When an electron passes through the magnetic field of a horseshoe magnet, the electron's?

As filtrate moves down the loop of Henle, the surrounding interstitial fluid becomes more concentrated than the filtrate, so water leaves the filtrate.

Considering the definition of atomic mass, isotopes and atomic mass of an element, the % composition of each isotope is:

First of all, the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.

The same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.

On the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes. In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.

In this case, the first isotope Gallium - 69 has an atomic mass of 69 and a percent natural abundance of X%. The second isotope Gallium - 71 has an atomic mass of 71 and a percent natural abundance of (100-X)%.

On the other hand, the Relative Atomic Mass of Gallium is 69.8 .

Then, the value of X can be calculated as:

69× X+ 71× (1-X)= 69.8

Solving

69× X+ 71× 1- 71× X= 69.8

69× X+ 71- 71× X= 69.8

69× X- 71× X= 69.8 - 71

- 2× X= -1.2

X= (-1.2)÷ (-2)

X=0.6 which expressed as a percentage is X%= 60%.

So, the % compositon of Gallium - 71 is calculated as (100-X)%=(100 -60)%= 40%

Finally, the % composition of each isotope is:

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The molar mass of a gas if a flask with a volume of 3. 16 L contains 9. 33 grams of the gas at 32. 0°C and 1. 00 atm is  1.17g/mol

Calculation ,

In this question we have to fist find the number of moles of gas by using ideal gas equation and from the help of number of moles we can determine molar mass.

According to ideal gas equation which is also known as ideal law ,

PV = nRT                ...( i )

where P is the pressure of the gas = 1 atm

V is the volume of the gas in the flask with volume =  3. 16 L

R is the universal gas constant = 0.082 atm L/K mol

T is the temperature = 32. 0°C = 32 + 273 = 305 K

n is the number of moles = ?

Putting the value of Pressure P , volume V , temperature T , number of moles n and universal gas constant R in the equation (i) we get ,

1 atm ×3. 16 L = n× 0.082 atm L/K mol ×305 K

n = 1 atm ×3. 16 L / 0.082 atm L/K mol × 305 K = 0.126 mole

number of mole of a gas  = 0.126 mole = given mass/ molar mass

molar mass  = number of moles × Given mass =  0.126 × 9. 33 = 1.17g/mol

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Answer:

can u show the answer it give you for the question

The float property allows the positioning of an element to the right or left of other elements.

In the context of web development and CSS, the "float" property is used to control the positioning of elements within a container. It allows you to move an element to the left or right of its containing element, enabling other elements to flow around it.

When an element is floated, it is taken out of the normal flow of the document, allowing other elements to wrap around it. This can be particularly useful for creating layouts where you want elements to appear side by side or to create text flow around images.

The "float" property can take one of two values: "left" or "right". When an element is set to "float: left", it will move to the left of its containing element, and any subsequent elements will wrap around it on the right side. Conversely, when set to "float: right", the element will move to the right, and subsequent elements will wrap around it on the left side.

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Catalysis is the process of boosting the pace of a chemical reaction by using a catalyst. Catalysts are not consumed in the reaction and so survive it.

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Two properties are :

Bromcresol green is useful as an acidity indicator because it changes to yellow as the pH becomes more acidic

Also, the bromcresol green protons are easily dissociated making the color change visible and relatively quick.

Why is bromocresol green used as an indicator?

Bromocresol green (BCG) is a dye of the triphenyl methane family (triarylmethane dyes). It belongs to a class of dyes called sulfonephthaleins. It is used as a pH indicator in applications such as growth mediums for microorganisms and titrations.

How does a pH indicator work?

pH indicators detect the presence of H+ and OH-. They do this by reacting with H+ and OH-: they are themselves weak acids and bases. If an indicator is a weak acid and is colored and its conjugate base has a different color, deprotonation causes a color change.

What is chemical change and physical change?

Physical changes are reversible and do not produce a new substance. Chemical changes result in the production of a new substance and cannot be reversed.

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[2.8.2] - exists the electron configuration of a potassium ion when it contains created an ionic bond with a bromine ion.

What is electron configuration simple definition?

electronic configuration, also called electronic structure or electron configuration, the arrangement of electrons in orbitals around an atomic nucleus.

What are the 4 types of electron configuration?

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The average rate of a reaction is a good approximation of an instantaneous rate when the concentration is measured during relatively brief time intervals.

At any point during such a little period, the average rate will be extremely near to the instantaneous rate. The average rate will differ from the instantaneous rates inside the period more when time intervals are longer.

The concentration change during a chosen time period is the average rate. When you take the measurements makes a difference.

The rate at a specific moment is known as the instantaneous rate. Finding the slope of the tangent to the concentration vs. time curve at that point yields the answer.

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The pH at 25°c of a 0. 0077 m solution of a weak base with a kb of 6. 2 × 10−9 is 8.8.

The base dissociation constant is termed as Kb. Throughout a base split into ts constituent ions in water is determined by its base dissociation constant.

Kb = [B+] [OH-]/[BOH]

Now, let the concentration of [B+] = [OH-] = x

Given,

Kb = 6. 2 × 10^-9

6. 2 × 10^-9 = x^2/(0.0077-x)

x = 6.909 × 10^(-6)

[B+] = [OH-] = 6.909 × 10^(-6)

As we know that,

pOH = -log [OH-]

pOH = -log( 6.909 × 10^(-6))

pOH = 5.2

As we also know that,

pOH + pH = 14

pH = 14 - pOH

pH = 14 - 5.2

pH = 8.8

Thus we calculated that the pH of the solution is 8.8.

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The reaction shown here is an exothermic reaction.

An exothermic reaction is one in which the energy of the reactants is greater than the energy of the products. This implies that energy is given out in the process. Whether a reaction is endothermic or exothermic shows in the nature of the reaction profile curve.

For an endothermic reaction, the part of the diagram that represents the energy of the products is higher than the part that represents the energy of the reactants. This is clear from the image attached here.

If we look at the reaction graph very well, we will observe that the energy of the reactants is far above that of the products. Thus it follows that the reaction shown here is an exothermic reaction.

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Buffer is a solution that has been known to have an acid and base dissolved with constant hydrogen concentration. If 5 drops of HCl are added to the buffer then the final pH will be 8.64. Thus, option a is correct.

pH has been the concentration that is made of hydrogen or proton ions. The ions have been known to be released from the acids while the bases release the hydroxide ions.

The given buffer has a pH of 8.78, and hence, it is a basic buffer. If the solution of HCl (strong acid) is added to this buffer then the pH will decrease definitely. As only 5 drops are added there will be not much decrease in the pH.

Therefore, option a. the pH of the buffer after addition to HCl will be 8.64.

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Your question is incomplete, but most probably your full question was, A solution containing a buffer has an initial pH of 8.78. If a student adds 5 drops of HCl(aq) to this solution. What would be a reasonable pH for the resulting solution?

It should be noticed that the mole fraction of all the system's components is 1.

the proportion between the moles of one component in a solution or other combination and the total moles of all the components.

In a mixture, a mole fraction is the ratio of molecules of one component. By way of illustration, if the mole fraction of methane in a gas is 0.90, then this implies that 90% of the molecules are methane. Since the amount fractions resemble mole fractions, methane makes up an additional 90% of the mixture.

By dividing the solute's moles by all the other molecules in solution, you may determine the solute's mole fraction.

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They will not necessarily be equal, but they will be constant.

In reversible reactions, dynamic equilibrium refers to a state in which the rate of the forward reaction is equal to that of the backward reaction.

Consdier the reaction below: A + B --> C + D

If the reaction is in dynamic equilibrium, the rate of formation of A and B will be the same as the rate of formation of C and D. However, this does not mean that the concentrations of the reactants and the products will be the same.

Since the rate of forward and backward reactions are equal, it means that the concentration of each of the species will be constant.

Thus, the above reaction is applicable to that of two reacting gases placed in a sealed flask and allowed to reach a dynamic equilibrium.

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They will be equal and constant. They will be equal but continuously changing. They will not necessarily be equal, and they will be continuously changing. They will not necessarily be equal, but they will be constant.

To prevent the system refrigerant from quickly dropping in temperature and pressure, refrigerant recovery should Begin with a liquid

In the refrigeration cycle of air conditioners and heat pumps, refrigerants are working fluids that typically go through numerous phase changes from a liquid to a gas and back again.

In the refrigeration cycle, which cools a place, a refrigerant is a material, frequently a fluid. Refrigerants use the thermodynamic phenomenon of phase transitions, in which a fluid transforms into a gas or vice versa, to absorb heat and then release it to another area.

At room temperature, it is often a gas. Ammonia, sulfur dioxide, and non-halogenated hydrocarbons like propane are further typical refrigerants that are employed in a variety of applications.

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The density of rock weighing 1.705 kg is 3.213 gm/ml.

Explanation:

Given;

Volume of rock = 334.5 ml

Weight of rock = 1.075 kg = 1075 gm

By the formula,

Density = Weight in gm/Volume in ml

              = 1075/334.5 gm/ml = 3.2137 gm/ml

Therefore, density of rock is 3.213 gm/ml.

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Answer:

15.94 g

Explanation:

80 mins is 4 half lives ( 20 min each)

255 * 1/2 * 1/2 * 1/2 * 1/2   = 255 * 1/2^4 = 15.94 g

the bond will break

The bond will dissolve (break) if the electron absorbs a photon and is moved from a bonding molecular orbital to an antibonding orbital since there is no longer an overall stabilizing interaction.

An antibonding molecular orbital is the molecular orbital created by the destructive overlapping of atomic orbitals.

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The original molarity of an aqueous solution of ammonia whose pH is 11. 02 at 25°C is 0.556 M

Calculation ,

Given : pH = 11.5

[tex][H^{+} ][/tex] = [tex]10^{-11.5}[/tex]

[tex][OH^{-} ][/tex] = [tex]K_{w} /[H^{+} ][/tex] = [tex]10^{-14}[/tex]/  [tex]10^{-11.5}[/tex] = [tex]10^{-2.5}[/tex] M

Kb = [tex][NH_{4}^{+} ][OH^{-} ]/[NH_{4} OH][/tex] = [tex](10^{-2.5})^{2} /C[/tex] = 1.8×[tex]10^{-5}[/tex] M

C = 1/1.8 = 0.566 M

So, molarity of an aqueous solution of ammonia is 0.566 M

pH ia a measure of hydrogen ion concentration , a measure of acidity or alkalinity of the solution .pH scale usually range from 0 to 14 Aqueous solutions at 25°C witha pH less rhan 7 are acidic  , whereas , those with pH greater than 7 are basic or alkaline. pOH ia a measure of hydroxide ion concentration , a measure of  alkalinity of the solution .

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Increasing the surface area of the reactant by pelletizing the calcium carbonate, and increasing the concentration of hydrochloric acid resulted in increase in the rate of reaction.

Reaction rate refers to the rate at which reactant molecules are consumed or the rate at which product molecules are formed.

The factors that affect reaction rate include:

Given an experiment to determine effect of surface area of reactants  and concentration on reaction rate of dilute hydrochloric acid and calcium carbonate:

It was observed that increasing the surface area of the reactant by pelletizing the calcium carbonate and increasing the concentration of hydrochloric acid made the reaction proceed faster.

In conclusion, reaction rate increases with increase in surface area.

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Two months later 13.8 milligrams of the barium-131 still be radioactive.

It is expressed as:

[tex]A = A_{0} \times (\frac{1}{2})^{t/T}[/tex]

where,

A = Amount remaining

A₀ = Initial Amount

t = time

T = Half life

Here

A₀ = 0.50g

t  = 2 months = 60 days

T = 11.6 days  

Now put the values in above expression we get

[tex]A = A_{0} \times (\frac{1}{2})^{t/T}[/tex]

   [tex]= 0.50 \times (\frac{1}{2})^{60/11.6}[/tex]

   [tex]= 0.50 \times (\frac{1}{2})^{5.17}[/tex]

   = 0.50 × 0.0277

   = 0.0138 g

   = 13.8 mg          [1 mg = 1000 g]

Thus from the above conclusion we can say that Two months later 13.8 milligrams of the barium-131 still be radioactive.

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Question: Suppose that 0.50 grams of ban that 0.50 grams of barium-131 are administered orally to a patient. Approximately many milligrams of the barium would still be radioactive two months later? The half-life of barium-131 is 11.6 days.

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Answer:

[tex]K_{c} =\frac{[O_{2} ] [SO_{2} ]^{2} }{[SO_{3} ]^{2} }[/tex]

Explanation:

To construct the equilibrium constant, you need the balanced equation:

2 SO₃(g) -----> O₂(g) + 2 SO₂(g)

The equilibrium constant compares the concentrations of the products and the reactants.

The given expression follows this structure:

aA(g) ----> bB(g) + cC(g)

In this equation, the uppercase letters symbolize the molecules and the lowercase letters symbolize their corresponding coefficients in the balanced equation.

The general equilibrium expression looks like this:

[tex]K_{c} =\frac{[B]^{b} [C]^{c} }{[A]^{a} }[/tex]

To be clear, the concentrations in the numerator represent the gaseous products and the concentrations in the denominator represent the gaseous reactants.

Therefore, the equilibrium expression for this equation is:

[tex]K_{c} =\frac{[O_{2} ] [SO_{2} ]^{2} }{[SO_{3} ]^{2} }[/tex]

20 g of [tex]FeSO_4[/tex] contains [tex]7.94 \times 10^{22}[/tex] ions of [tex]Fe^2^+[/tex]

A mole is a unit to measure an amount of any substance which contains as many elementary particles as there in 12 g of Carbon 12.

A mole contains  [tex]6.02214 \times 10^{23}[/tex] particles and this fixed number is called Avogadro’s number.

No. of moles is given by,

[tex]n =\frac{m}{M}[/tex]

where m = Given mass in grams

M = Molar mass

Here,

[tex]FeSO_4 \rightarrow Fe^2^+ + SO_4^2^-[/tex]

No. of moles of  [tex]FeSO_4[/tex]  = [tex]\frac{20g}{151.9gmol^-^1}[/tex] = 0.132 moles

No. of molecules of  [tex]FeSO_4[/tex] = 0.132 x 6.022 x [tex]10^2^3[/tex] = 7.94 x [tex]10^2^2[/tex]

No. of molecules of  [tex]FeSO_4[/tex] = no. of ions of [tex]Fe^2^+[/tex] = no of ions of [tex]SO_4^2^-[/tex]

Thus, no. of ions  [tex]Fe^2^+[/tex] in 20 g of  [tex]FeSO_4[/tex]  is 7.94 x [tex]10^2^2[/tex]

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In order to react with the hydrochloric acid (HCl) created when the hexanediamine combines with the adiptic acid, NaOH was added to the hexanediamine solution. By combining with the HCl to create NaCl and water, the NaOH preserves the pH of the solution. HCl is taken out of the solution and the reaction is pushed in the direction of the products.

A C6 alkane-alpha, omega-diamine is hexanediamine. It serves as a xenobiotic metabolite for humans. It comes from a hydride.

What is the purpose of hexanediamine?

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The correct answer is  C8H8O2.

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The substance that conducts electricity is [tex]NaCl[/tex] dissolved in water.

So, option A is correct one.

When the sodium chloride dissolve in water , the sodium atoms and chlorine atoms separates under the presence of water molecules and exist as sodium cation and chloride anion . Now , they are free to move around in the water as positively and negatively charged ions . This separation of charge allows the solution to conduct electricity.

The solid [tex]NaCl[/tex] and solid sugar does not conduct electricity because it is not dissolve in water . Similarly, sugar dissolved in water does not conduct electricity .

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Cyclic bromonium ion is the reactive intermediate that is formed in the reaction of an alkene with br2 and water. the correct answer is option(d).

A reactive intermediate is a highly reactive, high-energy, brief-lived molecule that, when produced in a chemical reaction, will swiftly transform into a stable molecule. They may occasionally be divided and stored. For instance, low temperatures and Matrix Isolation. Carbocations, carbanions, free radicals, carbenes, nitrenes, and benzyne are six different categories of reaction intermediates. These intermediaries are frequently produced when a chemical substance is chemically broken down.

Reactive intermediates can be used to explain the process of a chemical reaction. Reactive intermediates are high-energy, stable products that are present only in one of the intermediate phases of most chemical reactions, which typically involve more than one elementary step.

The complete question is:

What type of reactive intermediate is formed in the reaction of an alkene with Br2 and water to give a bromohydrin?

a.carbocation

b.carbanion

c.radical

d.cyclic bromonium ion

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In state n = 1, the energy of the hydrogen atom is -13. 58 ev, then the energy in state n = 2 is -3.40eV.

For an electron located in an inner orbit to jump an upper orbit, it needs an energy equal to the difference between the two quantized orbits. This energy comes from the absorption of a photon with the same energy required. The formula for the energy levels of a Hydrogen atom is:

En = E/(n×n)

where E is the energy of the ground state and n is the energy level or state. Then the energy in n= 1 is

En = -13. 58/ 4

En = -3. 40eV

Thus, we find the value of energy of hydrogen atom in n=2 is -3. 40eV.

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The type of bond will typically form between boron and hydrogen based  is boron-hydrogen-boron bridge bond also known as 3 centered two electron bond on the basis of their electronegativity.

Electronegativity is a tendency or chances of an element to accepts the single electron from any atom not only the lone pair of electrons.

Fluorine is smallest and the highly  electronegative element of the periodic table after that oxygen is also an electronegative element after that nitrogen.

Therefore, it is  known as 3 centered two electron bond on the basis of their electronegativity.

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The radius of a sodium atom is determined as 2.145 x 10⁻⁸ cm.

Body-centered cubic (BCC) is the name given to a type of atom arrangement found in nature.

A body-centered cubic unit cell structure consists of atoms arranged in a cube where each corner of the cube shares an atom and with one atom positioned at the center.

The volume of the sodium atom is calculated as follows;

V = ZM/Nρ

where;

V = (2 x 23) / (6.023 x 10²³ x 0.968)

V = 7.89 x 10⁻²³ cm³

a = (V)^¹/₃

a = (7.89 x 10⁻²³ cm³)^¹/₃

a = 4.29 x 10⁻⁸ cm

r = a/2

r = ( 4.29 x 10⁻⁸ cm) / 2

r = 2.145 x 10⁻⁸ cm

Thus, the radius of a sodium atom is determined as 2.145 x 10⁻⁸ cm.

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