1

Answer:

NaOH

Explanation:

Sodium hydroxide is the base in the acid-base reaction as all other acids and sodium chloride is salt and water is neutral.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

Learn more about base,here:

https://brainly.com/question/12445440

#SPJ3

The sum of all an object's atoms and molecules' energies makes up the substance's total energy.

To learn more about energy  refer to:

https://brainly.com/question/13881533

#SPJ1

The gas should not subjected to excessive pressure and that fire extinguishers are always handy.

The Haber process is the process that could be used for the production of ammonia gas. The process involves the bringing together of the hydrogen and the oxygen gas under pressure. We know that this reaction is favored when the pressure is increased and the temperature is lowered. The temperature has to be lowered because the process is an exothermic reaction and could only move forward at lower temperature.

The word exothermic means that heat is given out in the process. The heat of the reactants is greater than the heat of the products. We know that risk of explosion is greater for an exothermic gas under pressure.

Given that methane is a highly combustible gas and it is transported under pressure, we must ensure that the gas is not subjected to excessive pressure and that fire extinguishers are always handy.

Learn more about haber process:https://brainly.com/question/26667299

#SPJ1

Answer:

The answer is C2H4O2

The inert component of the Standard Hydrogen Electrode (SHE) is platinum metal.

So, the correct answer is C.

The SHE is a reference electrode that is used to measure the potential of other electrodes in electrochemical cells. The platinum metal serves as a catalyst for the reduction of hydrogen ions in the half-reaction at the electrode.

The half-reaction involves the reduction of hydrogen ions to hydrogen gas, which is why hydrogen gas is also present in the electrode. However, the hydrogen gas is not the inert component, as it is directly involved in the reaction. The presence of platinum metal ensures that the reduction of hydrogen ions occurs efficiently and reproducibly, making it an important component of the SHE.

Hence, the answer of the question is C.

Learn more about SHE at https://brainly.com/question/31597945

#SPJ11

Answer:

Platinum metal

Explanation:

In the SHE, elemental platinum (a transition metal) is used as a reactive surface; it does not actually participate in a redox reaction in the cell.

Answer:

yes, animals are a natural resources

Answer:

Fermentation is a metabolic process in which an organism converts a carbohydrate, such as starch or a sugar, into an alcohol or an acid. For example, yeast performs fermentation to obtain energy by converting sugar into alcohol.

Sometimes bacteria perform fermentation, converting carbohydrates into lactic acid...

You can look up videos of yeast fermentation in apple juice.