90cm3 of 1 m hcl solution and 10cm3 of 0.5 m naoh solution are mixed together. the concentration of hcl contained in the final solution

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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There will be 5.625 atm pressure of the gas at 250 K when a gas at  constant volume has a pressure of 4. 50 atm at 200 K

According to gas law at constant volume the pressure of a given gas is directly proportional to the kelvin  temperature .

[tex]P_{1} =T_{1}[/tex]               (i)

[tex]P_{2} = T_{2}[/tex]              (ii)

Where P and T is the pressure and temperature

Divide equation ( i )  by equation ( ii ) we get

[tex]P_{1}/P_{2}[/tex] = [tex]T_{1}/T_{2}[/tex]

Now putting the value of all given data in above final equation then we get.

4. 50 atm/[tex]P_{2}[/tex] = 200K/250K

[tex]P_{2}[/tex] = 4. 50 atm × 250K/ 200K = 5.625 atm

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

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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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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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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Electron configuration is the electron distribution in the molecular and atomic orbital. An element with configuration ns²np¹ will be in the 3A group. Thus, option B is correct.

The electronic configuration has been the arrangement and distribution of the sub-atomic particle, an electron in the atomic shells.

The electronic configuration given is, ns²np¹. Here, there are three valence electrons in the outermost orbit. As it has been known that the number of the valence electron gives the number of the group.

Therefore, option B. 3A group or 13 group is the correct option.

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Your question is incomplete, but most probably your full question was, An element with the general electron configuration for its outermost electrons of ns2np1 would be in which group?

a. 2a

b. 3a

c. 4a

d. 5a

e. 8a

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:

It displays the static pressure loss over a length of 100 feet for a specific duct size and airflow.

People who work in the HVAC and construction industries use ductulators to size the ductwork in mechanical systems. It enables you to select the volumetric flow rate after selecting the static pressure you wish to keep in the duct. The ductulator offers you a wide range of rectangular duct diameters that will create this when you enter those criteria. It also displays the required diameter for a circular duct. The actual instrument is constructed of sturdy, thick paper, and it contains a rotating piece that lets you select the two settings I previously indicated.

Answer:

Explanation:.

Explanation:

secondary amine bro go leaen

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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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?

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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[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 layer of the earth's atmosphere in which gases do not maintain a uniform composition is the Heterosphere.

Heterosphere is simply the layer of an atmosphere in which the gases are split out according to molecular diffusion with an increase in altitude. Therefore, lighter species become more abundant than heavier species.The main components of the heterosphere are oxygen, helium, nitrogen, and hydrogen.

The lower layer is composed of nitrogen and oxygen.In the lower layers of the heterosphere, heavy molecules & atoms are present but lighter ones are present in the upper layer. According to Solar and temperature activities, the boundary between the molecules ranges. The heterosphere lies above the homosphere.

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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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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 equilibrium expression is:

H2S (aq) + H2O (l) ⇋ H3O (aq) + HS (aq)

In order to calculate the pH of equation having aqueous solution of weak acid H2S, let’s assume that molar concentration of the products H3O and HS total released is ‘a’. Now as per given information concentration of weak acid H2S is 2.3 M. Thereby,

Ka = [H3O+] [HS] / [H2S]

1.19 x 10-7 = [a] * [a] / [2.3]

a2 = 1.19 x 10-7 x 2.3

a = 5.24 x 10-4

As per the calculation, the total concentration of the products released (HS) and (H3O) will be 5.24 x 10-4, on that basis, the pH of the weak acid (H2S) can be calculated as follows:

-log (0.000522494) = 3.28

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9ml will be given for the case of dosage calculation order: 3 mg available: 2 mg per 6 ml

Conversion factors are necessary for dosage calculation, such as when translating from pounds to kilograms or liters to milliliters. This approach, which is straightforward in design, enables physicians to deal with different units of measurement and convert factors to arrive at the solution.

dosage calculation techniques serve as a second or third check on the accuracy of the previous computation techniques. Dimensional Analysis, Ratio Proportion, and Formula or Desired Over Have Method are the three main approaches for dosage calculation. dosage calculations are frequently prescribed and labeled based on their weight or, for solutions, their strength, which is the amount of weight dissolved or suspended in a given volume.

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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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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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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]

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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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.

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.

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

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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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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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 discreteness of energy levels is best understood by considering the electrons to be wave like.

This above can be explained on the basis of bohr model and wave mechanical theory.

According to bohr's atomic model, the angular momentum of electron orbiting around the nucleus is an integral multiple of h/2π.

The electron in the atom moving around the nucleus of an atom. The wave mechanical theory proposes that each electron revolving an atom's nucleus occupies a specific orbital and spins in a certain direction, but the orbitals is like a wave of energy.

The wave mechanical model proposed that the electron acts like particles as well as wave of energy. According to the field around, the electron changes there path and they start moving very fast act like wave of energy and hence they are not in place during any particular time.

Thus we concluded that electron revolve around central nucleus at such high speed that they act like wave of energy.

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