For the lead storage battery, the chemical reaction is: pb pbo2 2 h2so4 2 pbso4 2 h2o the pb in this voltaic cell acts as:_______

Selective serotonin reuptake inhibitors (SSRIs) are drugs that are antidepressants. These blocks the reuptake of a neurotransmitter leading to increases in their activity in the synaptic cells.

Neurotransmitters are defined as the signaling molecules that are secreted by the nerve cells and act as signal transporter between the neurons and the other cells of the body.

The SSRIs class of drugs affects this neurotransmitter and blocks the pathway to the presynaptic cell. This, in turn, affects synaptic communication by increasing the amount of those SSRIs in the body and acting as a stimulant to treat various diseases.

Therefore, the SSRIs block the neurotransmitter and result in their effects.

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Because it requires more energy to create a neutron from a proton than it does to create a proton from a neutron, protons were formed more frequently than neutrons in the early universe. The correct answer is option b.

To find the answer, we need to know more about the early universe.

Thus, we can conclude that, the correct answer is option b.

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When an electron in a hydrogen atom jumps from an orbital farther from the nucleus to an orbital closer to the nucleus, the energy is emitted.

The energy of electron decreases. When it goes, the electron release a photon of electromagnetic energy.

When an electron jumps from higher energy orbital to lower energy orbital, the difference in the energies of these two orbitals is radiated as quantum.

E = hc/wavelength

The photon is emitted with the electron moving from higher energy level to lower energy level.

The wavelength of emitted radiation would be (27/32) × wavelength.

Thus we concluded that the energy of photon is exact energy that is lost by the electron moving to its lower energy level.

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True

The bare minimum required standard

The minimal necessary standard restricts uses, disclosures, and requests for PHI to the bare minimum amount required to fulfil the use's or disclosure's intended purposes.

Under the Privacy Rule's Minimum Necessary Standard, covered entities are required to take all necessary precautions to ensure that protected health information (PHI) is only accessed as much as is required to carry out the duties at hand.

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The moles of hydrogen in the talc sample are 5.67 moles.

Talc are the hydrous silicate minerals. The chemical formula of talc is Mg₃Si₄O₁₀(OH)₂.

From the formula it can be determined that there are: 3 moles of Mg, 4 moles of Si, 12 moles of O and 2 moles of H.

Moles are a type of SI unit of measurement of the amount of substance.

According to the question, magnesium = 8.5 moles

Also, 3 moles of Mg = 2 moles of H

Therefore, moles of H = 8.5 moles × (2 moles H / 3 moles Mg)

                 moles of H = 5.67 moles

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The trend will be such that the time taken for the cross to disappear will be increasing.

The rate of reactions is affected by the concentration of reactants. The more concentrated the reactants are, the more the rate of the reaction, and vice versa. This is based on the condition that all other factors are kept constant.

In the illustrated reaction, the volume of sodium thiosulfate decreases downward while the volume of water increases. This means that the sodium thiosulfate gets more diluted as we move downward.

Thus, the reaction rate will keep decreasing. In other words, more time would be needed for the cross to disappear as the concentration of sodium thiosulfate decreases.

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Hello its me Sanya yadav

1. The empirical formula of the compound is Ti₂O₃

2. The correct answer to the question is: smallest whole-number ratio of the atoms (Option C)

3. The correct answer to the question is: orange-brown (Option A)

4. The empirical formula of the compound is KClO₂

5. The empirical formula of the compound is P₂O₅

Divide by their molar mass

Ti = 66.6 / 48 = 1.3875

O = 33.4 / 16 = 2.0875

Divide by the smallest

Ti = 1.3875 / 1.3875 = 1

O = 2.0875 / 1.3875 = 3/2

Multiply by 2 to express in whole number

Ti = 1 × 2 = 2

O = 3/2 × 2 = 3

Thus, the empirical formula of the compound is Ti₂O₃

This is the simplest formula of a compound which shows the smallest whole number ratio of the atoms present in the compound

With the above definition, we can conclude that the correct answer to the question is: smallest whole-number ratio of the atoms (Option C)

In the tin oxide laboratory activity, the colour of the vapor emitted when nitric acid is added to the tin is: orange-brown

NOTE: This colour is visible when we carryout the practical experiment

Thus, the correct answer to the question is orange-brown (Option A)

Divide by their molar mass

K = 36.6 / 39 = 0.9385

Cl = 33.2 / 35.5 = 0.907

O = 29.9 / 16 = 1.8688

Divide by the smallest

K = 0.9385 / 0.907 = 1

Cl = 0.907 / 0.907 = 1

O = 1.8688 / 0.907 = 2

Thus, the empirical formula of the compound is KClO₂

Divide by their molar mass

P = 43.6 / 31 = 1.406

O = 56.4 / 16 = 3.525

Divide by the smallest

P = 1.406 / 1.406 = 1

O = 3.525 / 1.406 = 5/2

Multiply by 2 to express in whole number

P = 1 × 2 = 2

O = 5/2 × 2 = 5

Thus, the empirical formula of the compound is P₂O₅

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The mole fraction of ethylene glycol is 0.203.

The mole fraction represents the number of moles of a specific component divided by the total number of moles present in the given solution.

It is a method of expressing the concentration of a solution

Mole fraction can be represented by x. Let a solution consists of components A and B then, the mole fraction is

[tex]Mole fraction of solute, n_A = \frac{n_A}{n_A+n_B}[/tex]

[tex]Mole fraction of solvent, n_B = \frac{n_A}{n_A+n_B}[/tex]

The molar mass of ethylene glycol = 62 g

Given the mass of ethylene glycol = 2.109 x 10³ g

The molar mass of water = 18 g

Given the mass of water= 2.40×10³ g

No moles of ethylene glycol,  [tex]n_A[/tex] = [tex]\frac{2.109 \times 10^3 g}{62 g}[/tex]

                                                =34.02

No of moles of water, [tex]n_B[/tex] = [tex]\frac{2.40 \times 10^3 g}{18 g}[/tex] = 133.33

Mole fraction of ethylene glycol = [tex]x = \frac{n_A}{n_A +n_B}[/tex]  = [tex]\frac{34.02}{34.02+133.33} = \frac{34.02}{167.35}[/tex]

                                                      =  0.203

Hence, The mole fraction of ethylene glycol is 0.203

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Answer: The process is diffusion.

Explanation:

a dark liquid will have the highest concentration of dark purple atoms/molecules so it gives a concentrated colour.

when water is added to it, the colourless water molecules fill up the gaps between the purple particles and so their colour fades and becomes lighter and lighter as we add more water. see the image attached where imagine the red particles are water and the blue particles are purple particles. thats why the colour fades.

In aqueous solutions, the hydrogen ion, also known as the hydronium ion, is a Bronsted-Lowry acid, while the hydroxide ion is a base as a result of the self-dissociation reaction.

        [tex]C_4H_5N(aq) + H_2O(l)[/tex] ⇄ [tex]C_4H_5NH (aq) + OH^-(aq)[/tex]

        [tex]Bronsted-\\Lowry Acid[/tex]                    [tex]Conjugate Acid[/tex]

Any species that may transfer a proton (H+) to another molecule is a Brnsted-Lowry acid. Any species that can take a proton from another molecule is a Brnsted-Lowry base. In essence, a Brnsted-Lowry base is a proton acceptor (PA) and an acid is a proton donor (PD).

According to the Arrhenius theory, acids are defined as chemicals that dissociate in an aqueous solution to produce hydrogen ions (H+), whereas bases are defined as substances that produce OH (hydroxide ions).

The hydrogen ion, or hydronium ion, is a Brønsted–Lowry acid in aqueous solutions, and the hydroxide ion is a base, by virtue of the self-dissociation reaction.

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The chlorine molecules, cl2, would behave if mixed with water is best described by the polarity concept.

Polarity is a phenomena by which the dissolving power of any molecule can be known if they are polar will completely dissociate in water and if non polar will partially dissociate in water

Here chlorine is very poorly dissolve in water due to its non polar nature and water is polar. Some compounds are polar for short time of period and attend a partially positive and a partially negative charge within them.

Therefore,  Cl2 is a non polar compound describes the polarity.

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Here BA is benzoic acid and B- is conjugate base;

BA is weaker than B- because the Ka < Kb

--> BA is stronger than B- because the Ka > Kb

BA is stronger than B- because the Ka < Kb

BA is weaker than B- because the Ka > Kb

A conjugate acid-base pair, according to the Brnsted-Lowry definition of acids and bases, consists of two substances that are distinct only in that they contain a proton (H+). When a proton is supplied to a base, a conjugate acid is created, and vice versa when a proton is taken away from an acid, a conjugate base is created. Yuki Jung was the creator.

The power of an acid (or base) is inversely proportional to the power of its conjugate base (or conjugate acid): The conjugate base of an acid is weaker the stronger it is. The conjugate base of a weaker acid has a stronger base. A pair of chemical species known as conjugate acid and conjugate base exhibit opposing chemical behaviors.

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Answer:

  3.0×10⁻¹³ M

Explanation:

The solubility product Ksp is the product of the concentrations of the ions involved. This relation can be used to find the solubility of interest.

The power of each concentration in the equation for Ksp is the coefficient of the species in the balanced equation.

  Ksp = [Al₃⁺³]×[OH⁻]³

The initial concentration [OH⁻] is that in water, 10⁻⁷ M. The reaction equation tells us there are 3 OH ions for each Al₃ ion. If x is the concentration [Al₃⁺³], then the reaction increases the concentration [OH⁻] by 3x.

This means the solubility product equation is ...

  Ksp = x(10⁻⁷ +3x)³

For the given Ksp = 3×10⁻³⁴, we can estimate the value of x will be less than 10⁻⁸. This means the sum will be dominated by the 10⁻⁷ term, and we can figure x from ...

  3.0×10⁻³⁴ = x(10⁻⁷)³

Then x = [Al₃⁺³] will be ...

  [tex][\text{Al}_3^{\,+3}]=\dfrac{3.0\times10^{-34}}{10^{-21}}\approx \boxed{3.0\times10^{-13}\qquad\text{moles per liter}}[/tex]

We note this value is significantly less than 10⁻⁷, so our assumption that it could be neglected in the original Ksp equation is substantiated.

__

Additional comment

The attachment shows the solution of the 4th-degree Ksp equation in x. The only positive real root (on the bottom line) rounds to 3.0×10^-13.

Equilibrium constant for the reaction is

[tex]\sf K_{sp}=[Al^{3+}][OH^-]^3[/tex]

So

[tex]\\ \rm\Rrightarrow s=\dfrac{3.0\times 10^{-34}}{(10^{-7})^3}[/tex[

[tex]\\ \rm\Rrightarrow s=\dfrac{3.0\times 10^{-34}}{10^{-21}}[/tex]

[tex]\\ \rm\Rrightarrow s=3.0\times 10^{-13}M[/tex]

There is a total of three atoms present in the water (H₂O) molecule.

An atom is the smallest particle of an element that may or may not be capable of independent existence.

A molecule is the smallest particle of an element or compound that can exist freely.

Subscripts are the numbers that come below after a symbol. They tell you the number of atoms of an element. If there is no subscript then it is understood that the subscript is 1.

For calculating the number of atoms in a molecule, add the subscripts of that molecule, and you will get the total atoms of it.

For example, in molecule C₂H₅O, there are 2 carbon atoms, 5 hydrogen atoms, and 1 oxygen atom.

Add the subscripts

2 + 5 + 1 = 8

Hence, there is a total of 8 atoms in C₂H₅O.

For the H₂O molecule,

2 + 1 = 3

Hence, there is a total of 3 atoms present in one water molecule.

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The concentration of [ Hy³] = 4.861 *28⁻²³

The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or answer. A focused answer is one which has a exceedingly massive quantity of dissolved solute. A dilute answer is one that has a tremendously small amount of dissolved solute.

Given,

 Molarity of VoSo4 ,M = 0.02M

     Vol of VoSo4 , V = 10 ml

Molarity of EDTA = 0.02 M

vol of EDTA = 9.10 ml = 0.0091 L

& 10 ml of buffer with pH =4

NOW,

     no. of moles of EDTA = molarity * Volume (L)

                                         =  0.02 M * 0.0091 L

                                        = 182 * 10^-6 moles

                                        = 1.82 * 10^-4 moles

Now,

       ∝ Y^3- = [tex]\frac{[Y^3-]}{moles of edta}[/tex]

         [ Y^3-] = ∝ Y^3- * moles of EDTA

Given,

at pH = 4,   ∝ Y^3- = 3*10^-9

    ∴ ∝ Y^3- =  3*10^-9

        [ Y^3-] = 3*10^-9 * 1.82 * 10^-4

                   = 5.46 * 10^-13

Now, K f = [H2Y^2-]/[vo^2+][y3-]

           [vo^2+] = 18.7

[H2Y2-] = K f * [ v o+][Y^2-]

    [H2Y2] = 3.762 * 10^-13

 [ HY^3-] = 4.8 * 10^-23

So, the concentration of the    [ HY^3-] is 4.8 * 10^-23

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Molar concentration of Sodium chloride (NaCl) means the number of moles of sodium chloride present in 1L of water.

Molar mass of NaCl = Molar mass of Na + Molar mass of Cl

Molar mass of NaCl = 23 + 35.5

Molar mass of NaCl = 58.5g

∴ 1L of water contains 55.55 moles of water. Hence,

Mass of ocean water = 55.55 × 18 = 999.9g

Since, 1L of ocean water has a mass of 999.9g of which 3.5% is the salt.

hence, (999.9) (0.035) = 34.99g

So, No. of moles of NaCl = Mass of NaCl / 58g NaCl per mol

No. of moles of NaCl = 34.99/58.5

No. of moles of NaCl = 0.59 moles

So, Molar concentration or Molarity would be 0.59 moles present in 1L of solution.

Hence, Molarity or Molar Concentration = Moles of NaCl/ Volume of solution (in L)

Molarity = 0.59/1L

⇒ Molarity = 0.59M

Hence, the molarity is 0.59M

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99 140-10-3.

99 140-10-3 is the compound number for trans-cinnamic acid.

Phenolacrylic acid

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The number of atps generated is 330 ATP

At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up the structure of ATP, which is a nucleoside triphosphate.

Glycerol provided us with 2 ATP and 2 NADH. In b-oxidation, we obtained 8 NADH and 8 FADH from each fatty acid, but since there were 3 fatty acids, we also produced 24 NADH and 24 FADH. We used 24 acetyl-CoA molecules, which were converted into 24 ATP, 24 FADH, and 72 NADH molecules by the citric acid cycle. You should obtain the same figures after adding everything up.

80 NADH x 3 ATP/NADH = 240 ATP

32 FADH x 2 ATP/FADH = 64 ATP

102 + 64 + 26 ATP = 330 ATP.

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Question:

If butane had a volume of 500 ml. at a pressure of 1.5 atm and a temperature of 20 °C, what would the new volume of the gas be at a temperature of 30 °C and a pressure of 500 Torr?

Solution Given:

Let P be the pressure V be volume and and T be temperature.

Volume of Butane [[tex]V_1[/tex]] = 500 ml

Pressure of Butane [[tex]P_1[/tex]] = 1.5 atm

Temperature [[tex]T_1[/tex]] =20°C=20+273=293K

New Volume of Butane [[tex]V_2[/tex]] = ?

New Pressure of Butane [[tex]V_2[/tex]] =500 Torr=500*0.00131579=0.657895 atm

Note: 1 Torr= 0.00131579 atm

New Temperature of Butane [[tex]V_2[/tex]] =30°C=30+273=303K

Now

By using combined gas law equation:

[tex]V_2=V_2*\frac{P_1*T_2}{P_2*T_1}[/tex]

[tex]V_2=500*\frac{1.5*303}{0.657895*293}=1178.9 ml[/tex]

The new volume of Butane is 1178.9 ml

Atomic or hybrid orbital on the central br atom makes up the sigma bond between this br and an outer f atom in bromine trifluoride, brf3 is sp2 hybridization

Trigonal hybridization is another name for sp2 hybridization. It entails combining one's' orbital with two 'p' orbitals of equal energy to create a new hybrid orbital known as sp2. A trigonal symmetry combination of s and p orbitals that is kept at 120

One of the hybrid orbitals formed when one s orbital and two p orbitals are mathematically merged to form three new equivalent orbitals orientated toward the corners of a triangle is sp2 hybridization.

The only feasible molecule geometry for sp2 hybridized center atoms is trigonal planar. When all of the bonds are in place, the shape is trigonal planar as well.

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D.Acute Viral Hepatitis

inflammation of the liver caused by infection with one of the five hepatitis viruses

Hope it helps (≧∇≦)/

The mass of copper releases 112.4 kj of heat as it freezes is 549 gm.

The most typical illustration is when solid ice transforms into liquid water. The molecules within in the substance become less structured as a result of this process, which is also known as melting or heat of fusion.

Calculation for mass of copper;

The heat of fusion for copper is given as 13.0 kj/mol.

Hfus(Cu) = 13.0 kJ/mol

The heat released during the process is  112.4 kj.

Q = 112.4 kJ;

The formula for molar heat of substance is;

Q = n(Cu) · Hfus(Cu).

Where n(Cu) is the number of moles of copper present in the solution.

Write formula in terms of Number of moles.

n(Cu) = Q / Hfus(Cu)

Substitute the given values;

n(Cu) = 112.4 kJ / 13.0 kJ/mol.

n(Cu) = 8.65 mol (number of moles of copper present)

m(Cu) = n(Cu) · M(Cu).

Where, m(Cu) is the mass of copper.

M(Cu) is the molecular mass of the copper.

Substitute the values in the formula to get the mass.

m(Cu) = 8.65 mol × 63.546 g/mol.

m(Cu) = 549.428 g

Therefore, the mass of copper present in the solution was 549.428 g.

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Answer: C.) 549 g

Explanation:

There exist ways in separating mixtures of chloride salts such as that sodium chloride and ammonium chloride. It can be accomplished by crystallization, filtration, or sublimation.

An antacid exists as a substance that neutralizes stomach acidity and stands habituated to relieve heartburn, indigestion, or an upset stomach.

Antacids increase the pH of the stomach contents toward neutrality. An antacid that increases the pH from 1.5 to 3.5 produces a 100-fold decrease in the concentration of gastric acid. Furthermore, the reduction of acidity exists escorted by inhibition of pepsin activity, another essential component of the digestive juice.

There exist ways in separating mixtures of chloride salts such as that sodium chloride and ammonium chloride. It can be accomplished by crystallization, filtration, or sublimation. The easiest approach among the three exists separation by sublimation.

Ammonium chloride sublimes upon heating. The sublimation exists as a decomposition of ammonium chloride forming ammonia and hydrogen chloride.

Sodium chloride on the other hand doesn't sublime and includes a more increased melting point than ammonium chloride. If we want to divide the mixture, we have to heat it to 330-350 degrees Celsius and manage the gas that will be produced.

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When pcl5 solidifies it forms pcl4 cations and pcl6–anions. according to valence bond theory, hybrid orbitals that  are used by phosphorus in the pcl4 cations are one orbital of s and three orbital of p as it is sp³hydridised.

Hybridization is a process or system which specifies the shape and geometry of any element or molecule with bond angles too.

The pcl4 cation is sp³ hybridized because of the phosphorus behave as a central atom here and the 4 chloride molecules are attached with the p- orbitals to the phosphorus molecule.

Therefore, pcl4 cation  is sp³ hybridized.

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Answer:

c )   16

Explanation:

C4 H10 O    +   6 O2  =====>  4  CO2  +   5  H2O

1 + 6 + 4 + 5 = 16

Answer:

C.) 16

Explanation:

An equation is balanced when there are equal amounts of each element on both sides of the reaction. These values can be modified by adding coefficients.

The unbalanced equation:

C₄H₁₀O + O₂ -----> CO₂ + H₂O

Reactants: 4 carbon, 10 hydrogen, 3 oxygen

Products: 1 carbon, 2 hydrogen, 3 oxygen

The balanced equation:

1 C₄H₁₀O +  6 O₂ -----> 4 CO₂ + 5 H₂O

Reactants: 4 carbon, 10 hydrogen, 13 oxygen

Products: 4 carbon, 10 hydrogen, 13 oxygen

Now, you can add the coefficients:

1 + 6 + 4 + 5 = 16

The NMR spectroscopy will be used for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane.

A spectroscopic method for observing the local magnetic fields surrounding atomic nuclei seems to be nuclear magnetic resonance spectroscopy, also referred to as magnetic resonance spectroscopy as well as NMR spectroscopy.

The identification and study of organic molecules benefit greatly from nuclear magnetic resonance (NMR) spectroscopy. This type of spectroscopy has a straightforward underlying theory. Numerous atom types' nuclei behave like small magnets and frequently align themselves in magnetic fields.

Therefore, the NMR spectroscopy will be used for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane.

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Heya....

Here's your answer.....

PV = nRT... R is a constant...

so PV/nT = constant...

P1V1 / n1T1 = P2V2 / n2T2...P is constant.T is constant.. so

V1 / n1 = V2 / n2

since n = mass / mw

V1 / (mass 1 / mw) = V2 / (mass 2 / mw)

and since molecular mass = constant

V1 / mass 1 = V2 / mass 2

mass 2 = V2 x mass 1 / V1 = 2.90L x 2.00 g / 2.00 L = 2.9 g

mass 2 - mass 1 = 2.90 g - 2.00 g = 0.90 g

ie.. 0.90 g of He was added.

Thanks...!!!