9. Which of the following are diatomic elements?

Bromine
lodine
Boron
Hydrogen

The only ion that is seen to be a negative ion in cobalt III sulfide is the sulfide ion.

The term anion just means a negative ion. We know that when we have an ionic compound, the ionic compound would have a positive ion which would have a plus sign and a negative ion which would have a minus sign.

We have to look at the compound that is called cobalt sulfide. there are two ions here, the cobalt III ion and the sulfide ion. The cobalt III ion is positive while the sulfide ion is negative.

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The  spin quantum number will be 2 and 2.5 and multiplicity in each case will be 5 and 6.

The angular momentum of such an electron is described by its spin quantum number (ms). An electron carries orbital angular momentum in addition to angular momentum around its axis of rotation. The Spin Quantum Number (s) really does have a magnitude (1/2) and a direction (+ or -) since angular momentum would be a vector.

(i) If an atom has 4 electrons then it will have total

Total spin quantum number = 1/2+1/2+1/2+1/2 = 4/2=2

Multiplicity = 2S+1= 2×2+1=5

(ii)  If an atom has 5 electrons then it will have

Total spin quantum number = 1/2+1/2+1/2+1/2+1/2 = 5/2 = 2.5

Multiplicity = 2S+1= 2×2.5+1=6

Therefore, the spin quantum number will be 2 and 2.5

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Answer:

a) gain one electron

Explanation:

When the chlorine atom reacts with the sodium atom, it creates NaCl. Sodium would be your cation and chlorine would be your anion. A sodium atom (Na) has a 1+ charge while the chlorine atom (Cl) has a 1- charge. As a result, sodium would lose a valence electron causing chlorine to gain a electron.

Reaction Ni²⁺(aq) + 6NH₃(aq) ⇌ [Ni(NH₃)₆]²⁺ will experience a shift towards the products in equilibrium position when the concentration of Ni²⁺ is increased.

According to Le Chatelier's Principle: When the equilibrium is stressed, the response changes to relieve the stress. This means that adding a reactant moves the equilibrium away from the reactant to the right. Adding a product moves the equilibrium away from the product and to the left.

Equilibrium type:

As the concentration of Ni²⁺(aq) increases, the system attempts to reach equilibrium by reducing the increased coefficient according to Le Chatelier's principle. To do this, the concentration of Ni²⁺(aq) must be lowered. Therefore, it is necessary to lower the Ni²+(aq) concentration by promoting forward reaction.

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The given question was incomplete so the complete question is as follows:

Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of Ni2+ is increased? View Available Hint(s) Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of is increased?

Ni(OH)₂(s)⇌Ni²⁺(aq)+2OH⁻(aq)

[Ni(H2O)₆]²⁺(aq)+3En(aq)⇌[Ni(En)₃]²⁺(aq)+6NH₃(aq)

Ni²⁺(aq)+6NH₃(aq)⇌[Ni(NH₃)₆]²⁺

NiS(s)⇌Ni²⁺(aq)+S²⁻(aq)

The energy of a photon whose frequency is 5.94 × 10¹⁷ Hz is 3.94 × 10-¹⁶J.

The energy of a photon wave can be calculated by using the following formula:

E = hf

Where;

According to this question, a photon has a frequency of 5.94 x 10¹⁷ Hz. The energy can be calculated as follows:

E = 6.626 × 10-³⁴J/s × 5.94 x 10¹⁷ Hz

E = 3.94 × 10-¹⁶J

Therefore, 3.94 × 10-¹⁶J is the energy of the photon.

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The rate constant for the reaction is the relation between the concentration of the reactant and the chemical rate of reaction.

The rate constant of the chemical reaction is the proportionality constant  that describes the relationship between the concentration of the reactants and the chemical rate of reaction. The symbol of rate constant is k. Rate is depends on the temperature.  unit for the zero order reaction is : L⁻¹ s⁻¹. unit of rate constant for the first order reaction is : s⁻¹. unit for the rate constant for second order reaction is : mol⁻¹ L s⁻¹.

Thus, The rate constant for the reaction is the relation between the concentration of the reaction and the chemical rate of reaction.

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Polyatomic ion is OOH

Polyatomic ion are ion which consist of more than one atom and atom in a polyatomic ion are usually covalently bonded to one another and therefore stay together as a single or charged unit and here OOH there are two oxygen atom and one hydrogen atom that's it is polyatomic ion

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the maximum number of sterioisomers that are possible for bystolic was about 10 sterioisomer

what is bystolic ?

Beta-blockers include Bystolic (Bistolic). It functions by enabling the heart to beat more gradually and weakly, reducing the volume of blood it pumps out, and thus reducing blood vessel pressure. This lessens the strain on the heart and lowers blood pressure while enhancing cardiac pumping efficiency. Additionally vasodilating, bystolic (Bistolic). It thereby prevents the muscles from contracting, keeping the blood vessels open. Blood can flow more freely as a result of relaxed blood vessels.

the maximum number of sterioisomers that are possible for the structure of bystolic drug was 10 sterioisomers

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2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]

The first dissociation of phosphoric acid involves the species phosphoric acid, H2 PO4, and dihydrogen phosphate, H2 PO. The formula for the acid dissociation constant is: Ka, =2.42

the logarithm of the log On both sides of the mentioned equation, ka1 =

Pн = PKA + log [H, PO4)

Using definitions

[H3PO4] The renderson equation mentioned above will be utilized to determine the relative concentrations. log PH - Pka, 2.42; [H2 PO] =0.3

I log x = 2 = 109

Thus, X= 2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]

Dihydrogen phosphate is present at higher concentrations than phosphoric acid.

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The electron dot structure that correctly illustrates diatomic nitrogen with a triple bond is of diatomic nitrogen which is N≡N.

A Lewis Structure is a simplified representation of the valence shell electrons in a molecule. It is used to show the arrangement of the electrons is arranged around atoms in a molecule.

Usually in Lewis Structure, Electrons are represented by dots but in the case of bonds such as given in the given question, they are represented by lines.

Thus the electron dot structures that correctly illustrate diatomic nitrogen with a triple bond is of diatomic nitrogen which is N≡N.

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The new pressure will be 1.45atm.

Ideal gas equation gave a relation between pressure, temperature and volume. It can be expressed as:

PV=nRT

Where, P is pressure, V is volume and T is temperature

The given data:

[tex]T_{1}[/tex] = 280K

[tex]T_{2}[/tex]= 406K

[tex]P_{1}[/tex] = 1 atm

[tex]P_{2}[/tex] = ?

The amount of unknown pressure can be determined by using the formula:

P1/T1=P2/T2....(i)

Now, put the values of given data in above equation.

P2= P1T2/T1

P2=1×406K / 280

P2 = 1.45atm

Therefore, the new pressure will be 1.45atm

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The result of the test is that the smaller object will have a greater change in motion. Option A

In the simplest sense of the word, a force could be regarded as a push or a pull. We can see that the object irrespective of the mass of the object would continue to be at rest until it is acted upon by a force.

In this question, we are told that Joey is thinking about applying an equal push force to two objects, one with a small mass, and one with a large mass. The force that could move the small mass may not move the large mass due to inertia.

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The solubility of the strontium iodate is 3.1 * 10^-3 M.

The term solubility has to do with the amount of a solid that is dissolved in water. We know that there are some substances that are able to dissolve better in water than others.

We now have to find the solubility of the strontium iodate from the following;

Ksp = [x] [2x]^2

Ksp = 4x^3

The solubility of the substance is x.

x= ∛Ksp/4

x =∛ 1.14 x 10^-7/4

x = 3.1 * 10^-3 M

The solubility of the solid is obtained as  3.1 * 10^-3 M.

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The pOH of this solution is 0.3 and the pH of the solution is 13.3 .

What is pH ?

The pH of a food is a direct function of the free hydrogen ions present in that food. Acids in food release free hydrogen ions. Hydrogen ions give acidic foods their characteristic sour taste. Therefore, pH can be defined as a measure of free acid. More specifically, pH is defined as the negative logarithm of hydrogen ion concentration. The pH range is 0 to 14. The pH of pure water is exactly 7, so pH 7 is neutral. Values ​​less than 7 are acidic. Values ​​above 7 are basic or basic.

Foods are generally classified as “acidic foods” (low pH, pH 4.6 or less) or “weakly acidic foods” (high pH, ​​pH 4.6 or higher). Safe food storage is determined by the pH of the food. Acidic foods such as fruit and pickles can be safely canned in a tin can with a hot water bath. A combination of acid and hot water (212°F) destroys perishable organisms such as mold and yeast. Proper cooking water canning processes are important to prevent the growth of acid-tolerant molds and yeasts that can lead to elevated pH levels. The pH of borderline foods such as figs and tomatoes can easily exceed 4.6, so lemon juice or citric acid should be added before canning with boiling water. Low-acid foods such as vegetables and meat should be processed in a pressure preserver for safety.

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The statement best describes what Granger believes to be the major difference between man and the phoenix: that the phoenix recognizes when they have made a mistake and eventually will learn not to repeat it. Meanwhile, although a man recognizes his fault, he will continue to repeat them.

What does Granger say about the men and phoenix comparison?

Phoenix is a mythological creature that would burn itself to death only to be reborn from the ashes. As well as humans, we tend to cyclically destroy ourselves and our societies only to build them up again. Granger hopes that eventually, men will learn the lessons from history and stop destroying society.

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The concentration of solution of sodium hydroxide is  4 g/dm³ as per the molar concentration concept, to convert mole/dm³ to g/dm³ multiply the concentration by molar mass, which is 40 g.

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.

The molar mass of sodium hydroxide is 40 g thus, concentration in mole/dm³×40, that is 0.10×40= 4 g/dm³.

Thus , the concentration in g/dm³ is 4 g/dm³.

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1.81 liters of carbon dioxide are produced when 5.00 grams of hydrogen bicarbonate breaks down.

Mass of hydrogen bicarbonate (H₂CO₃) = 5.00 g

Molar mass of hydrogen bicarbonate = 62 g/mol

Molar mass of carbon dioxide = 44.01 g/mol

Density of CO₂ = 1.97 g / L

Temperature = 25 0C

Pressure = 1.24 atm

Volume of CO₂ = ?

Write the balanced chemical equation

    H₂CO₃ →  CO₂ + H₂O

The molar ratio of hydrogen bicarbonate to carbon dioxide is 1 : 1

It means that when one mole of hydrogen bicarbonate decomposes it will produce one mole of carbon dioxide

Now we will find out the number of moles of hydrogen bicarbonate

    number of moles = mass / molar mass

    number of moles of H₂CO₃ = 5.00 g / 62 g/mol

    number of moles of H₂CO₃ = 0.081 mol

Number of moles of H₂CO₃ = number of moles of CO₂

Hence the number of moles of CO₂ = 0.081 mol

Now find out the mass of CO₂

    mass = number of moles × molar mass

    mass of CO₂ = 0.081 mol × 44.01 g/mol

    mass of CO₂ = 3.565 g

Convert mass to volume

    volume = mass / density

    V of CO₂ = 3.565 g / 1.97 g / L

    V of CO₂ = 1.81 L

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Answer:

Explanation:nitrous acid

The melting point of the sample if it is not dried completely after filtering the recrystallized product will have a broad range and will occur at lower range than the actual value.

What is melting point?

Melting point is the temperature at which the solid form of a given substance changes to the liquid form at atmospheric pressure. It is important because, by using the physical property of a substance the substance can be identified.

The sharp range melting point of the substance indicates the purity of the substance. If the sample is not dried completely after recrystallisation, the melting point will have a broad range.

Therefore, if the sample given is not dried completely, it will be impure and the decreases the melting point of the substance. So the actual melting point of the substance cannot be determined.

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The final temperature of the mixed water is 17.43°C.

Principle of Calorimeter:

The body at a higher temperature releases heat while the body at a lower temperature absorbs heat. The principle of calorimetry indicates the law of conservation energy, i.e. the total heat lost by the hot body is equal to the total heat gained by the cold body.

From the calorimeter principle we have:

heat loss by hot water = Heat gained by the cold water

The formula for the heat gained or loss:

Q = m.c.ΔT

Q = heat gained or loss

c = specific heat

ΔT = temperature change

m1 = 100g

m2 = 75g

m2c ΔФ2 = m1c ΔФ1

75 × (71.6-T) = 100× ( T - 23.2)

5370 - 75T = 100T - 2320

175 T = 3050

T = 17.43°C

Therefore the final temperature is 17.43°C

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The empirical formula of the compound C₄H₁₀O₁.

The empirical method of a chemical compound is the simplest entire range ratio of atoms present in a compound. The empirical formula of a compound is the most effective whole variety ratio of atoms of each detail in the compound.

Step 1: decide the masses. Step 2: decide the variety of moles by dividing the grams by means of the atomic mass. Step 3: Divide the wide variety of moles of every detail through the smallest quantity of moles. Step 4: Convert numbers to complete numbers.

                                         divide by smallest

64.9% C /12 = 5.4             5.4/ 13.5  = 4

13.5% / 1 H  = 13.5             13.5 /1.35  = 10

21.6% / 16 O  = 1.35          1.5/1.5 = 1

Empherical formula = C₄H₁₀O₁

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Answer: 6.59 x 10^24 formula units

Explanation: Formula units are another word for atoms, meaning we use Avogadro's number (6.022x10^23 atoms per mole), we multiply 10.95 by Avogadro's number to get the answer

Apply to a gas molecule's kinetic energy is not the same as telling you the speed, so calling a thermometer a speedometer for atoms is deceptive.

Uniformly, if a sample of water is put down in the freezer, its molecules begin to move slower (with a lower speed) and this is thought the back by a lower thermometer reading. It is in this feeling that a thermometer can be thought of as a speedometer. As John Rennie broaches in the comments, thermometers work for solids, liquids, and gasses, whereas the temperature is comparable to the average. A thermometer would be an average speedometer for the primary molecules of a substance or structure, not specifically separate atoms.

So we can conclude that thermometers compute the average velocity of atoms in a given material or order volume.

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The phrases that describes the similarities between problem space theory and how the brain looks at problems is option C: They can occur quickly or slowly.

The category of problem-solving techniques used in social science includes the problem space theory. The problem space theory employs the strategy of characterizing the issue before seeking a resolution. The focus of a problem space is on the stages and objectives involved in solving a problem rather than providing details of a solution.

Note that Your heart rate increases as your brain releases a surge of adrenaline, causing you to become stiff and shake. Despite the absence of difficulties, the brain is programmed to find solutions. The brain invents a new problem to remedy when there is nothing to tackle.

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See full question below

Which of the following phrases describes the similarities between problem space theory and how the brain looks at problems?

They have only three steps.

They can only be used in a laboratory setting.

They can occur quickly or slowly.

They are biased against the scientific method.

The molecule cis-1,2-dibromocyclopentane comes under Stereoisomers.

Stereoisomers are molecules that have the same molecular formula, the same atom connectivity, but they differ in the relative spatial orientation of the atoms.

In cis-1,2-dibromocyclopentane, both bromine atoms are on the same "face" of the cyclopentane ring.

The rate of reaction when 0.4g of zinc trioxocarbonate (iv) reacted with dilute hydrochloric acid to produce zinc chloride and carbon (iv) in  2 minutes is 0.0016 mol/min.

The rate of a reaction is the time taken for product molecules to appear or the time taken for reactant molecules to be converted.

Or

The equation of the reaction is given below:

ZnCO₃ (s) + 2 HCl (aq) ---> ZnCl₂ (aq) + H₂O (l) + CO₂ (g)

Molar mass of zinc carbonate = 125.39=8 g/mol

Moles of zinc carbonate converted = 0.4 / 125.38

Moles of zinc carbonate converted = 0.0032 moles

Time taken = 2 minutes

Rate of reaction = 0.0032/ 2

Rate of reaction = 0.0016 mol/min

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The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.

The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).

Volume = 45.0 L

Temperature =87  = (87.0 + 273) K = 360 K

Pressure = 950 mm Hg (1 mm Hg = 0.00131579 atm) = 1.25 at

The following formula is used to calculate moles.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

As shown, enter the values into the formula above.

PV = nRT
1.25 atm* 45.0 L  = n * 0.0821 L atm /mol K * 360 K

n = 1.25 atm* 45.0 L / 0.0821 L atm /mol K * 360 K

n = 56.25 / 29.556

n = 1.90 mol

The mass of a substance divided by its molar mass is expressed in moles. The following formula is used to compute the mass of (molar mass = 37.99 g/mol).

Moles  = mass / molar mass

1.90 mol =  mass/37.99 g/mol

Mass = 72.181 g

The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.

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The products for the balanced reaction of hydrochloric acid (HCL) and magnesium hydroxide (mg(oh)2) are salt (magnesium chloride ) and water.

The balanced equation is:

[tex]Mg(OH) _{2}+2HCl - MgCl_{2}+2H_{2} O[/tex]

What happens when magnesium hydroxide reacts with HCl?

Does magnesium hydroxide dissolve in HCl?

Magnesium Hydroxide is soluble in dilute hydrochloric acid.

Thus, products obtained from the reaction are salt and water.

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Answer:

Group VII are called halogens because react with metals to form salts