Hydrogen sulfide is slightly soluble in water forming both the hydrogen sulfide ion and the sulfide ion.H2S(g) + H2O(l) ⇄ HS−(aq) + H3O+(aq)HS−(aq) + H2O(l) ⇄ S2−(aq) + H3O+(aq)Which species is showing amphiprotic behaviour in these reactions?HS-H2OH3O+H2S

Empirical formula = C : H : O = moles of carbon / smallest number of moles : moles of hydrogen / smallest number of moles : moles of oxygen / smallest number of moles

The empirical formula of a compound can be determined by analyzing the masses of the elements in the compound. In this case, we are given that the combustion of 3.69 g of the compound yields 5.40 g of CO2 and 2.22 g of H2O.

To determine the empirical formula, we need to find the moles of carbon (C), hydrogen (H), and oxygen (O) in the given masses of CO2 and H2O.

First, let's find the moles of carbon in 5.40 g of \(CO_{2}\)
Molar mass of \(CO_{2}\) = 12.01 g/mol (C) + 2(16.00 g/mol) (O)

                                 = 44.01 g/mol
Moles of carbon = mass of CO2 / molar mass of \(CO_{2}\) = 5.40 g / 44.01 g/mol = 0.1227 mol

Next, let's find the moles of hydrogen in 2.22 g of \(H_{2}O\)
Molar mass of \(H_{2}O\) = 2(1.01 g/mol) (H) + 16.00 g/mol (O) = 18.02 g/mol
Moles of hydrogen = mass of \(H_{2}O\) / molar mass of \(H_{2}O\) = 2.22 g / 18.02 g/mol = 0.1231 mol

Now, we can determine the moles of oxygen in the compound by subtracting the sum of the moles of carbon and hydrogen from the moles of oxygen:
Moles of oxygen = 3.69 g / molar mass of compound - (moles of carbon + moles of hydrogen)

Lastly, we can determine the empirical formula by dividing the number of moles of each element by the smallest number of moles obtained:
Empirical formula = C : H : O = moles of carbon / smallest number of moles : moles of hydrogen / smallest number of moles : moles of oxygen / smallest number of moles

Please note that without the actual masses of each element in the compound, we cannot determine the exact empirical formula. However, the steps mentioned above will help you determine the ratio of the elements in the compound.

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Answer: 2.81%

Explanation:

If the abundance of Fe-56 is 91.75%, then the other two isotopes have a combined abundance of 100%-91.75%=8.25%.

If we let the abundance of Fe-54 be x, then the abundance of Fe-57 is 0.0825-x. Substituting this into the atomic mass formula, we get:

\(55.85=(55.93)(0.9175)+(53.94)(x)+(56.94)(0.0825-x)\\55.85=51.315775+53.94x+4.69755-56.94x\\55.85=56.0133-3x\\-0.1633=-3x\\x=\frac{-0.1633}{-3} \approx 0.0544\)

If x=0.1633/3, this means that 0.0825-x=0.0281, so Fe-57 is the rarest isotope, with an abundance of 2.81%

The true statements are: the K⁺ ion is formed when potassium loses one electron.

The Fe⁺² and Fe⁺³ ions have same number of protons.

1) The K⁺  ion is formed when potassium loses one electron.

When an atom loses one electron then it gets a positive charge on it that is why statement 1 is correct.

2) When an atom gains an electron, it becomes a cation.

When an atom gains an electron it becomes an anion so statement  2 is incorrect.

3) The Fe⁺² and Fe⁺³ ions have same number of protons.

Whenever an atom loses or gain electrons then they get charge on them but that changes the number of electrons present in it and not the number of protons in them. So, statement 3 is correct.

4) The Cu and Cu²⁺ ions have the same number of electrons.

When an atom gains electrons then the number of electrons in it changes. So, statement 4 is incorrect.

5) The Cl⁻ and Br⁻ ions have the same number of electrons.

They do not have same number of electrons so it is incorrect.

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Explanation:

Review and Study Material Before Going to Class. ...

Take Good Notes. ...

Practice Daily. ...

Take Advantage of Lab Time. ...

Use Flashcards. ...

Use Study Groups. ...

Break Large Tasks Into Smaller Ones.

reading a variety of chemistry books

Answer:

An ion is an atom or molecule that carries an electric charge.

Ions are identified by the use of a superscript to show the sign and size of their electric charge.

Negatively charged ions are called anions, and positively charged ions are called cations.

Explanation:

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

This process rapidly cools down the reaction and stops it from progressing any further.

In a chemical reaction, stirring is often done to promote uniform mixing of reactants and to increase the rate of the reaction. Stirring helps distribute heat evenly, ensures contact between reactants, and assists in the removal of byproducts.

Quenching is a process used to rapidly cool down a reaction or stop it completely. It is often done by adding a quenching agent, such as a saturated aqueous solution, to the reaction mixture. The quenching agent absorbs excess heat and reacts with any reactive intermediates or products, effectively stopping the reaction.

A saturated aqueous solution is a solution that contains the maximum amount of solute that can be dissolved at a given temperature. This means that no more solute can dissolve in the solution, resulting in a state of equilibrium between the dissolved solute and the undissolved solute.

By adding a saturated aqueous solution to the reaction mixture, the excess heat is rapidly absorbed, and the reaction is quenched. This prevents any further reaction from occurring and allows for the isolation of the reaction products.

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Answer:

the answer is d

Explanation:

i just did it

The characteristic property of ionic compounds is B. They form hard, brittle crystals.

Ionic bond is a chemical bond formed as the result of transfer of electrons from one atom to another.

Ionic bonds are held by strong electrostatic force. Properties of ionic bonds are:

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The element that we can be able to use for the experiment in place of potassium is sodium.

We know that the elements that can be found in the same group does react in the same way. Now we know that we have to look about among the options so that we would be able to know element that is in the same group as potassium.

Given that both sodium and potassium are members of group 1, we have to look out for the element that element thus we have to select sodium.

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Answer:

Modern recorders are most commonly pitched at A=440 Hz, but among serious amateurs and professionals, other pitch standards are often found. For the performance of baroque music, A=415 Hz is the de facto standard, while pre-Baroque music is often performed at A=440 Hz or A=466 Hz.

Explanation:

Answer:

Im going to say sleep

Explanation:

C8 columns refer to chromatography columns that contain a stationary phase consisting of hydrocarbon chains with eight carbon atoms. c8 columns means none of the given options. The correct answer is (d) None of the above.

C8 columns refer to chromatography columns that contain a stationary phase consisting of hydrocarbon chains with eight carbon atoms. These carbon chains are typically covalently bonded to a solid support material.

The C8 designation represents the length and composition of the hydrocarbon chains in the stationary phase.

These columns are commonly used in chromatography techniques, such as reversed-phase liquid chromatography, where nonpolar compounds are separated based on their interactions with the hydrophobic stationary phase.

The C8 stationary phase provides moderate retention for analytes with different polarities, allowing for effective separation.

The statement about ionic bonding or the presence of a phenyl group is not applicable to C8 columns.

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Dipole moment is present between atoms that have differences in their electronegativity. These atoms have unequal distribution of positive and negative charges.  

CO₂, BF₃, CCl₄, and BeF₂ have zero dipole moments because the atoms present in these molecules cancel each other's dipole moments and have overall net zero dipole moments.  

CO₂ is a linear and symmetrical molecule. The molecule has two C=O bonds, which are present in opposite directions. The dipole moment of one C=O bond cancels the dipole moment of the other.  

In BF₃, all three B-F bonds have slightly negative charges on fluorine atoms. The charges are balanced in the symmetrical triangular shape of the molecule. Therefore, the dipole moments of the three bonds cancel each other.  

Similarly, CCl₄ and BeF₂ have overall zero dipole moments because these have regular symmetrical structures.

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Answer:

Carbon, hydrogen, oxygen, and nitrogen, with hydrogen present in the greatest proportion

Explanation:

Let's consider the chemical formula of acetaminophen: C₈H₉O₂N. According to this formula, in 1 molecule of acetaminophen there are:

As we can see, the element present in the greatest proportion by number of atoms is hydrogen.

Answer:

b

both objects will receive a certain amount of thermal energy and heat up

the professors affinity for Po has a short half-life.

a) How much energy is released during alpha decay of polonium-210?

b) Po-210 does not have a betat decay mode. But if it did, what would the daughter nucleus be?

A) The energy released during alpha decay of polonium-210 (Po-210) is approximately 5.407 MeV.

b) If Po-210 had a beta decay mode, the daughter nucleus would be lead-210 (Pb-210).

A- Alpha decay occurs when an atomic nucleus emits an alpha particle, which consists of two protons and two neutrons. In the case of polonium-210 (Po-210), the energy released during alpha decay is approximately 5.407 MeV (mega-electron volts). This energy is released as kinetic energy of the alpha particle and can be calculated based on the mass difference between the parent and daughter nuclei using Einstein's equation E=mc².

b) Polonium-210 (Po-210) does not undergo beta decay, but if it did, the daughter nucleus would be lead-210 (Pb-210) beta decay involves the conversion of a neutron into a proton or a proton into a neutron within the nucleus, accompanied by the emission of a beta particle (electron or positron) and a neutrino. However, in the case of Po-210, it undergoes alpha decay as its primary mode of radioactive decay.

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Answer:

I think that the previous answer will help you with this one, Newton´s laws explain it because of the action-reaction law, the resulting forces will be balanced or overloaded in one object, depending of the mass acceleration/speed or force applied to one object.

Explanation:

Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:

F=Air

Explanation:

Because I took the test hope it helps

Answer:

relatable a.f                        

Explanation:

Answer:

Thank you for free point :)

Explanation:

Answer:

There is something wrong with my cell phone. It doesn't have your number in it.

Explanation:

Henry's law constant (KH) for O2 in water at 20°C is 1.28e-3 mol/L atm, and we need to calculate the number of grams of O2 that will dissolve in 2.9 L of H2O that is in contact with pure O2 at 1.19 atm.

The concentration of dissolved gas in the liquid is proportional to the partial pressure of the gas over the liquid. The proportionality constant is known as Henry's Law constant. Henry's law states that at a constant temperature, the solubility of gas in a liquid is proportional to the partial pressure of the gas over the liquid.

The mathematical equation for Henry's law is given by: C = kH P where,C = Concentration of gas in the solution in moles per liter kH = Henry's law constant P = Partial pressure of gas over the solution. To calculate the number of grams of O2 dissolved in 2.9 L of H2O, we will follow these steps:

Step 1: Calculate the concentration of dissolved O2 using Henry's law.C = kH * PC = (1.28e-3 mol/L atm) * (1.19 atm)C = 1.52e-3 mol/L.

Step 2: Calculate the number of moles of O2 that will dissolve in 2.9 L of H2O.n = CVn = (1.52e-3 mol/L) * (2.9 L)n = 4.408e-3 mol.

Step 3: Calculate the mass of O2 that will dissolve in 2.9 L of H2O using the molar mass of O2. Molar mass of O2 = 32 g/mol. Mass of O2 = n * Molar mass of O2Mass of O2 = (4.408e-3 mol) * (32 g/mol). Mass of O2 = 0.141 kg.

Therefore, the number of grams of O2 that will dissolve in 2.9 L of H2O that is in contact with pure O2 at 1.19 atm is 0.141 kg.

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The object that will float higher in the water is the object whose density is 1.21g/cm^3.

The term density is the ratio of the mass to the volume of an object. We know that density is an intrinsic property hence it does not depend on the amount of substance that is present therefore, we could use the density of a substance to identify the substance.

The greater the density of an object, the more the object sinks into the water much farther. We now need to compare the two objects. The object that has the higher density would tend to sink deeper into water.

Thus the object that will float higher in the water is the object whose density is 1.21g/cm^3.

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On the graph,

To know what each letters represents, we must understand what an energy profile diagram is.

An energy profile diagram is a representation of chemical reaction, showing the pathways in which reactants follows to become products.

With the above information, we can say that:

Every reaction has a peak energy. This peak energy is referred to as the activation complex. The activation complex is the highest energy of the reaction. Looking at the diagram, we can see that B is at the peak.

Thus, letter B represents the activation complex

Also, every reaction has activation energy. This is the minimum energy required for a reaction to occur. In profile diagram the activation energy is the energy between the peak (i.e activation complex) and the reactant. from the graph, we can see that letter D lies between the letter B and A.

Thus, we can say letter D is the activation energy

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Answer:

actinide family

Explanation:

Answer:

To calculate the percent yield, you need to know the theoretical yield, which is the maximum amount of product that could be produced based on the starting materials and reaction conditions, and the actual yield, which is the amount of product that was actually obtained in the experiment. The percent yield is then calculated using the following formula:

Percent Yield = (Actual Yield ÷ Theoretical Yield) x 100%

In this case, we don't have information about the theoretical yield or the reaction conditions, but we know that only 44 grams of CO2 were produced. Without additional information, we cannot calculate the percent yield. The theoretical yield could be more or less than 44 grams, and the actual yield could also be more or less than the theoretical yield.

Therefore, we need more information to determine the percent yield.

Yes, 32 fluid ounces (oz) is equivalent to 1 quart (qt) in the US customary unit system.

A fluid ounce is a unit of measurement for liquid volume, while a quart is a unit of measurement for dry or liquid volume. The conversion factor between ounces and quarts is 32, because one quart is equal to 32 fluid ounces. This relationship is defined by the fact that a quart is equal to 32 fluid ounces.

In the US customary unit system, the quart is defined as being equal to one fourth of a gallon, which is equal to 2 pints. The fluid ounce, on the other hand, is defined as 1/128 of a gallon. To convert between fluid ounces and quarts, we can use the conversion factor of 32. For example, if we want to convert 64 fluid ounces to quarts, we can divide 64 by 32, and we get 2 quarts.

In summary, 1 quart is equal to 32 fluid ounces and can be converted by dividing the number of fluid ounces by 32.

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Answer:

4.0 kg

Explanation:

M = W/g = 39.2/9.8 = 4.0 kg

sorry if its wrong-

Answer:Re3(PO4)2 I think I'm wrong

Explanation:

Answer:

the atoms in cyclohexanone are not in the same

Explanation:

but they are in a benzene ring! Cyclohexane has only sigma bonded carbons with bonds that stick out of the plane

Answer:

There are 122.1982401 moles of  H2O in \(7.36*10^{25}\)  molecules of H2O

Explanation:

We know,

\(6.023*10^{23}\)  molecules of H2O contains 1 mole H2O

            1      molecules of H2O contains \(\frac{1}{6.023*10^{23}}\)  mole H2O

∴ \(7.36*10^{25}\) molecules of H2O contains \(\frac{1}{6.023*10^{23}}*(7.36*10^{25})\) moles of H2O

                                                               = 122.1982401 moles of  H2O

∴ There are 122.1982401 moles of  H2O in \(7.36*10^{25}\)  molecules of H2O