In the correct order, what are the three general steps in the mechanism of a claisen reaction?

Answer:

This is very easy Cuz We have 2Na2O We have O2 so thats molecule of Oxygen and its same on product We need to balance Na on start We have 1 on product We have 2 so Just put 2 at start....

Explanation:

Sorry for bad english not my first language :(

2Na+O2-->2Na20

Answer:

blank space one- 0

blank space two- 0

Explanation:

Metals on reaction with acids liberate Hydrogen gas. This is the reason why bubbles are formed in the solution.

When the metals reacts with acids the mass of the metal will decreases with the liberation of hydrogen gas . This can acts as a exception for law of conservation of mass.

The law of conservation of mass determines  that in a chemical reaction mass can  neither  be created nor destroyed. For instance , the carbon atom in coal as carbon dioxide when it is burned. The carbon atom transforms  from a solid structure to a gas but its mass doesn't  changes.

The principle states  that the mass of matter, in a closed system, will always be the same no matter what type of change  can happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination , the amount of mass will not be   change.

Learn more about law of conservation of mass:

brainly.com/question/13891351

#SPJ9

Answer:

Explanation:

Calcium chloride is deliquescent. If exposed to air, it will absorb sufficient water from the air to allow it to dissolve. After a short while, instead of a white lump, you will have a pool of clear liquid.

A pure substance f is found to change upon heating into two new pure substances m and y. Both m and y may be decomposed by chemical means. From this we may conclude that substance f undergoes a chemical reaction upon heating, resulting in the formation of two new pure substances, m and y.

The fact that both m and y can be decomposed by chemical means indicates that they are chemically distinct from each other and from substance f.

This suggests that the heating process leads to a decomposition reaction of f into m and y, where m and y are the decomposition products.

The ability to decompose m and y by chemical means implies that they are not stable compounds and can be further broken down into simpler substances or elements.

Overall, this information suggests that substance f undergoes a thermal decomposition reaction, producing two new substances that can be further broken down chemically.

To know more about chemical reaction, refer to the link :

https://brainly.com/question/29762834#

#SPJ11

Answer:

fruit punch

Explanation:

............

The correct order of reactivity towards electrophilic aromatic substitution is:

b.) Phenol > benzene > chlorobenzene > benzoic acid

Phenol is more reactive than benzene towards electrophilic substitution reactions due to the presence of the -OH group (hydroxyl group) attached to the benzene ring. The lone pair of electrons on the oxygen atom in the -OH group can donate electron density to the ring, making it more nucleophilic and facilitating electrophilic attack.

Benzene, although less reactive than phenol, can still undergo electrophilic substitution reactions due to its aromaticity and delocalized electron system.

Chlorobenzene is less reactive than both phenol and benzene because the chlorine atom is an electron-withdrawing group. It withdraws electron density from the benzene ring, making it less nucleophilic and less prone to electrophilic substitution.

Benzoic acid is the least reactive among the options given. The carboxylic acid group (-COOH) is an even stronger electron-withdrawing group than the chlorine atom in chlorobenzene. It further reduces the electron density on the benzene ring, decreasing its reactivity towards electrophilic substitution.

Therefore, the correct order of reactivity towards electrophilic substitution is option b.

learn more about Electrophilic aromatic substitution

https://brainly.com/question/31236682

#SPJ11

the complete question is:

The correct order of reactivity towards electrophilic aromatic substitution is?

a.) Benzene > phenol > benzoic acid > chlorobenzene

b.) Phenol > benzene > chlorobenzene > benzoic acid

c.) Chlorobenzene > benzoic acid > phenol > benzene

d.) Benzoic acid > chlorobenzene > benzene > phenol

Explanation:

The boiling point of a substance is 293°C.

The boiling point is the temperature at which the vapor pressure of a liquid becomes equal to the atmospheric pressure.

So, at the boiling point:

The vapor pressure =atmospheric pressure = 1 atm.

To get the vapor pressure of the substance at 220°C is definitely less than 1 atm.

Since, as the temperature increases, the vapor pressure of the liquid increases.

To determine the pH of a solution using a pH indicator paper, you need a color chart or a color scale that corresponds to different pH values.

This color chart or scale is used to compare the color of the pH indicator paper after it has been immersed in the solution. The pH indicator paper is impregnated with a universal pH indicator, which is a chemical compound that changes color depending on the acidity or alkalinity of the solution.

The indicator undergoes a chemical reaction with the hydrogen ions (H+) or hydroxide ions (OH-) present in the solution, resulting in a color change.

By comparing the color of the pH indicator paper with the color chart or scale, you can determine the approximate pH of the solution. The color chart usually provides a range of colors corresponding to different pH values, allowing you to match the observed color to the nearest pH value.

In the hypothesis mentioned, the aim is to calibrate a cabbage pH indicator using the pH values obtained from a universal pH indicator. Therefore, in addition to the pH indicator paper and color chart, you would also need a range of solutions with known pH values to establish a calibration curve specific to the cabbage pH indicator.

In summary, to determine the pH of a solution using a pH indicator paper, you need a color chart or scale that correlates the observed color of the pH indicator paper with different pH values. This chart or scale serves as a reference for interpreting the color change and determining the pH of the solution.

Know more about   hypothesis  here:

https://brainly.com/question/31293943

#SPJ8

Answer: COLOR KEY

Explanation: CS

Explanation:

I'm pretty sure the answer is D

Answer:

Valence electrons are the outermost electrons of an atom and are normally the only electrons that participate in chemical bonding. Atoms with full valence electron shells are extremely stable and therefore do not tend to form chemical bonds and have little tendency to gain or lose electrons.

1.Nuclear charge decreases as the atomic number increases.Immersive Reader

Answer - True

2.In alkali metals, the atomic radius of potassium is greater than

Answer - Lithium

3.While moving across the periodic table from left to right there is an increase in atomic radius.

Answer - False

4.When moving from gold to lead, the atomic radius increases.

Answer - True

5.The picometer is the unit used to measure atomic radii.

Answer - True

6.Which of the following is larger in atomic size?

Answer - Boron

7.Chlorine has a larger atomic radius than fluorine.

Answer - True

8.Atomic size increases across a period.

Answer - False

9.The atomic radius of a nitrogen atom is 70 pm. What is the distance between the nuclei of two bonded nitrogen atoms in a N2 molecule

Answer - 140 pm

10.Arrange the following atoms in order of decreasing atomic radius:

Ga, As, Sn, Sb, Te

Answer - a. Sn, Sb, Te, Ga, As

Thanks for joining brainly community.

Answer:

10 electrons

Explanation:

Neon 21 has 10 protons and 11 neutrons. We know that there are the same number of electrons as there are protons. so your answer is 10.

Thus, the answer is C) in (b) and (c). pH is a measure of the acidity or alkalinity of a solution. It is a logarithmic scale used to express the concentration of hydrogen ions (H+) present in a solution

The pH of an HNO2 (nitrous acid) solution of each of the following concentrations is as follows:

A) For a 0.500 M HNO2 solution:

HNO2 ⇌ H+ + NO2-

Ka of HNO2 = 4.5 × 10^-4

Since the initial concentration is relatively high, the simplifying assumption that x is small cannot be made. Thus, we need to solve the quadratic equation to find the concentration of H3O+ ions. The pH can then be calculated using the equation:

pH = -log[H3O+]

B) For a 0.110 M HNO2 solution:

The concentration of HNO2 is moderate. We can make the simplifying assumption that x is small (x << 0.110) to approximate the equilibrium concentration of H3O+ ions.

C) For a 1.10 × 10^-2 M HNO2 solution:

The concentration of HNO2 is low. We can make the simplifying assumption that x is small (x << 1.10 × 10^-2) to approximate the equilibrium concentration of H3O+ ions.

D) Based on the concentrations given:

The simplifying assumption that x is small can be made for solutions with concentrations less than about 0.05 M. Therefore, in case B (0.110 M HNO2) and case C (1.10 × 10^-2 M HNO2), the assumption can be made.

Learn more about pH here :-

https://brainly.com/question/30656928

#SPJ11

Avogadro's number (6.02*1023) of something is defined as 1 mole. So one mole of sulfur (or any other element) equals 6.02*1023 atoms. 4.56 moles is only 4.56 times as much.

To learn more about atoms, refer to:

https://brainly.com/question/6258301

#SPJ4

Answer:

In chemistry, a precipitate is an insoluble solid that emerges from a liquid solution. The emergence of the insoluble solid from solution is called precipitation. Often the precipitate emerges as a suspension. Precipitates can form when two soluble salts react in solution to form one or more insoluble products.

Explanation: Hope this helps! :>

Answer:

I'm sorry, but I cannot see the observations or the data table you mentioned in your question. However, I can still provide you with some general guidance on how to approach the calculations and answer the questions based on the given information.

4. To calculate the concentration of the NaOH solution, you need to know the mass of NaOH used and the volume of the solution. The formula to calculate concentration is:

Concentration (in mol/L) = (Mass of NaOH (in grams) / molar mass of NaOH) / Volume of solution (in L)

Make sure to convert the mass of NaOH to moles by dividing it by the molar mass of NaOH. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H).

5. The balanced equation for the neutralization reaction between NaOH and HCl is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

(aq) represents an aqueous solution, and (l) represents a liquid.

6a. To calculate the average concentration of HCl in the sample from site B, you need to know the volumes and concentrations of the NaOH and HCl solutions used in the titration. Use the formula:

Concentration of HCl (in mol/L) = (Volume of NaOH solution (in L) * Concentration of NaOH (in mol/L)) / Volume of HCl solution (in L)

Multiply the volume of NaOH solution used by its concentration to find the amount of NaOH used. Then, divide this amount by the volume of HCl solution used to find the concentration of HCl.

6b. To determine the pH of the water at site B, you need to know the concentration of HCl from the previous calculation. The pH can be calculated using the formula:

pH = -log10[H+]

Since HCl is a strong acid, it dissociates completely into H+ ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl. Take the negative logarithm (base 10) of the H+ concentration to find the pH.

To check if the water is safe, compare the calculated pH value to the range provided (pH 4.5-7.5). If the pH falls within this range, the water is considered safe for plant and animal reproduction in an aquatic environment.

6c. Use a similar calculation as in 6a to determine the average concentration of HCl in the sample from site C.

6d. Use the concentration of HCl from 6c to calculate the pH using the formula in 6b. Follow the same procedure to check if the water is safe based on the pH range.

7. To find the most current pH value for the Grand River, you can search for the latest data from reliable sources such as environmental agencies, research institutions, or government websites. Compare this pH value to the pH values obtained in the experiment to assess the difference between them.

Remember, without the specific data and observations, the calculations and comparisons provided here are only general guidelines. It's important to use the actual data from your experiment to obtain accurate results and conclusions.

Please mark as Brainliest

The valence shell of carbon contains four electrons. Each of these electrons are shared with a hydrogen atom. Consequently, the carbon and hydrogen atoms in the methane (CH4) molecule share four electron pairs.

The CH4 molecule does not contain an unshared pair of electrons.Due to the fact that carbon has a valence of 4, it can only make a maximum of 4 bonds with other atoms. Since the hydrogen only has one electron, it can only create one bond. Here, one electron from each hydrogen atom and each of the four valence electrons of carbon are shared, generating four sigma covalent connections. As a result, all of the valence electrons on carbon and hydrogen participate in the creation of the bond and no unshared pair of electrons is left.

Learn more about electrons here:

https://brainly.com/question/1255220

#SPJ4

Television technology has evolved from the process of analogue to the process of digital signal transmission.

We know that technology has to do with the correct application of the scientific knowledge so as to solve practical problems. The chemical engineer is ultimately involved in the process of problem solving the society.

The television technology has evolved from the analogue transmission of the signals when I was a child to the digital transmission of signals thus most of the television stations now do digital transmission.

Learn more about television technology:https://brainly.com/question/28099377

#SPJ1

Answer:

They vibrate about a fixed position

Answer:

A group is a vertical row on the periodic table and a period is a horizontal row on the periodic table.

Explanation:

Answer:

A group on the periodic table refers to the vertical arrangement of the elements while a period refers to the horizontal rows of elements

Answer:  50 nm

Explanation:  Two steps:

1.  Divide 3.25/6.5 = 0.5

2.  Divide 10^8/10^6 = 10^2

nm^2/nm = nm

Combine:  0.5x10^2 nm

or 50 nm

When a reaction mixture reaches chemical equilibrium, The forward, as well as reverse reactions, happen at the same rates.

The concentrations of reactants, as well as products, remain unchanged when chemical equilibrium would be reached. It's crucial to keep in mind that both forward but also reverse reactions continue to happen, but at an equal rate.

The system enters a state of dynamic equilibrium when both forward as well as reverse reactions happen at the same rate. Chemical equilibrium happens when all of the reaction's steps reach dynamic equilibrium, or when there gets the balance between the reagents as well as the products is reached.

Therefore, when a reaction mixture reaches chemical equilibrium, The forward, as well as reverse reactions, happen at the same rates.

To know more about chemical equilibrium

https://brainly.com/question/8432443

#SPJ4

Warm ocean water, Wind shear and moisture content are the factors which contributes the formation of a Hurricane.

Hurricane can be defined as a massive heat engine which transferring heat energy from the surface of the ocean and releasing it into the atmosphere. Hurricane can't occur until waters are hot enough to fuel tropical development. Hurricanes form only in the tropical waters where ocean temperatures are above 80 degrees. Wind shear in a storm is the change of wind speed or direction vertically through the storm which leads to the hurricane. If the wind is stronger towards the top of the hurricane  that is high shearing the center column of the storm will become tilted. These are jam packed with moisture. These are like steam engines sucking up heat energy from the water into the belly of the storm.

To learn more about Hurricane

https://brainly.com/question/18221136

#SPJ4

Two different samples of matter are measured in each of these glass containers. Both of the containers show the same measure for both samples of matter. These samples have volume in common.

In chemistry, volume is defined as the three-dimensional space taken up by matter. Volume is measured in cubic meters.

If you were to put two different samples in a graduated glass container and both of them have the particular digit that shows their volume then it means their volume is the same and they take up the same amount of space irrespective of their chemical composition.

For example, if you pour the sample into a glass container and the number you get is 250 m³.

Then this 250 m³ refers to the volume of the sample.

In general, volume is measured as volume =  mass/density and its SI unit is m³.

If you need to learn more about matter click here:

https://brainly.com/question/16982523

#SPJ4

Alkenes are hydrocarbons that contain a double carbon bond, whereas alkanes are hydrocarbons that only have single carbon-carbon bonds.

The reason why alkenes are more reactive than alkanes is that the double bond has a very high electron density in comprarison to the single bond of the alkanes. This double bond is made up of one very strong σ bond and a weak π bond.

So generally alkenes react breaking the π bond.

A sudden increase in end-tidal CO2 (carbon dioxide) levels may be the earliest indicator of respiratory distress or failure.

End-tidal CO2 refers to the partial pressure or concentration of CO2 at the end of an exhaled breath. It is a reflection of the CO2 levels in the bloodstream. In a healthy individual, end-tidal CO2 levels are relatively stable and within a normal range. However, a sudden increase in end-tidal CO2 can indicate a problem with respiratory function. It may suggest that the body is not effectively eliminating CO2, which can occur in conditions such as hypoventilation, airway obstruction, respiratory muscle weakness, or respiratory failure.Monitoring end-tidal CO2 is commonly done in medical settings, especially during anesthesia or critical care, as it provides valuable information about a patient's ventilation and respiratory status. Detecting an abrupt increase in end-tidal CO2 can prompt early intervention and treatment to prevent further respiratory compromise and improve patient outcomes.

To know more about concentration, click here https://brainly.com/question/3045247

#SPJ11

Answer:

Mass and volume are extrinsic properties.

A pail may contain water that is  1 kg  in mass and  1 L  in volume.

A drop of water may be  1 g  in mass and  1 mL  in volume.

Both are water, but they have different mass and volumes. Therefore you can't identify whether a substance is water just by measuring its mass and volume.

However, the ratio of the mass to volume (density) can be used to identify substances.