9. Which of the following shows whose model?a. Bohrb. Daltonc. Rutherfordd. Thomson

In this compound, there would be five proton NMR signals,

We know that the acronym NMR means nuclear magnetic resonance. It has to do with the kind of spectrum in which the kind of chemical environment where the proton is found would impact the spectrum that is observed in the compound.

The first thing that we need to look at and find out in the image is to be able to find out the number of chemical environments that we have in the compound as we can see it in the image.

By studying the compound closely, we can see that there are four different proton chemical environments that we can be able to see and map out from the compound and it is these chemical environments that tell us the number of signals to expect.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer: Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field, and a changing magnetic field creates an electric field.

Answer:How are electricity and magnetism related?

Moving magnets can make electrical currents.

Electricity and magnetism are not related.

Protons and electrons are repelled by magnets.How are electricity and magnetism related?

Moving magnets can make electrical currents.

Electricity and magnetism are not related.

Protons and electrons are repelled by magnets.How are electricity and magnetism related?

Moving magnets can make electrical currents.

Electricity and magnetism are not related.

Protons and electrons are repelled by magnets.

Explanation:

Answer: The molecular formula will be \(C_8N_4H_{10}O_2\)

Explanation:

Mass of C= 49.47 g

Mass of N = 28.85 g

Mass of O = 16.48 g

Mass of H = 5.20 g

Step 1 : convert given masses into moles.

Moles of C =\(\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{49.47g}{12g/mole}=4.12moles\)

Moles of N =\(\frac{\text{ given mass of N}}{\text{ molar mass of N}}= \frac{28.85g}{14g/mole}=2.06moles\)

Moles of O =\(\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{16.48g}{16g/mole}=1.03moles\)

Moles of H =\(\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{5.20g}{1g/mole}=5.20moles\)

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = \(\frac{4.12}{1.03}=4\)

For N = \(\frac{2.06}{1.03}=2\)

For O =\(\frac{1.03}{1.03}=1\)

For H = \(\frac{5.20}{1.03}=5\)

The ratio of C : N: O: H = 4: 2: 1: 5

Hence the empirical formula is \(C_4N_2OH_5\)

The empirical weight of \(C_4N_2OH_5\) = 4(12)+2(14)+1(16)+5(1)= 97 g.

The molecular weight = 194.19 g/mole

Now we have to calculate the molecular formula.

\(n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{194.19}{97}=2\)

The molecular formula will be = \(2\times C_4N_2H_5O=C_8N_4H_{10}O_2\)

All solutions are mixtures of two or more substances, but unless the mixture has a homogeneous distribution of solutes in the solvent, then the mixture is not a solution. Therefore, all mixtures are not solutions.

Answer:

Explanation:k

Answer:

Explanation:

Answer:

42 grams

Explanation:

the conversion between moles and grams is by using the molar mass of the substance.

The molar mass for a nitrogen atom is 14.00 g/mol.

N2 has two nitrogen atoms, so its molar mass is 28.00 g/mol

To find how many grams are in 1.5 moles;

                                           \(28g/mol*1.5mol\)

the units of mols cancels out, leaving one with units of grams of N2

It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.

In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.

During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.

However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.

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Answer:

12,579,000

Explanation:

Kilogram (kg) and centigram (cg) are units of mass. It is important to know the value of each when converting from one to the other and vice-versa.

Take note that: 1 kg is equivalent to 100,000 cg

Conversion may be done through the direct proportion method.

Let x be the number of what we're looking for.

Step 1: \(\frac{1 kg}{10,000 cg}\) multiplied by \(\frac{125.79 kg}{x}\) = ?

Step 2: Then, we may cross multiply

            \(\frac{1 kg (x)}{100,000 cg (125.79 kg)}\) = ?

Step 3: \(\frac{x}{12,579,000 cg}\) = ?

Step 4: Therefore, x is equivalent to 12,579,000 cg

Answer:

Scavengers

Explanation:

Answer:

A scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. Where possible, theories are tested under controlled conditions in an experiment.

Explanation:

Answer:

SI has seven basic units, from which others are derived: the second, ... of the metric system had grown out of the problems scientists encountered.

Explanation:

I learned this in school

The incorrect part of the chemical equation is the coefficient for the oxygen gas reactant.

        2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

        2 C2H10 (should be C2H6) + 10 O2 → 8 CO2 + 10 H2O

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Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the  pH of a 0.01 M acetic acid.

Any hydrogen that comprises a material capable of giving a proton (a hydrogen ion) to another chemical is defined as acid. A base is indeed a molecule or ion that can receive a hydronium ion from just an acid.

1)Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. The pH value of stronger acid is lower.

2)CH\(_3\)COOH + H\(_2\)O  ⇄ CH\(_3\)COO⁻+  H\(_3\)O⁺

 0.01             0               0

 -x              +x                +x

 0.01-x           +x        +x

Ka=[ CH\(_3\)COO⁻][H\(_3\)O⁺]/[CH\(_3\)COOH]

1.8×10⁻⁵ = [x][x ]/[  0.01-x ]

x=1.34×10⁻³

pH = -log[H⁺]

     =  -log[1.34×10⁻³]

     =2.88

Therefore, because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the   pH of a 0.01 M acetic acid.

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Answer:

Product: propan-1-ol

Explanation:

IIn this case, we have to remember that \(LiAlH_4\)  is a reduction agent.  So, this is a reduction reaction. The \(LiAlH_4\) has the ability to produce hydride ions \(H^-\). This ion can attack the carbonyl group generating a negative charge in the oxygen. In the next step, the negative charge in the oxygen can attack a water molecule to protonate the molecule and produce propan-1-ol.

See figure 1

I hope it helps!

Explanation:

1.The gas law that we will use to solve this problem is the combined gas law.

2.We will choose the combined gas law because there are three variables that are changing in this problem: volume, pressure, and temperature.

3The volume is decreasing in this problem, from 1.74 L to 1.56 L.

The unknown that we are solving for is T2, the temperature at which the balloon will have a volume of 1.56 L.

4We will use the temperature in Kelvin for our calculations. To convert from Celsius to Kelvin, we add 273.15 to the Celsius temperature. Therefore, the temperature we will use in our calculations is 293.35 K (20.2°C + 273.15).

5To find the final temperature, we can use the combined gas law equation:

(P1 x V1)/T1 = (P2 x V2)/T2

where P1 = 1.02 atm, V1 = 1.74 L, T1 = 293.35 K, P2 = 0.980 atm, and V2 = 1.56 L.

Substituting the values into the equation and solving for T2, we get:

T2 = (P2 x V2 x T1)/(P1 x V1)

= (0.980 atm x 1.56 L x 293.35 K)/(1.02 atm x 1.74 L)

= 268.06 K

Therefore, the final temperature after the volume and pressure decrease is 268.06 K, which is approximately 253 K (option A).

From the information given:

∴

The volume of the sterling silver pendant is:

= 61.3 mL - 50.0 mL

= 11.3 mL

Since, 1 mL = 1cm³

Then;

11.3 mL = 11.3 cm³

Using the relation for Density; i.e.

\(\mathbf{Density = \dfrac{mass}{volume}}\)

\(\mathbf{10.25 \ g/cm^3= \dfrac{mass}{11.3 \ cm^3}}\)

mass = 10.25 g/cm³× 11.3 cm³

mass of the sterling silver = 115.825 grams

Recall that sterling silver has:

∴

The mass of the copper contained in the sterling silver pendant can be calculated as:

\(\mathbf{= \dfrac{115.825 \ g \times 7.5}{100}}\)

= 8.687 grams

Therefore, we can conclude that the mass of the copper contained in the sterling silver pendant is 8.687 grams

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Answer:

yah it was one of my best I've ever had

The diagram representing the ionized state of matter is the plasma state.

2Diagrams of four states of matter

Solid: A solid is a state of matter in which the constituent particles, such as atoms, molecules, or ions, are packed together tightly and firmly held by strong intermolecular forces.

Liquid: A liquid is a state of matter in which the constituent particles, such as atoms, molecules, or ions, are closely packed together but are not held together as strongly as in solids.

Gas: A gas is a state of matter in which the constituent particles, such as atoms, molecules, or ions, are widely separated and are not held together as strongly as in liquids and solids.

Plasma: Plasma is a state of matter in which a gas has been ionized, and it becomes a collection of charged particles such as positive ions and free electrons.

Plasma is a type of ionized gas in which the gas is composed of ions, electrons, and neutral atoms.

Plasma is a state of matter that is similar to a gas in that it has no fixed shape or volume, but unlike gas, it is made up of electrically charged particles.

The electrical charges in plasma are due to the presence of both positive and negative ions.

The most common example of plasma is lightning, and it is also present in fluorescent lights, neon signs, and plasma TVs.

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Hypothesis is a proposed explanation for an observable phenomenon. The term comes from the Greek word for "to suppose." Variables, on the other hand, are anything that can be changed or measured. Variables can be independent, dependent, or control variables. Learning activities titled “Hypothesis”, “Variables and Hypothesis” and “Constructing a Hypothesis” share similarities and differences with a question that comes in response to an observation and a scientific research question.

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Answer:

2160 days divided by 365 days which is a year is equal to about 5.9 years in school * sighhh*

5.91780821918

Answer:

2

Explanation:

.

Answer :

The substance is in the gas phase only in region  → 5

The substance is in both the liquid and the solid  phase in region  → 2

The substance is in only the liquid phase in region  → 3

The melting point is the temperature at region  → 2

The boiling point is the temperature at region → 4

Explanation :

Six phases of substance:

Answer:

5, 2, 3, 2, 4.

Explanation:

got it correct on edge 2021

Answer:

1 is the correct answer of the question

The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

When a hot metal plate is placed in air at room temperature, heat transfer occurs between the metal and the surrounding air. The metal plate, being at a higher temperature, transfers heat to the surrounding air through conduction and convection. As a result, the air molecules that are in direct contact with the hot metal will gain energy and start moving at higher speeds.

On the other hand, the molecules in the metal plate will lose energy to the cooler air and, consequently, slow down. This is due to the transfer of thermal energy from the metal to the air.

Therefore, the most likely event over the next few minutes is that the air molecules surrounding the metal will speed up, and the molecules in the metal will slow down.

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When a hot metal plate at 150°C is placed in the air at room temperature, the heat transfers from the hot object to the cooler one - the warmer metal plate's molecules will slow down as they lose heat and the cooler air molecules surrounding it will speed up as they gain heat.

If a hot metal plate at 150°C is placed in the air at room temperature, the event that would most likely happen over the next few minutes is that the air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Explanation: Heat typically transfers from hotter objects to cooler objects according to the laws of thermodynamics. So, when a heated metal plate is placed in a cooler environment, the heat energy from the metal plate will transfer to the cooler air molecules. As a result, the air molecules will begin to move faster and the metal molecules will begin to slow down as the metal plate cools. This process continues until the metal plate and the air have reached a state of thermal equilibrium, which is when they have the same temperature.

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Answer:

212° F

Explanation:

To ensure insurance coverage for Percocet, it is essential to verify the patient's insurance coverage and check if prior authorization is required. If prior authorization is necessary, gather the required information, complete the authorization form, and submit it to the insurance company.

When a patient presents a prescription for a medication like Percocet, which requires prior authorization from the insurance company, several steps should be taken:

Verify Insurance Coverage: Check the patient's insurance coverage and confirm if prior authorization is required for Percocet. This can be done by contacting the insurance company or using an online portal provided by the insurer.

Review Prior Authorization Criteria: Understand the specific requirements set by the insurance company for obtaining prior authorization for Percocet. This may include documentation, medical history, and supporting evidence to justify the need for the medication.

Gather Patient Information: Collect relevant patient information, including medical records, diagnosis, and any previous treatments. This information will be used to support the prior authorization request.

Complete Prior Authorization Form: Fill out the necessary prior authorization form provided by the insurance company. Ensure that all required information is accurately entered, including the patient's details, prescriber information, and supporting documentation.

Submit the Request: Send the completed prior authorization form along with any supporting documents to the insurance company. This can be done electronically through their designated channels or by fax/mail, following their specified process.

Follow Up: Monitor the progress of the prior authorization request. Follow up with the insurance company to confirm receipt, inquire about any additional information needed, and track the status of the request.

Inform the Patient: Keep the patient informed about the prior authorization process, estimated timelines, and any potential out-of-pocket costs they may incur.

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Maddy made the error of multiplying by 10 rather than 100, which produced an answer that was 10 times off in the conversion of units.

The work of Maddy is flawed. We must multiply the value in grammes by 100 to convert it to centigrammes. Maddy gave the wrong answer of 7.5 cg by multiplying the weight in grammes by 10 rather than 100.

In order to convert 0.75 grammes to centigrammes, use the following formula:

100 cg/g x 0.75 g equals 75 cg

Consequently, 0.75 grammes is 75 centigrammes. Maddy made the error of multiplying by 10 rather than 100, which produced an answer that was 10 times off.

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4.41 × 10⁻⁴⁵m is the wavelength of the photon and the energy correspond to red color.

The term wavelength is defined as the distance between two identical points that are adjacent crests and troughs.

The SI unit of wavelength is metre mostly represented as m.

The wavelength is mostly represented by λ is the Greek letter lambda.

Given:

E =  4.50x10⁻¹⁹ J/photon

h = Planck constant = 6.626 × 10⁻³⁴

ν = ?

E = hν

ν = E/h

By substituting the values in above question and we get,

= 4.50x10^-19 /  6.626 × 10⁻³⁴

=  0.679 × 10⁻¹⁵

c = 3 × 10⁸

E = hc/λ

λ = hc/E

By substituting the values in above question and we get,

λ = 6.626 × 10⁻³⁴ ×  3 × 10⁸ / 4.50x10⁻¹⁹

λ = 4.41 × 10⁻⁴⁵m

Thus, the wavelength of the photon is 4.41 × 10⁻⁴⁵m and color does this energy correspond to red.

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