based on your experimental results what is the ranking of the halides from most to least reactive (meaning the halide (cl-, br-, i-) that underwent the most reactions)?

Answer:

B) Covalent, because electrons are shared.

Two atoms with an electronegativity difference of 0.4 form a bond that is covalent bond because electrons are shared.

Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.

Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.

Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.

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Answer:

Insulator

Explanation:

An eraser can't conduct electricity, which makes it an insulator.

Answer:

equal

Explanation:

According to the law of conservation of matter, the number of atoms before and after a chemical reaction should be equal, such that no atoms are, under normal circumstances, created or destroyed.

Answer:

temperature

Explanation:

When conduct electricity an ion from this excited state, 54.4 eV of energy must be provided.

What is an definition of energy?

Energy is referred to and by scientists as the capacity for work. People have figured out how to transform energy from one type to another and then use it to accomplish tasks, making modern civilization possible. Chemical, electrical, radiant, mechanical, thermal, and nuclear energy are the six main types of energy. Additional forms including electrochemical, acoustic, electromagnetic, and others might be addressed in other studies.

Briefing:

Since this electron has an energy of,

E₂=-Z²*13.6/n² eV

=-4²*13.6/2² eV

=-54.4eV

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In my opinion most of the relationships are a lie,cheat,painful.

An electromagnet is a device in which, by electric current, the magnetic field is produced. Increase the number of coils and increase the strength of the current, thus, increasing the strength of an electromagnet.

The correct option is B.

An electromagnet is a device that consists of a magnetic core encircled by a coil, through which an electric current is carried to magnetize the core.

Wherever controllable magnets are required, such as in devices where the magnetic flux must be adjusted, reversed, or switched on and off, an electromagnet is utilized.

Thus, the correct option is B, increasing the number of coils and increasing the strength of the current.

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When a sample of oxygen gas in a closed container of constant volume is heated until its absolute temperature is doubled, the average kinetic energy of the gas molecules is also doubled.

The average kinetic energy of gas molecules is directly proportional to the absolute temperature according to the kinetic theory of gases. By doubling the absolute temperature, the average kinetic energy of the oxygen molecules increases by a factor of two.

This increase in kinetic energy leads to an increase in the speed and energy of individual gas molecules, resulting in a higher temperature of the gas sample. Therefore, the doubling of the absolute temperature corresponds to a doubling of the average kinetic energy of the oxygen gas molecules.


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In the same way, as the U.S. customary system employs feet, quarts, and ounces to measure these things, the metric system measures length, liquid volume, and mass in units like meter, liter, and gram.

The metric system uses kilograms or grams to measure mass, meters or kilometers to measure distance, and liters to measure volume. Time doesn't have any quantifiable physical qualities. The length of time between two events is what we are actually counting. People have used a variety of methods throughout history to keep track of the passage of time, including sunrise and sunset times and moon phases. Volume, which is measured in cubic units, is the area in three dimensions that matter occupies or that is encircled by a surface. The cubic meter (m3), a derivation of the SI unit of volume.

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The answer is: The overall charge of the electron cloud is negative,

Electron: Electron is a sub-atomic particle which is found outside the nucleus of an atom. The charge carried by an electron is negative.

What is the electron cloud and who suggest this idea?

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The latent heat of vaporization of boiling water is 540 cal/gm. Option b is the correct answer.

It is the amount of heat needed to convert 1 gram of water from liquid to vapor state at atmospheric pressure at a constant temperature. The latent heat of vaporization for water is relatively high compared to other liquids because of the strong hydrogen bonding between water molecules. This means that water requires a lot of energy to break these bonds and change from a liquid to a gaseous state. The latent heat of vaporization is also responsible for the cooling effect of evaporation. When sweat evaporates from our skin, it absorbs heat from our body, which helps to cool us down. In conclusion, the latent heat of vaporization of boiling water is 540 cal/gm, which represents the amount of heat required to convert 1 gram of water from liquid to vapor state at atmospheric pressure at a constant temperature.

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Answer: The answer is B. The pressure inside the tires increased.

Explanation:

The relationship between the pressure, volume, and temperature of a gas is described by the ideal gas law, which is usually written as:

\($$PV = nRT$$\)

where:

- \(\(P\)\) is the pressure,

- \(\(V\)\) is the volume,

- \(\(n\)\) is the number of moles of gas,

- \(\(R\)\) is the ideal gas constant, and

- \(\(T\)\) is the temperature (in Kelvin).

In this case, the volume \(\(V\)\) and the number of moles \(\(n\)\) of air in the tires stay the same. The temperature \(\(T\)\) is increasing. Therefore, for the equation to remain balanced, the pressure \(\(P\)\) must also increase.

So, the answer is B. The pressure inside the tires increased.

a. The balanced chemical equation for the reaction between Mg and N2 is:

3Mg(s) + N2(g) → Mg3N2(s)

From the equation, we can see that 3 moles of Mg reacts with 1 mole of N2 to produce 1 mole of Mg3N2. The molar mass of Mg is 24.31 g/mol, while the molar mass of N2 is 28.02 g/mol. To determine the mass of N2 required to react with 20 g of Mg, we can use the following calculation:

20 g Mg × (1 mol Mg/24.31 g) × (1 mol N2/3 mol Mg) × (28.02 g N2/1 mol N2) = 30.4 g N2

Therefore, 30.4 g of N2 is needed to completely react with 20 g of Mg.

b. Using the same balanced chemical equation as in part (a), we can see that 3 moles of Mg react to form 1 mole of Mg3N2. The molar mass of Mg3N2 is 100.93 g/mol. To determine the mass of Mg3N2 produced, we can use the following calculation:

20 g Mg × (1 mol Mg/24.31 g) × (1 mol Mg3N2/3 mol Mg) × (100.93 g Mg3N2/1 mol Mg3N2) = 83.4 g Mg3N2

Therefore, 83.4 g of Mg3N2 is produced from 20 g of Mg.

The claim that the atomic model should not be continually changed is based on the principle of scientific stability and coherence. Continually changing the atomic model can undermine the stability of scientific understanding and impede the development of robust theories.

The claim that the atomic model should not be continually changed is based on the principle of scientific stability and coherence. Continually changing the atomic model can undermine the stability of scientific understanding and impede the development of robust theories. The current atomic model, based on quantum mechanics and the understanding of subatomic particles, has provided a consistent framework that has successfully explained and predicted numerous phenomena. This model has undergone rigorous testing, verification, and refinement over the years. While scientific progress and new discoveries are essential, it is important to maintain a balance between incorporating new evidence and maintaining a stable foundation. Frequent changes to the atomic model can lead to confusion and make it difficult to build upon existing knowledge. It is preferable to refine and expand upon the current model as new evidence emerges, rather than discarding it entirely. This approach ensures continuity and progress in scientific understanding while maintaining a coherent framework for further exploration.

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The pressure of A 5.15L balloon has a pressure of 1.35 atm. If compressed to 3.43L is 2.03 atm and volume of 0.785 moles of N₂ fill a balloon at 1.5 atm and 301 K is 19.4 L.

According to the equation of ideal gas

\(P_{1} V_{1} =P_{2} V_{2}\)

Substituting the value in the above equation,

\(1.35*5.15=P_{2} *3.43\)

\(P_{2} =\frac{1.35*5.15}{3.43}\)

\(P_{2}\)= 2.03 atm

According to ideal gas equation

PV=nRT

Substituting value in above equation

\(V= \frac{nRT}{P}\)

\(V= \frac{0.785*0.0821*301}{1.5}\)

V= 19.4 L

The equation of state of an ideal gas, often known as the general gas equation, is the ideal gas law. Even though it has a number of restrictions, it is a good approximation of the behavior of various gases under a variety of situations.

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Answer:

469.9K

Explanation:

Using Charles's law equation:

V1/T1 = V2/T2

Where;

V1 = initial volume (ml)

V2 = final volume (ml)

T1 = initial temperature (K)

T2 = final temperature (K)

Based on the information provided:

V1 = 280.0ml

V2 = 440.0 ml

T1 = 26.0°C = 26 + 273 = 299K

T2 = ?

Using V1/T1 = V2/T2

280/299 = 440/T2

0.936 = 440/T2

T2 = 440 ÷ 0.936

T2 = 469.9K

The aldol reaction often involves a dehydration step to remove an alcohol and form an alkene, the driving force of this step is C. The formation of a conjugated pi system.

The Aldol reaction is a type of organic reaction that involves the formation of a new carbon-carbon bond between an enolizable carbonyl compound (such as an aldehyde or ketone) and a carbonyl compound. The reaction is named after its discoverer, Russian chemist Alexander Borodin, and the German words for "aldehyde" and "alcohol," which are the two types of compounds that participate in the reaction.

The reaction can be catalyzed by either an acid or a base, and can be carried out in both aqueous and organic solvents. In the reaction, the carbonyl compound undergoes a nucleophilic attack by the enolate ion, which is formed by the removal of an α-hydrogen from the carbonyl compound in the presence of a base. This leads to the formation of a β-hydroxy carbonyl compound, which can undergo further reactions such as dehydration or condensation.

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a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Answer:

NH4

Explanation:

The question is mostly solved. The definition of heat is used for this problem which tells us:

Where,

Q is the heat added to the system, 120 J

m is the mass of the metal, 5.0 g

Cp is the specific heat of the metal, 0.385J/g°C

dT is the change of temperature:

T2 is the final temperature, unknown

T1 is the initial temperature, 22°C

We clear the final temperature from the equation:

Now, we replace the known data:

Answer:

The final temperature of the metal will be 84°C

The change in the temperature will be 84°C-22°C=62°C

The mass per cent of barium in the sample is approximately 51.9%. The correct answer is E.

To determine the mass per cent of barium in the sample, we can calculate the mass of barium present in the \(BaSO_4\) precipitate.

Given:

Mass of \(BaSO_4\) precipitate = 0.746 g

\(BaSO_4\) is composed of one barium ion (Ba2+) and one sulfate ion \((SO_{42^-})\). The molar mass of \(BaSO_4\) is 233.39 g/mol.

Using the molar ratio of barium to \(BaSO_4\) (1:1), we can calculate the moles of barium in the precipitate:

Moles of barium = Mass of \(BaSO_4\) / Molar mass of \(BaSO_4\)

               = 0.746 g / 233.39 g/mol

               ≈ 0.003193 mol

To calculate the mass per cent of barium in the sample, we divide the mass of barium by the initial mass of the sample and multiply by 100:

Mass per cent of barium = (Mass of barium / Initial mass of sample) × 100

                     = (0.003193 mol × 137.33 g/mol) / 0.846 g × 100

                     ≈ 51.9%

Therefore, the mass per cent of barium in the sample is approximately 51.9%. The correct answer is E.

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Answer:

Explanation:

C = 41.4/12 = 3.43

H = 3.47/1 = 3.47

O = 55.1/16 =3.44

CHO is the skeletal formula (divide each by the lowest number above). The results are close enough to 1 to be 1.

(CHO)_x = 116

C + H + O = 29

(29) _ x = 116

x = 116/29

x = 4

So there area 4 carbons 4 hydrogens and 4 oxygens.

The correct formula is C4H4O4

Answer:

The hot water was better for removing the oil.

Explanation:

You can see that because the mass went down more with the hot water. So, that means that more oil was taken out of the feather with hot water.

Answer:

The mass changed from 1.1grams to 4.5 grams. The appearance is another thing that changed when it got dipped in oil. The feather look like it lost some feathers or the feathers became transparent. The feather just looks soggy and heavier overall.  I believe that if Natalia dips the feather covered in oil in cold water, the feather will remain the same. If she were to dip it in hot water, the feather will get rid of the oil mostly. Think about it, in the ocean the water is cold right? So when oil spills in the ocean it will stay there. Hot water is the best to remove the oil from the feather.

Explanation:

Hopefully this will help.

Answer:

45 °C.

Explanation:

From the question given above, the following data were obtained:

Heat (Q) = 1125 J

Mass (M) = 250 g

Final temperature (T₂) = 55 °C

Specific heat capacity (C) = 0.45 J/gºC

Initial temperature (T₁) =?

The initial temperature of the iron can be obtained as illustrated below:

Q = MC(T₂ – T₁)

1125 = 250 × 0.45 (55 – T₁)

1125 = 112.5 (55 – T₁)

Divide both side by 112.5

1125/112.5 = 55 – T₁

10 = 55 – T₁

Collect like terms

10 – 55 = –T₁

–45 = –T₁

Multiply through by –1

45 = T₁

T₁ = 45 °C

Therefore, the initial temperature of the iron is 45 °C

Answer:

1 mole of lithium is 7 grams. we know this from it's relative molecular mass.

if 1 mole is 7 grams then x moles is 0.56 grams

we can equate them by saying (1/x)=(7/0.56)

after cross multiplying, we get 7x=0.56, x will be equals to 0.56/7

x=0.08 grams

0.08 mole is your answer

Answer:

we have

1 mole of li =7g

now

5.6×10^-1g of li =1mole/7g×5.6×10^-1 g=0.08mole

Answer:

\(^A_ZX\) is the notion of an atom 'X', if the mass number is A and the atomic number is Z

Explanation:

The symbol of the element is "X"

The notion comprises of symbol of element "X" in the center.

On the upper left side of the symbol mass number "A" is kept and on the lower left side of the symbol, atomic number "Z" is kept.

Thus, notion will be

\(^A_ZX\)

The saturation pressure of every gas in the entire volume, if somehow the gases being allowed to mix, is 2.5 atm.

In comparison to other forms of matter, like solids and liquids, vapors have a lower density. Particles have a great deal of kinetic energy yet aren't very attracted to one another, thus there is a lot of unoccupied space between them. A sampling of matter that assumes the shape of the bottle it is stored in and develops a consistent density on the inside of the container is referred to as a gas.

Pressure = 2.10 atm

Temperature = T K

Volume = 712 mL

= 0.712 L (1 mL = 0.001 L)

PV=nRT,

2.10 atm × 0.712 L = n × 0.0821 L.atm/K.mol × T K

n = 19.2232 / T moles

For Container B :

Pressure = 4.80 atm

Temperature = T

Volume = 134 mL

= 0.134 L (1 mL = 0.001 L)

= 4.80 atm × 0.134 L = n × 0.0821 L.atm/K.mol × 298 K

= n = 6.3435 / T moles

Total moles = 19.2132 / T moles + 6.3435 / T moles

= 25.5567 /T moles

Total Volume = 712 + 134 mL = 846 mL = 0.846 L

P × 0.846 L = 25.5567 /T × 0.0821 L.atm/K.mol × T

Total P = 2.5 atm

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Answer:

Net: 1N

Explanation:

1.) Net:1N, direction: left

2.) Net: 1N, direction: down

3.) Net: 0N, no motion

4.) Net: 1N, direction: up

5.) Net: 1N, direction: up