What new functional group is found in the final product? a. Alkene b. Alkyne c. alpha, beta-unsaturated carbonyl d. Alcohol e. Tert-butyl group f. Carbonyl

Answer:

Mass of oxygen required = 19.5 moles × 16 g/mol = 312 g.

Explanation:

When benzoic acid (C7H6O2) is treated with aqueous sodium hydroxide (NaOH), it undergoes a reaction called a base-catalyzed hydrolysis.

This reaction results in the formation of the sodium salt of benzoic acid, also known as sodium benzoate (C7H5O2Na), and water (H2O). The reaction can be represented by the following equation:

C7H6O2 + NaOH → C7H5O2Na + H2O

The structure of sodium benzoate can be represented as follows:

O=C-C6H5-O-Na+

Here, the acidic proton (H+) from benzoic acid has been replaced by a sodium cation (Na+), creating a salt that is highly soluble in water.

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Answer: The enthalpy of neutralization is the energy change associated with the reaction of an acid and a base to form a neutral solution of a salt and water. This energy change is typically exothermic, meaning it releases heat.

The acid strength can have an effect on the enthalpy of neutralization. Generally, stronger acids have a more negative enthalpy of neutralization because they release more heat when they react with a base. This is because stronger acids donate their protons more readily to the base, resulting in a stronger electrostatic attraction between the resulting ions, and therefore a more exothermic reaction.

However, it is important to note that the effect of acid strength on enthalpy of neutralization is not the only factor affecting this energy change. Other factors that can influence the enthalpy of neutralization include the strength of the base, the concentration of the acid and base, and the specific reaction conditions, such as temperature and pressure.

Explanation: The enthalpy of neutralization is the energy change associated with the reaction of an acid and a base to form a neutral solution of a salt and water. This energy change is typically exothermic, meaning it releases heat.

The acid strength can have an effect on the enthalpy of neutralization. Generally, stronger acids have a more negative enthalpy of neutralization because they release more heat when they react with a base. This is because stronger acids donate their protons more readily to the base, resulting in a stronger electrostatic attraction between the resulting ions, and therefore a more exothermic reaction.

However, it is important to note that the effect of acid strength on enthalpy of neutralization is not the only factor affecting this energy change. Other factors that can influence the enthalpy of neutralization include the strength of the base, the concentration of the acid and base, and the specific reaction conditions, such as temperature and pressure.

The mass number of the daughter nuclide will remain the same as Thorium-234 (mass number 234). The correct answer is D. 234, 91.

When there are too many protons or neutrons in a nucleus, one of the protons or neutrons will turn into the other, which is known as beta decay. During beta minus decay, a neutron transforms into a proton, electron, and antineutrino.

A daughter nuclide is created when a neutron in the nucleus decays into a proton during beta decay. While the mass number stays constant, the atomic number rises by 1.

We know the daughter nuclide will have an atomic number one unit higher than thorium (atomic number 90) because thorium-234 (Th-234) undergoes beta decay. The daughter nuclide will continue to have the same mass number as thorium-234 (mass number 234).

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The cathode is the electrode where reduction (gain of electrons) takes place (metal-B electrode); in a galvanic cell, it is the positive electrode, as ions get reduced by taking up electrons from the electrode and plate out (while in electrolysis, the cathode is the negative terminal and attracts positive ions from the ...

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Answer:

As

Explanation:

because of ionic bond

Answer:

The answer is transition metals

Explanation:

Transition metals include iron,copper ,gold and silver and thus the correct choice is transition metals.

The transition metals are defined as the elements  in which atoms are present whose d-sub-shell is partially filled .Due to which they give rise to cations with an incomplete d-sub-shell.

They are also defined as the elements which are present in the d-block of the periodic table, which includes groups from three to twelve.These elements are called transition elements as they show a transition between highly electro-positive group 1 and highly electro-negative group 17 elements.

Thus, the correct option is transition metals.

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Answer:

Carbon monoxide (CO) is not a greenhouse gas because it does not trap heat in the Earth's atmosphere.

Explanation:

Answer:

Carbon monoxide (CO) is not a greenhouse gas.

Carbon monoxide is a colorless, odorless, poisonous gas, CO, that burns with a pale-blue flame, produced when carbon burns with insufficient air: used chiefly in organic synthesis, metallurgy, and in preparation of metal carbonyls, as nickel carbonyl.

Water vapor is a dispersion, in air, of molecules of water, especially as produced by evaporation at ambient temperatures rather than by boiling.

The chemical compound with the formula CH4 is methane, a hydrocarbon and primary component of natural gas. It is used in the manufacture of plastics and other commercially important organic chemicals. Methane is also a greenhouse gas that affects the earth's temperature and climate system.

Any of the gases whose absorption of solar radiation is responsible for the greenhouse effect, including carbon dioxide, methane, ozone, and the fluorocarbons.

The Greenhouse Effect is an atmospheric heating phenomenon, caused by short-wave solar radiation being readily transmitted inward through the earth's atmosphere but longer-wavelength heat radiation less readily transmitted outward, owing to its absorption by atmospheric carbon dioxide, water vapor, methane, and other gases; thus, the rising level of carbon dioxide is viewed with concern.

The importance of the use of hydrates in fire extinguishers are;

-They keep fire extinguishers dry during shipping and storage.

-They create foams that have high water content to help extinguish fires.

They create high pressure in the cylinder to quickly force out the fire r*tardant.

We know that a fire extinguisher has to do with any device that has been made in such a way that the device can be used to eliminate a flame that is burning. We all know that fore can be very destructive. This implies that it is important to be able to put out the fire so that it does not cause big problems.

The fire extinguisher is composed of certain chemical substances that are able to react together quickly and then be able to quench the flame of the reaction that is going on in the system.

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Answer:

Reasons water is important

Imagine earth without water. The soil, with no water in it and nothing growing on it, would be lifeless, dead, collapsed into dust, sand, clay or rock.

-Water consumption helps lubricate and cushion your joints, spinal cord, and tissues. This will help you enjoy physical activity and lessen discomfort caused by conditions like arthritis.

-Water is a main component of saliva. Saliva also includes small amounts of electrolytes, mucus, and enzymes. It’s essential for breaking down solid food and keeping your mouth healthy.

The boiling point of water is 100°C (212°F) because it is taken as standard atmospheric pressure (1 atm), which is defined as the temperature at which the vapor pressure of water is equal to the atmospheric pressure.

This occurs because at this temperature, the thermal energy supplied to the liquid is sufficient to overcome the attractive forces holding the molecules in the liquid state and they escape into the air as steam or vapor.

The boiling point of a substance depends on the atmospheric pressure, which can be affected by altitude, so water boils at a lower temperature at higher elevations. Additionally, the addition of impurities or dissolved substances can lower the boiling point of water, while increased pressure will raise the boiling point. Understanding the boiling point of water and its related factors is important in many industrial and scientific applications, including cooking, distillation, and heat transfer.

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The volume required is 4.86 ml that would be required to react completely with 11.73 ml of 1.006 m ca(oh)2.

This can be calculated using:

3Ca(OH)2 (aq) + 2H3PO4 (aq) ---> Ca3(PO4)2 (s) + 6H2O (l)

moles of Ca(OH)2 present: 11.00 moles

moles of H3PO4 needed: 7.33 moles

volume (mls) of H3PO4 needed: 7.33/1.508 = 4.86

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PCL3 has four electron domains, three bonding domains, and one nonbonding domains and the molecular geometry is trigonal pyramidal.

Phosphorus trichloride is inorganic compound with the chemical formula of PCl₃. It is a colorless liquid when pure and is an important industrial chemical, used for the manufacture of other organophosphorus compounds. It is toxic and reacts with water to give hydrogen chloride.

In PCl3, there are 3 electron pairs that is 3 bond pairs and one lone pair of electrons. Molecular geometry of PCL3 is trigonal pyramidal, but the presence of a pair of electrons on phosphorus atom has an asymmetric charge distribution and makes its electron pair geometry tetrahedral.

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Answer:

A chemical mixture is defined as the combination of two or more substances and dispersed among each other (mixed together).

The extract meets the definition of the chemical mixture as the extract is the combination of crushed flowers and ethyl alcohol.

The mixture is heterogeneous because crushed flowers and ethyl alcohol vary in proportion and crushed flowers will be visible in the mixture or not uniformly mixed, unlike homogeneous mixtures.

The plant pigments can be separated from one another using a technique called paper chromatography. In this technique, the extract containing the pigments is marked in a paper and is placed in a specified solvent. The solvent starts moving up the paper through capillary action and the pigments start getting visible with different rates because they are  not equally soluble.

By taking these precautions, Kennedy can minimize the risk of being misled or misrepresented regarding the termite problem in Heather's home.

To reduce the risk of misrepresentation in this situation, Kennedy can take the following steps:

1. Request documentation: Kennedy can ask Heather to provide any documentation or proof of the pest control company's involvement. This may include receipts, invoices, or reports from the company.

2. Conduct an independent inspection: Kennedy can hire a professional inspector to assess the property for any signs of termite damage or infestation. This will help verify the accuracy of Heather's claim.

3. Research the pest control company: Kennedy can look up the pest control company that Heather mentioned to check its reputation and credibility. Reading reviews and checking for any licenses or certifications can provide additional assurance.

4. Consider a written agreement: If Kennedy decides to proceed with the purchase, he can include a clause in the agreement stating that Heather guarantees the absence of termites or any other pest-related issues. This way, he has legal protection if any misrepresentation is discovered later on.

By taking these precautions, Kennedy can minimize the risk of being misled or misrepresented regarding the termite problem in Heather's home.

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The strength of their deactivating power can be ranked as follows:
a. I (strongest deactivator)
b. Br
c. Cl
d. F (weakest deactivator)

The halogens can deactivate the aromatic ring towards electrophilic substitution due to their high electronegativity and ability to withdraw electron density from the ring. The strength of their deactivating power can be ranked as follows:

a. I (strongest deactivator)
b. Br
c. Cl
d. F (weakest deactivator)

This is because iodine has the largest atomic size and the lowest electronegativity among the halogens, making it the most effective at withdrawing electron density from the ring.

Fluorine, on the other hand, has the smallest atomic size and the highest electronegativity, making it the weakest deactivator among the halogens.

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There are  Al2(SO4)3 =0.0423789650037307 mol in  14.5 g of aluminum sulfate.

In one mole of aluminum sulfate, Al2(SO4)3, there are two moles of aluminum, three moles of sulfur, and twelve moles of oxygen.

Al2 (SO4)3 is the chemical formula for aluminum sulfate. One mole of a material weighs one molar mass. Aluminum sulfate has a molar mass of 342.14 g/mole. Aluminum hydroxide, sulfuric acid, and water are combined to create aluminum sulfate. An aluminum sulfate hydrate is the result of the process.

Aluminium=26.981538

Oxygen=15.9994

Sulfur=32.065

Now Molecular weight calculation of aluminium sulphate:

26.981538*2 + (32.065 + 15.9994*4)*3=342.150876g)

Molar mass of Al2(SO4)3 = 342.150876 g/mol

‘.’ In 342.150876g =1 mol

.‘. in 1 gram=1/342.150876=0.00292

1 grams Al2(SO4)3 to mol = 0.00292 mol

Hence for 14.5 gram Al2(SO4)3 =0.0423789650037307 mol.

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Answer:

That is true

Explanation:

:D

Answer:

The mass is 20, 89 grams of He.

Explanation:

We calculate the weight of 1 mol of He, from the atomic weight of each element obtained from the periodic table: Weight 1 mol He= 4, 0020602 g. 1 mol He-----4, 0020602 g. 5,22 mol He---x= (5,22 mol He x4, 0020602 g)/ 1 mol He= 20, 89 g

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The mass of 5.22 mol of He will be 20.84 grams.

We have 5.22 mol of He.

We have to calculate its Mass.

Helium is a chemical element with the symbol He and atomic number 2. It is a gas which is colorless, odorless, tasteless, non-toxic, inert and monatomic.

According to the question -

Number of moles of Helium = 5.22 mol

Now, I mole of Helium will have its mass equal to its Atomic weight. Therefore -

Mass of 1 mole of He = 4.002602 g

So, the mass of 5.2 mol of He will be = 5.2 x 4.002602 = 20.84 grams

Hence, the mass of 5.22 mol of He will be 20.84 grams.

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Answer:

66.8

Explanation:

Calculate that is what I did.

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Law of octaves states that when the elements are arranged in ascending order of atomic mass, every eighth element has comparable properties.

Features of law of octaves -:

Some limitations were made into this -:

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The law of octaves state about the elements​ that there must be 8 electrons in the outermost or valance shell of the electron to obtained the stability.

when the elements are arranged in the increasing order of atomic mass, every eighth element has comparable properties and  that  was the first time an atomic number was introduced  to each element of the periodic table.

To become the stable according to rule element must complete it octave otherwise it cannot be considered the stable one.

Therefore, law of octaves state about the elements​ that there must be 8 electrons in the outermost or valance shell of the electron to obtained the stability.

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Answer:

i think her journey was 680 km/h long

Answer:

6.67 hours

Explanation:

(800 km) / (120 km/hr) = 6.67 hours

Answer:

yes

Explanation:

Answer:

See explanation

Explanation:

If I am running my country, I will go for biomass as an energy resource. Biomass is cheap and readily available. The use of biomass in electricity generation is largely safe and reliable; it even ensures a clearer environment!

Biopower plants burn biomass directly to produce high-pressure steam which is now used to drive a turbine generator to generate electricity. Biomass will always be available at almost no cost hence it offers an inexpensive energy resource for electricity generation.

The solution that would be expected to contain the greatest number of solute particles is 1 liter of 1.0 m NaCl. Option C is the correct answer.

Ionic compounds are chemical compounds composed of ions held together by electrostatic forces of attraction between oppositely charged ions.

When an ionic compound such as NaCl is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (\(\rm Na^+\)) and chloride ions (\(\rm Cl^-\)).

To determine which of the solutions would be expected to contain the greatest number of solute particles, we need to consider the number of solute particles produced by each molecule of the solute.

NaCl dissociates in water to produce two solute particles (\(\rm Na^+\)and \(\rm Cl^-\)), while glucose does not dissociate and therefore produces only one solute particle. Therefore, 1 liter of 1.0 m NaCl would contain twice as many solute particles as 1 liter of 1.0 m glucose.

In conclusion, 1 liter of 1.0 m NaCl solution would be expected to contain the greatest number of solute particles. The correct answer is option C.

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The given question is in inappropriate manner. The correct question is:

When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions and chloride ions. In contrast, the atoms of covalently bonded molecules (e.g., glucose, sucrose, glycerol) do not generally dissociate when placed in aqueous solution. which of the following solutions would be expected to contain the greatest number of solute particles (molecules or ions)?

a. 1 liter of 1.0 m glucose  

b. 1 liter of 0.5 m NaCl

c.  1 liter of 1.0 m NaCl

d. 1 liter of 1.0 m NaCl and 1 liter of 1.0 m glucose will contain equal numbers of solute particles.

Answer:

sphygmomanometer

Explanation: