rank the free radicals (i-iii) shown below in order of decreasing stability (i.e., from most stable to least stable).
CH2CH2CH(CH3)2 CH3CH2C(CH3)2 CH3CHCH(CH3)2

The number of unpaired electrons in a complex ion depends on the number of electrons in the d-orbitals of the metal ion. The d-electron configuration of each complex ion is as follows: 1) d5, 2) d3, 3) d8, 4) d5, and 5) d2.

The complex ion with the fewest number of unpaired electrons will be the one with the highest d-electron pairing energy, which is the energy required to pair up electrons in the same orbital. The complex ion with the highest pairing energy is [Ni(NH3)6]2+, with all of its electrons paired up. Therefore, the answer is 3) [Ni(NH3)6]2+.

The octahedral complex ion with the fewest number of unpaired electrons is 3) [Ni(NH_3)_6]^2+. This is because Ni^2+ has an electron configuration of 3d^8, which means all its d-orbitals are either completely filled or contain paired electrons. In contrast, the other complex ions have metal ions with more unpaired electrons in their d-orbitals, such as Fe^3+ (3d^5), Cr^3+ (3d^3), Rh^3+ (4d^6), and V^3+ (3d^2). The ligands in each complex do not significantly affect the number of unpaired electrons. Thus, [Ni(NH_3)_6]^2+ has the lowest number of unpaired electrons among the given options.

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Answer:

octane is the answer have a good day

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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answer

1. Neon

2. Astatine

3. oxygen

4. Arsenic

5. Silicone

6. Aluminium

7. Calcium

8. Sodium

Answer:

The spectra can be divided into two types viz., emission and absorption spectra. The differences between them are given below. 1) The emission spectrum is obtained due to emission of radiation from the substances. The absorption spectrum is obtained when the substance absorbs the radiation.

Explanation:

Answer and Explanation:

The lesson about the uniqueness of the earth allowed me to realize that the earth is the only planet that has drinking water and oxygen, thus allowing the existence of life on the planet and showing that we would not fully survive on another planet.

The lesson also shows that the earth is the only planet where rotation is capable of causing seasonal differences in different parts of the globe. This is important for several things, including food production and plant growth.

Another factor that shows the uniqueness of the land is its favorable temperature for life, allowing us to have water and to be able to live outdoors, for example. This factor is worrying, since the holes in the ozone layer have caused changes in this temperature.

I was also able to learn about the gravity of the earth, which is the only thing that allows us to do all the activities we do and allows us not to be launched into space. In addition, gravity has a strong influence on seas and agriculture.

Finally, I was able to learn about the tectonic plates, which provide the movement of our crust and influence in several geological processes.

The second method is recommended due to high efficiency.

If the average percent yield of this process is higher than that, this could save the company money so my recommendation to the company is to adopt the other method for production because it is less costly and providing similar result.

In conclusion, the second method is recommended due to high efficiency.

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To determine the number of grams of sulfur dioxide formed when 10.0 mol of copper(I) sulfide reacts during the process of roasting, we need to use the balanced chemical equation and the molar masses of the compounds involved.

The balanced chemical equation for the reaction of copper(I) sulfide (Cu2S) with oxygen (O2) to form copper(I) oxide (Cu2O) and sulfur dioxide (SO2) is:

2 Cu2S + 3 O2 → 2 Cu2O + 2 SO2

From the balanced equation, we can see that for every 2 moles of Cu2S, 2 moles of SO2 are formed.

Therefore, using the stoichiometry of the reaction:

10.0 mol Cu2S * (2 mol SO2 / 2 mol Cu2S) = 10.0 mol SO2

Next, we can calculate the mass of sulfur dioxide using the molar mass of SO2, which is approximately 64.06 g/mol:

Mass of SO2 = 10.0 mol SO2 * 64.06 g/mol

= 640.6 g

Therefore, when 10.0 mol of copper(I) sulfide reacts during roasting, approximately 640.6 grams of sulfur dioxide are formed.

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Acids and bases are chemical substances with contrasting properties. Acids taste sour, turn litmus paper red, and have a low pH. Bases taste bitter, turn litmus paper blue, and have a high pH. When an acid and a base react, they form a salt and water, resulting in a neutral solution.

Acids and bases are fundamental concepts in chemistry. Acids have a sour taste, such as vinegar or lemon juice, and turn litmus paper red. They also have a low pH value, indicating a high concentration of hydrogen ions (H+). On the other hand, bases have a bitter taste, like soap or baking soda, and turn litmus paper blue.

Bases have a high pH value, indicating a low concentration of hydrogen ions and a higher concentration of hydroxide ions (OH-). When an acid and a base react, they undergo a neutralization reaction, resulting in the formation of a salt and water. The salt is composed of a cation from the base and an anion from the acid. The resulting solution is neutral, with a pH of 7. Examples of salts include sodium chloride (table salt) and calcium carbonate (chalk). Alkalis are a type of base that can dissolve in water, forming hydroxide ions.

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The neutralization reaction between hydrobromic acid (HBr) and potassium hydroxide (KOH) can be completed and balanced as follows:

HBr(aq) + KOH(aq) → KBr(aq) + H2O(l)

The products of this reaction are potassium bromide (KBr) and water (H2O).

To write the net ionic equation, we exclude the spectator ions, which are the ions that appear on both sides of the equation unchanged. In this case, the potassium ion (K+) is a spectator ion because it appears on both sides. Therefore, the net ionic equation is:

H+(aq) + OH-(aq) → H2O(l)

In the net ionic equation, the hydrogen ion (H+) from the acid and the hydroxide ion (OH-) from the base combine to form water (H2O).

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Answer:

d. 12.3 grams of Al2O3

Explanation:

The balanced equation in this question is as follows:

4Al + 3O2 → 2Al2O3

In this equation above, 4 moles of Al produces 2 moles of Al2O3

However, the moles of Al2O3 must first be found using;

mole = mass/molar mass

Molar mass of Al = 27g/mol

mole = 6.50/27

= 0.241mol of Al.

Hence, if 4 moles of aluminum (limiting reagent) reacts to form 2 moles of aluminum oxide (Al2O3).

Then, 0.241mol of Al will produce (0.241 × 2/4) = 0.241/2 = 0.121mol of Al2O3.

Convert this mole value to molar mass using mole = mass/molar mass

Molar mass of Al2O3 = 27(2) + 16(3)

= 54 + 48

= 102g/mol

mass = molar mass × mole

mass = 102 × 0.121

mass of Al2O3 = 12.34grams.

Answer:

D

Explanation:

Changing the graph's overall width is the simplest way to alter any object's width or the distance between items. The width and spacing of the bars will alter proportionally as the graph axis is stretched or released to create broader bars.

Scales should be used such that data are simple to plot and understand. Every fifth and/or tenth line on coordinate paper is significantly thicker than the other lines; a major division-line of this nature should always represent a decimal multiple of 1, 2, or 5. (e.g., 0, 1, 2, 0.05, 20, 500, etc.). Other options (like 0.3) make it exceedingly challenging to plot and comprehend the data. Scales shouldn't be set any finer than the measurement device's lowest increment for obtaining data. For instance, it is recommended to plot data from meter sticks, which have graduations of 1 mm, on a scale no finer than 1 division = 1 mm. The data would not allow for any additional plotting precision at scales smaller than 1 div/mm.

So 0.3 spaced graphs can be obtained by proportionally spacing the overall width by narrowing the 0.5 spaced graph.

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Answer:

About 0.054 moles.

Explanation:

Apply the ideal gas law. Recall that:

\(\displaystyle PV = n RT\)

Solve for n, the number of moles:

\(\displaystyle n = \frac{PV}{RT}\)

Determine the pressure of the hydrogen gas. Recall that by Dalton's Law of Partial Pressures, the total pressure is equal to the sum of the partial pressures of each individual gas:

\(\displaystyle P_T = P_\ell + P_\text{H$_2$}\)

Convert the vapor pressure of the liquid to atm (1.00 atm = 760. torr):

\(\displaystyle 18\text{ torr} \cdot \frac{1.00\text{ atm}}{760.\text{ torr}} = 0.024\text{ atm}\)

Therefore, the partial pressure of the hydrogen gas is:

\(\displaystyle \begin{aligned} P_T & = P_\ell + P_\text{H$_2$} \\ \\ (0.788\text{ atm}) & = (0.024\text{ atm}) + P_\text{H$_2$} \\ \\ P_\text{H$_2$} & = 0.764\text{ atm}\end{aligned}\)

Therefore, the number of moles of hydrogen gas present is (the temperature in kelvins is 273.15 + 20.0 = 293.2 K):

\(\displaystyle \begin{aligned} n & = \frac{PV}{RT} \\ \\ & = \frac{(0.764\text{ atm})(1.7\text{ L})}{\left(0.08206 \text{ }\dfrac{\text{L-atm}}{\text{mol-K}}\right)(293.2\text{ K})}\\ \\ & = 0.054\text{ mol H$_2$} \end{aligned}\)

Answer: i think its (b) be abundant in the crust

Explanation:

The piece of information that is NOT required to determine the amount of heat that must be added is the: B) Specific heat of H⁰ and C) ΔH(fusion).

To determine the amount of heat added when liquid water is heated from 50 °C to steam at 150 °C, we need to consider several factors. The specific heat of H₂O(l) is necessary to calculate the heat required to raise the temperature of the liquid water to its boiling point.

The specific heat of H₂O(g) is not required, as we are not calculating the heat needed to raise the temperature of the steam. The ΔH(fusion) is also not needed since we are not dealing with a solid-to-liquid phase change.

However, ΔH(vaporization) is crucial, as it helps determine the heat needed for the liquid-to-gas phase change. Therefore, the information NOT required is B) Specific heat of H₂O(g) and C) ΔH(fusion).

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According to the question Fail to reject H0 in favor of H1. The 95% confidence interval (10, 15) does not contain the value of 16, so we cannot reject H0 at the 0.05 level of significance.

A confidence interval is a range of values that is used to estimate a population parameter with a certain degree of confidence. It is calculated by taking a sample from a population and using the sample statistics to estimate the population parameter. The confidence interval is a measure of the reliability of the estimate. It is calculated by taking into account the sample size, the variability of the sample, and the level of confidence desired. By increasing the sample size and decreasing the variability, the confidence interval can be made more reliable. The confidence interval provides a range of values within which the population parameter is likely to be found.

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Based on the 95% confidence interval for μ with the result (10, 15), the decision that should be made if we test H0 : μ = 16 versus H1 : μ ≠ 16 at α = 0.05 is;

A. Reject H0 in favor of H1.

The 95% confidence interval for the population mean μ is (10, 15).

This means that one can be 95% confident that the true population mean falls between 10 and 15.

The null hypothesis H0: μ = 16 is to be tested against the alternative hypothesis H1: μ ≠ 16 at α = 0.05 level of significance.

The confidence interval (10, 15) does not contain the hypothesized value of μ = 16, it suggests that the population mean is significantly different from 16 at the 0.05 level of significance.

Therefore, reject the null hypothesis H0 in favor of the alternative hypothesis H1.

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Hey!!!

The answer of your question is Gas.

Explanations:

Solid have a fixed shape and volume.

Liquid have a definite volume but no definite shape

Gas neither have fixed shape nor a fixed volume.

Hope it helps...

Good luck on your assignment

Answer:

Explanation:

Cl2 would be 0 and in 2HCl it would be -1 so it is reduced

In br First it would be -1 then 0 so it oxidized

Answer:

Cl2 (0)+ 2H(1+)Br(1-) --> 2H(1+)Cl(1-) +Br(0)

Oxidized= HCl, Cl is oxidized

Reduced=Br, 2HBr is reduced

Oxidized Half-Reaction= Cl + 1e--> Cl

Reduced Half Reaction= Br --> Br+ 1e

Explanation:

Chlorine loses its electron when it bonds with hydrogen= oxidation

Bromine gains electrons when it breaks its bond with hydrogen= reduction

Answer: H2O

Explanation: The alcohol family has properties similar to H2O.

Answer:

H2O

Explanation:

Answer:

D) The electrons move around the nucleus in an electron cloud

Explanation:

i just did it on usa test prep !

Answer:

I dont understand what is the question you need help on-

Explanation:

The percent yield shows the extent to which the reactants are converetd into products . The limiting reactant is used up in the reaction.

A limiting reactant is the reactant that is in the least amount in the system.  Now;

Number of moles of Fe =  12.21 g/56 g/mol = 0.22 moles

Number of moles of O2 = 13.54 g/32 g/mol = 0.42 moles

Balanced reaction equation;

3Fe(s) + 2 O2(g) = Fe3O4(s)

If 3 moles of Fe reacts with 2 mole of O2

0.22 moles of Fe reacts with  0.22 moles * 2 mole/3 moles = 0.15 moles

Hence, Fe is the limiting reactant

If 3 mole of Fe produces 1 mole of  Fe3O4(s)

 0.22 moles  of O2   produces   0.22 moles * 1 mole/3 moles of  Fe3O4(s) = 0.1073 moles

Mass of  Fe3O4(s) =0.1073 moles  * 232 g/mol =16.9 g

Number of moles of excess reactant = 0.42 moles - 0.15 moles = 0.27 moles

Mass of excess reactant = 0.27 moles * 32 g/mol = 8.64 g

percent yield = 15.88 g/16.9 g * 100/1

= 93.4%

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A total of three ions(particles) would be liberated when one formula unit of magnesium bromide is dissolved in water.

Magnesium bromide is an ionic compound, which when dissolved in water would completely ionize to give the magnesium and bromide ions as per the reaction,

MgBr2(aq) ----------> Mg2+(aq) + 2Br- (aq)

Each unit of magnesium bromide gives one magnesium ion and two bromide ions, So a total of three ions(particles) would be liberated when one formula unit of magnesium bromide is dissolved in water.

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Answer:

1

Explanation:

if 33 the answer would be 92 but u think then 92 32 1

Option c) NH4Cl will hydrolyze when dissolved in water.

Hydrolysis is a chemical reaction that occurs when a salt reacts with water, resulting in the formation of an acidic or basic solution. In this case, when NH4Cl (ammonium chloride) is dissolved in water, it undergoes hydrolysis.

The ammonium ion (NH4+) is the conjugate acid of ammonia (NH3), which is a weak base. When NH4Cl dissociates in water, the ammonium ion reacts with water to form NH3 and H3O+ (hydronium ion). This process is called hydrolysis.

NH4+ (aq) + H2O (l) ↔ NH3 (aq) + H3O+ (aq)

The formation of NH3 leads to an increase in the concentration of hydroxide ions (OH-) in the solution, making it slightly basic. At the same time, the presence of H3O+ ions makes the solution slightly acidic. Therefore, the hydrolysis of NH4Cl results in a slightly acidic and slightly basic solution.

In contrast, salts like NaCl and KCl do not undergo hydrolysis when dissolved in water because they consist of cations (Na+ and K+) and anions (Cl-) that do not react with water to form acidic or basic species.

Na2SO4 (sodium sulfate) is also an example of a salt that does not undergo hydrolysis. The sulfate ion (SO42-) does not react with water to form acidic or basic species, so the solution remains neutral.

Therefore, among the given options, only NH4Cl undergoes hydrolysis when dissolved in water.

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The question is incomplete. Find the full content below:

Which one of the following salts when dissolved in water will hydrolyse?

a) NaCl

b) KCl

c) NH4Cl

d)Na2SO4

This is the reaction that's why I have added an image kindly check the attachments.

What is an aromatic compound?

Organic compounds with one or more aromatic rings are referred to as "mono- as well as polycyclic aromatic hydrocarbons". Benzene is the parent compound of aromatic compounds. Before their basic chemical properties were understood, molecules were once grouped together based on smell, giving rise to the term "aromatic." The way that aromatic compounds are currently defined has nothing to do with how they smell. Since one of the heteroatoms—oxygen, nitrogen, or sulfur—replaces at least one carbon atom in the CH group, heteroarenes are chemical compounds that share many similarities. Furan, a heterocyclic compound with such a five-membered ring containing a single oxygen atom, as well as pyridine, a heteroatoms compound with a 6 ring containing only one nitrogen atom, are examples of non-benzene compounds to aromatic properties.

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Answer:

a 1) XZ2

2) YZ

3) X2

b 1) Ionic bond

2) Ionic bond

3) covalent bond

c) ionic compounds has high melting and boiling point

ionic compounds can conduct electicity in aqueous form

covalent compounds have electrons shared between the atoms

covalent compounds have lower melting point compared to ionic compound

Answer:

(i) XZ = Potassium Sulfide [K2SO4]

(ii) YZ = Potassium Chloride [KCI]

(iii) X = Sulfur [S]

b) (i) Ionic Bond. (ii) Ionic Bond. (iii) Covalent Bond.

c) (i) Ionic compounds have high melting and boiling points.

(ii) Ionic compounds can conduct electricity in a molten state or a solution as they have ions that can move and carry charge.

(iii) Covalent compounds have low melting and boiling points.

(iv) Covalent compounds can not conduct electricity as all electrons are involved in bonding so there are no free electrons or ions to carry the charge.

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