all of the following compounds are soluble in water except CaCL2 NH4Cl FeCl3 NaCl PbCl2.

Answer: im not fully sure but from what i rememeber Allergies develop when your immune system mistakenly identifies a thing such as pollen, mold or food as harmful then your body reacts to it

Explanation:

Answer:pluto

Explanation:

Since 2006, per the International Astronomical Union's planetary criteria, Pluto isn't considered a planet because it hasn't cleared the neighborhood around its orbit of other objects.

Answer:

Pluto

Explanation:

Saturn is huge, second biggest plant in our solar system

mercury is big same with Uranus

and Pluto is closer to a moon than a planet

From the problem, we know that:

The half-life of the nuclide is 30 years.

The time that we're going to study are 120 years.

The first thing we need to do is to find the number of half-lives that has elapsed (n). To do this, we divide the time studied by the half life:

How to determine the original mass?

We know that the amount remaining (N) is = 4.1g and the number of half-lives (n) = 4. To find the original amount (No), what we do is to use the following equation:

The original mass of Cs-131 sample was 65.6 grams.

To determine the closest value for the ΔG° of a nickel-cadmium voltaic cell, we need to understand the relationship between ΔG° and the cell potential (E°). The formula to calculate ΔG° is:

ΔG° = -nFE°

where n is the number of moles of electrons transferred, F is the Faraday constant (approximately 96,485 C/mol), and E° is the cell potential.

For a nickel-cadmium voltaic cell, the cell potential E° is approximately 1.50 V. The number of moles of electrons transferred (n) is 2. Plugging these values into the formula:

ΔG° = -(2)(96485 C/mol)(1.50 V)

ΔG° ≈ -289,455 J

Since 1 kJ = 1000 J, we can convert the result to kJ:

ΔG° ≈ -289.5 kJ

Among the given options, the closest value to the ΔG° for a nickel-cadmium voltaic cell is -125 kJ.

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Explanation:

The name for the compound PbO₂ is lead (IV) oxide. The oxidation state of lead is +4 and the oxidation state of oxygen is -2. Actualy the oxidation state of oxygen in oxides is always -2.

Answer: the oxidation state of O in PbO₂ is -2.

The oxidation number of oxygen in the compound PbO₂ is -2. The oxidation number of an atom can be positive, negative, or zero.

Let's assume that the oxidation number of lead (Pb) is x and the oxidation number of oxygen (O) is y. The compound PbO₂ is neutral, which means the sum of the oxidation numbers must be zero.

The oxidation number of Pb is known to be +4 because PbO₂ is lead dioxide, whereas oxygen is typically assigned an oxidation number of -2.

Thus,

(+4) + 2(y) = 0

4 + 2y = 0

2y = -4

y = -2

Therefore, the oxidation number of oxygen (O) in PbO₂ is -2.

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The defining feature of the Bohr model of the atom is the concept of quantized energy levels in which electrons can orbit the nucleus.

Bohr proposed that electrons orbit the nucleus in discrete, rather than continuous, energy levels. These levels of energy are quantized, which means they have a fixed value and do not vary continuously.

Bohr also proposed that electrons can move between these energy levels by absorbing or emitting energy, giving rise to the emission and absorption spectra seen in atomic spectra.

The Bohr model was the first successful attempt to describe the structure of an atom, and it helped to lay the groundwork for modern quantum mechanics.

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Answer:

keep the soil wet

Explanation: if the song wet it will not cause as much dust storms

Answer:

Explanation:

35.453 u

The balanced neutralization equation is HClO(aq) + CsOH(aq) → CsClO(aq) + H2O(l)

A neutralization reaction is a type of chemical reaction in which an acid and a base react to form a salt and water. The reaction is also known as an acid-base reaction.

Here is the balanced neutralization equation for the reaction of hydrogen chloride (HClO) and cesium hydroxide (CsOH) :

HClO(aq) + CsOH(aq) → CsClO(aq) + H2O(l)

In this reaction, the hydrogen ion from HClO is donated to the hydroxide ion from CsOH, forming water and cesium hypochlorite.

The reaction is balanced by adding coefficients to ensure that there are equal numbers of atoms of each element on both sides of the equation.

Thus, the balanced neutralization equation is HClO(aq) + CsOH(aq) → CsClO(aq) + H2O(l)

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The spatial arrangement of the atoms in the ozone molecule (\(O_{3}\)) is angular, which is option b).

The ozone molecule consists of three oxygen atoms bonded together. The central oxygen atom is double bonded to the other two oxygen atoms, forming an O=O-O structure.

Due to this arrangement, the ozone molecule has a bent or angular shape.

The presence of the lone pair of electrons on the central oxygen atom creates repulsion between the electron pairs, causing the two O-O bonds to push slightly away from each other, resulting in an angular molecular geometry.

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The mass of a pure substance represents a specific number of pure substance 'molecules', as defined by molecular weight. The relative atomic mass (atomic weight) in grams/mole (g/mol) is the molar mass of a substance, which means it is the mass of one mole of that substance.

436 kelvin = C. 163 °Celcius

To convert from Kelvin (K) to Celsius (°C), you need to subtract 273.15 from the given temperature in Kelvin.

In this case, to convert 436 K to °C, you would perform the following calculation:

436 K - 273.15 = 162.85 °C

Therefore, 436 K is equivalent to 162.85 °C.

The Kelvin scale is an absolute temperature scale where 0 K represents absolute zero, the point at which all molecular motion ceases. The Celsius scale, on the other hand, is a relative temperature scale with 0 °C representing the freezing point of water and 100 °C representing the boiling point of water at standard atmospheric pressure.

When converting from Kelvin to Celsius, we subtract 273.15 because the Kelvin scale starts at absolute zero and the Celsius scale starts at the freezing point of water.

In this case, the conversion tells us that a temperature of 436 K is equivalent to 162.85 °C, indicating that it is a relatively warm temperature on the Celsius scale. Therefore, Option C is correct.

The question was incomplete. find the full content below:

436 k = ___ °C

A. 709

B. 336

C. 163

D. 536

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Answer:

ecology

Explanation:

Ecology is the study of the interactions between organisms and their environment (biotic and abiotic) •

Answer:

ecology

Explanation:

Ecology is the study of the interactions between organisms and their environment

a) The graph shows that the substance takes longer to boil than to melt. One reason for this is that boiling requires more energy than melting.

b) The heating curve of pure water shows the changes in temperature as water is heated. When water is initially heated, it absorbs heat energy, causing its temperature to rise until it reaches its boiling point.

a. When a substance melts, its particles absorb energy, causing the bonds between them to weaken and eventually break, causing the substance to transition from a solid to a liquid state. However, during boiling, not only must the particles absorb energy to break their bonds, but they must also overcome the pressure of the surrounding atmosphere, which keeps them in their liquid state. This means that boiling requires more energy than melting, which is why it takes longer for a substance to boil than to melt.

b. As water continues to be heated, it undergoes a phase transition from a liquid to a gas, with its temperature remaining constant during this process. Once all of the water has boiled off, the temperature begins to rise again as the energy is absorbed by the container or the surrounding environment.In a heating curve of pure water, the x-axis represents temperature, while the y-axis represents heat energy. The curve starts at the initial temperature of the water, then rises until it reaches the boiling point. At the boiling point, the curve remains horizontal until all of the water has boiled off. After this, the curve rises again, showing the energy absorbed by the container or environment. The curve will be similar to an inverted U-shape, with a flat portion in the middle.

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Answer:

Explanation:

a substance's enthalpy of fusion tells you how much heat is needed in order to convert

1 g

of said substance from solid at its melting point to liquid at its melting point.

In water's case, an enthalpy of fusion equal to

333.55 J g

−

1

tells you that

1 g

of ice at

0

∘

C

can be converted to

1 g

of liquid water at

0

∘

C

by supplying

333.55 J

of heat.

Your ice cube has a mass of

55.0 g

, which means that it will require

55.0

g

⋅

=

Δ

H

fus



333.55 J

1

g

=

18,345.25 J

Rounded to three sig figs, the number of sig figs you have for the mass of the ice cube, the answer will be

heat needed

=

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

18,300 J

a

a

∣

∣

−−−−−−−−−−

Answer:

c I hope this helps u sorry if I'm wrong

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:3

Explanation:

In the balanced reaction of the combustion of nitric oxide (NO), two bonds are broken.

Nitric oxide (NO) is composed of a nitrogen atom bonded to an oxygen atom. During combustion, NO reacts with oxygen (O2) to form nitrogen dioxide (NO2). The balanced chemical equation for this reaction is:

2 NO + O₂ → 2 NO₂

In this reaction, there are two molecules of nitric oxide (NO) on the left-hand side of the equation. Each nitric oxide molecule has one nitrogen-oxygen bond, so there are a total of two bonds in the reactants.

On the right-hand side of the equation, there are two molecules of nitrogen dioxide (NO2). Each nitrogen dioxide molecule has two nitrogen-oxygen bonds, so there are a total of four bonds in the products.

To balance the equation, two nitric oxide molecules are needed to produce four nitrogen dioxide molecules. This means that during the reaction, two nitrogen-oxygen bonds are broken in the reactants, and four new nitrogen-oxygen bonds are formed in the products.

In summary, in the balanced reaction of the combustion of nitric oxide, two bonds are broken.

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Answer: 4.91 kJ

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

\(Q=m\times c_l\times (T_(f,l)-T_(i,l))+m\imes L+m\times c_v\times T_(f,v)-T_(i,v)\)

Q = Heat absorbed = ?

m= mass of mercury = 48.5 g  = 0.0485 kg

c = specific heat capacity = \(0.14kJ/kgK\)

L = heat of vaporization = 59.2 kJ

Initial temperature of liquid mercury = \(T_i\) = 400 K

Final temperature of mercury vapor = \(T_f\)  = 700 K

Putting in the values, we get:

\(Q=0.0485\times 0.14\times (629.88-400)+0.0485\times 59.2+0.0485\times 0.14\times (700-629.88)\)

\(Q=1.56+2.87+0.476\)

\(Q=4.91kJ\)

Answer:

16.2 kj

Explanation:

1.56kj + 14.31kj + 0.34kj

The molar solubility of Ca(OH)₂ in 0.05m Cacl₂ =  4.42 × 10⁻¹⁰ when concentration of Ca₂ is 0.06685 .

                          Ca(OH)₂ + 2HCl   → CaCl₂ + 2H₂O

So,

2 mol HCl neutralises in  1 mol Ca(OH)₂.

Part  1

Volume of HCl = 19.45 mL

                                  Moles = Molarity × Volume (L)

                                Moles of HCl = 0.05 M × 0.01945 L

                                           = 0.00097 mol

Now,

2 mol HCl : 1 mol Ca(OH)₂

1 mol HCl : 0.5 mol Ca(OH)₂

0.00097mol : 0.000485 mol Ca(OH)₂

So,

[Ca(OH)₂] = 0.000485 M

Now,

                                  1 mol Ca(OH)₂ : 2 mol OH-

So,

                                   [OH⁻] = 2 × [Ca(OH)₂]

                                       = 0.00097 M

Similarly evaluating  for part 2 we get-

[OH⁻] = 0.00095 M

Avg [OH⁻] = 0.00096 M

                    [Ca²⁺]                                         [OH⁻]

Initial              0                                                   0

Change             +x                                         +2x

Equilibrium      x                                                   2x

Now,

2x = 0.00096 M

x = 0.00048 M

So,

[Ca²⁺] = 0.00048 M

Now,

                                            Ksp = [Ca2+] × [OH-]²

                                                = x × (2x)²

                                                     = 4x³

                                                = 4.42 × 10⁻¹⁰

A substance's molar solubility is expressed as the molecular weight of the solute dissolved in one liter of solution. The number of ions dissolved per liter of solution is referred to as molar solubility. Here, dissolvability addresses the quantity of particles broke down in a given measure of dissolvable. The solvency (by which we typically mean the molar dissolvability ) of a strong is communicated as the centralization of the "broke down strong" in a soaked arrangement.

Temperature, pressure, and the solid's polymorphic form all affect solubility. Thermodynamic solvency is the convergence of the solute in immersed arrangement in balance with the most steady gem type of the strong compound.

Incomplete question :

0.05 M CaCl2 270C 0.0500 M Temperature of Ca(OH)₂ in 0.05 M CaCl₂: Concentration of standard HCl solution: Calculate the (OH"! from the titration data and the stoichiometry of the dissolution process to determine the molar solubility of Ca(OH), in 0.05 M CaCl₂ Report Table KSP.5: Titation Calculations (calcium hydroxide solubility in CaCl₂ solution) Table view List view Titration of saturated Ca(OH), in CaCl, with HCI Trial 1 Trial 2 19.45 Final buret reading (ml) Initial buret reading (mL) 19.00 0.00 0.00 Volume of HCl added (m) Concentration of OH" (M) (2pts) Average (OH) Complete the following ICE table using your titration data and the stoichiometry of the dissolution reaction. Report Table KSP.6: ICE Table: Solubility of Ca(OH)₂ in 0.05 M CaCl₂ Table view Equilibrium concentrations of Ca²+ and OH Ca(OH)₂ [ca?) List view [он1 Choose Choose- Choose Choose Initial Choose Choose Choose Choose Change Choose Choose Choose Choose Equilibrium (2pts) Concentration of Ca? (M) (2pts) What is the molar solubility of Ca(OH)₂ in 0.05 M CaCl

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Nasser and Buti are liable for the debts and other financial obligations of their company under the Commercial Companies Law of UAE.

Article 73 states that a partner in a partnership company is jointly liable with the company for the company's obligations. Hence, both the partners are responsible for the debts and obligations of the company.

2. No, the appointment of Ahmad, a non-partner, as a manager of the company was not in accordance with the law. Article 154(1) states that a manager must be a partner in the limited liability company or a shareholder in a public joint-stock company. As Ahmad is not a partner, his appointment as a manager is not valid.

3. Victor's liability for debts and other financial obligations of the company is limited as he is a shareholder of the company and not a partner. Article 72 states that the liability of a shareholder is limited to the value of the shares that he holds. Therefore, Victor's liability is limited to the value of his shares.

4. Yes, Viktor has acted in contravention of the law by performing managerial duties and entering deals on behalf of the company. Article 154(2) states that a manager must not perform any activities that are not related to the company's business or have the potential to cause harm to the company. By performing managerial duties and entering deals on behalf of the company, Viktor has violated this provision.

5. Yes, Ahmad violated the law by withdrawing the 50,000 AED from the company's account. Article 172(1) states that a manager must not withdraw any amount from the company's account without the approval of the general assembly. As Ahmad withdrew the amount without the approval of the general assembly, he violated the law.

6. Yes, Ahmad's dismissal was lawful and in accordance with the law. Article 159 states that a manager can be dismissed by a resolution of the general assembly. As Ahmad was dismissed by a resolution of the general assembly, his dismissal was lawful.

7. Global Domination LLC has joined the company as a shareholder. The transfer of shares is considered effective as per Article 83, which states that the transfer of shares is effective from the date of registration in the commercial register.

Incomplete question :

Answer the following questions with specific reference to relevant Articles of the Commercial Companies Law: 1. What is the liability of Nasser and Buti for the debts and other financial obligations of their company? (2 points)

2. Was the appointment of Ahmad, a non-partner, as a manager of the company in accordance with the law? (1 point)

3. What is Victor's liability for debts and other financial obligations of the company? ( 2 points)

4. Has Viktor acted in contravention of the law by performing managerial duties and entering deals on behalf of the company? (1 point)

5. Did Ahmad violate any rules by withdrawing the 50,000 AED from the company's account? (1 point)

6. Was Ahmad's dismissal lawful and in accordance with the law? (1 point)

7. In what capacity has Global Domination LLC joined the company? Is the transfer of shares considered effective? (2 points)

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Structures that can be drawn to represent the covalent bonding in a molecule that has more than one position in the molecule for a multiple bond are known as Position Isomers.

Position isomers are isomers with same chemical formula but the functional group is attached to different position of carbon in different structures.

Example-

Hex1-ene , Hex2-ene, Hex3-ene are position isomers with double bond on first, second and third carbon respectively as shown below-

\(CH_2= CH-CH_2-CH_2-CH_2-CH_3\\CH_3-CH=CH-CH_2-CH_2-CH_3\\CH_3-CH_2-CH=CH-CH_2-CH_3\)

Other examples are pent1-yne and pent2-yne where triple bond is on first and second carbon respectively.

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Answer:

Angel Fish!

Explanation:

Answer:

Angel fish, the other person answered first tho.

Explanation:

Answer: The intermolecular forces in a sample of I2 at STP are stronger than the intermolecular forces in a sample of F2 at STP.

Explanation:

At STP, I2 is present in a solid state, where its molecules are attracted to one another and held together in a crystal form. On the other hand, at STP, F2 exists in a gaseous state, which means its molecules are only weakly attracted to one another. Since it requires more energy to hold a substance in solid form, this means that the intermolecular forces in a sample of I2 must be stronger than those in a sample of F2 at STP.

A saturated solution is one that contains all of the solute that may possibly dissolve in it. The greatest quantity of sodium chloride that may dissolve in 100 g of water at 20 oC is 36.0 g.

What is an illustration of a solution?

A homogenous combination of two or more components with particles smaller than 1 nm is referred to as solution. Solutions take a variety of forms, include carbonated water, sugar and salt mixtures, and others.

What exactly are solutions?

a procedure of activity for resolving an issue. a solution to with an issue explanation. more specifically: a collection of variable values that satisfy an equation. an action or a procedure that transforms a material into a solid, liquid, or gas

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i have no idea  can somebody help me too

Answer:

Carbon dioxide is added to the atmosphere by human activities. When hydrocarbon fuels (i.e. wood, coal, natural gas, gasoline, and oil) are burned, carbon dioxide is released. During combustion or burning, carbon from fossil fuels combine with oxygen in the air to form carbon dioxide and water vapor.Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas. Each year, five and a half billion tons of carbon is released by burning fossil fuels.Carbon dioxide causes about 20 percent of Earth's greenhouse effect; water vapor accounts for about 50 percent; and clouds account for 25 percent.Likewise, when carbon dioxide concentrations rise, air temperatures go up, and more water vapor evaporates into the atmosphere—which then amplifies greenhouse heating

The 1H NMR signal for an OH or NH proton usually does not exhibit spin-spin splitting because these protons exchange rapidly with other protons in solution.

This exchange leads to broadening of the NMR signal, making it difficult to observe spin-spin splitting. However, if the exchange rate is slowed down, spin-spin splitting may be observed.

                            Additionally, if the OH or NH proton is part of a larger molecule or functional group, the surrounding atoms and chemical environment can affect the NMR signal and potentially lead to spin-spin splitting.
The statement is true. The 1H NMR signal for an OH or NH proton typically does not exhibit spin-spin splitting due to the rapid exchange of these protons with the surrounding solvent, which effectively averages out the spin-spin interactions. This results in a broad, singlet peak for these types of protons in the NMR spectrum.

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