Acellus Chem HELP Question in picturee I WILL GIVE BRAINLIEST

Answer:

Explanation:

(a) C5H5N(aq)+H2O(l)⇌C5H5NH+(aq)+OH−(aq)

All isotopes of Oxygen must have  8 protons, but the nucleus might contain 8, 9, or 10 neutrons.

Isotopes are elements that are twins but not identical. Reporting from Chemical LibreTexts, isotopes have the same atomic number, but have different mass numbers. The isotope name comes from the Greek "isos" which means the same and "topos" which means place. So, isotopes are elements with the same atomic number and also occupy the same place in the periodic table, but different mass numbers. Every element in the periodic table has at least one or more isotopes. Like the element hydrogen which has three isotopes namely protium, deuterium, and tritium.

The three hydrogen isotopes have one electron and one proton, so they have the same atomic number. Protium has no neutrons, deuterium has 1 neutron, while tritium has 2 neutrons. It is this difference in neutrons that makes the mass numbers of the three isotopes different.

An isotope is said to be stable if it does not show a tendency to change spontaneously without a trigger. The stability of isotopes varies depending on the number of neutrons and protons. The ratio or comparison of the number of neutrons and protons in the atomic nucleus affects the stability of an isotope. The same number of neutrons and protons or a 1:1 ratio indicates that the isotope is stable.

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The number of moles of agl needed to react with 85.0 g na2s is 1.09. Given that, the reaction is 2AgI + Na₂S → Ag₂S + 2NaI.

From the equation, we can see that for every 1 mole of Na₂S that reacts, 2 moles of AgI are needed. Therefore, we can use the following formula to find the number of moles of AgI needed:

moles of AgI = moles of Na₂S * (moles of AgI / moles of Na₂S)

We can find the moles of Na₂S by using the molar mass, which is the mass of one mole of a substance. The molar mass of Na₂S is:

Molar mass of Na₂S = 2(22.98977 g/mol) + 32.066 g/mol = 78.107 g/mol

Now we can substitute the known information into the formula and solve for the number of moles of AgI:

moles of AgI = (85 g of Na₂S) / (78.107 g/mol) * (2 moles AgI/1 mole Na₂S)

The number of moles of AgI is approximately: 1.09

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In the reaction : 2AgI  +   Na₂S    ----->   Ag₂S   +   2NaI, the number of the moles needed to react with the 85 g of Na₂S  is 2.16 mol.

The reaction is given as :

2AgI  +   Na₂S    ----->   Ag₂S   +   2NaI

The mass of the Na₂S  = 85 g

The molar mass of the Na₂S  = 78 g / mol

The number of the moles = mass / molar mass

                                           = 85 / 78

                                            = 1.08 mol

2 moles of the AgI react with the 1 mole of the Na₂S

moles of the AgI = 2 × 1.08

                            = 2.16 mol

Thus, the moles of the AgI is 2.16 mol.

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The amount of energy transferred by the TV in 1.5 seconds, given the power rating of 180 watts is 270 Joules

We know that power is defined as the rate at which energy is used up. Mathemaically, it can be expressed as:

Power = Energy / Time

With the above formula, we can determine the amount of energy transferred by the TV in 1.5 seconds. This is illustrated below:

Power = Energy / Time

180 watts = Energy transferred / 1.5 seconds

Cross multiply

Energy transferred = 180 watts × 1.5 seconds

Energy transferred = 270 Joules

Thus, we can conclude that the energy transferred by the TV is 270 Joules

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pKa = 14 - pKb

pKa = (14 - 3.25) = 10.75

pH = pKa + log(remaining base/added acid)

--> base and acid in moles

.15 M x .02 L = .003 moles Et; .005 M x .0981 = 4.905 x 10^-4 moles HCl; .003 - 4.905 x 10^-4 = .0025095 remaining moles of Et

pH = 10.75 + (log(((.0025095 moles Et) / (4.095 x 10^-4 moles HCl))) =

pH = 10.75 + .70895 = 11.46 pH units

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The heat of formation of toluene is -103.6 kJ/mol. The heat of formation of a given compound is the energy released or absorbed when one mole of a given compound is formed from its elements in their most stable form. The energy released or absorbed is the heat of formation.

The heat of combustion of a given compound is defined as the energy released when one mole of a given compound is completely oxidized to form its products. The energy released is the heat of combustion.

The heat of formation of a given compound is the energy released or absorbed when one mole of a given compound is formed from its elements in their most stable form. The energy released or absorbed is the heat of formation.

The heat of formation of toluene is -103.6 kJ/mol.

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Answer:8.6mol

Explanation:

number of molecules=5.21*10 power24

Na=6.022*10power 23

since, number of molecules=avagadro number*number of moles

therefore,

number of moles=number of molecules/Avagadro number

n=8.6mol

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The amount of grams of lithium hydroxide needed to completely neutralize 500 ml of a 0.2 m solution of HCl is 38.7 grams.

Lithium hydroxide is an inorganic compound that has the chemical formula LiOH, meaning it contains one atom of lithium and one atom of oxygen connected by a single covalent bond. Lithium hydroxide is commonly used in the chemical industry to produce lithium salts and other compounds, as well as in the manufacturing of glass and ceramics. It is also used in a variety of industrial and medical applications, such as the production of pharmaceuticals and antacids. Lithium hydroxide is an effective absorbent of carbon dioxide and is often used in air purification systems and spacecraft life-support systems.

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The chemical compound C,H,O completely burns in oxygen gas, releasing carbon dioxide and water vapour. In the balanced equation of the combustion (burning) reaction, the oxygen coefficient is 5.

Natural gas is a hydrocarbon that contains methane (CH4). Any hydrocarbon will create water and carbon dioxide when burned in the presence of air (CO2) Complete combustion occurs when natural gas burns, producing a high-temperature blue flame.

When animals breathe or decay (decompose), carbonate rocks are worn, forest fires happen, and volcanoes erupt, carbon dioxide is naturally released into the atmosphere. Human activities such as the combustion of fossil fuels, the destruction of forests, and the manufacture of cement all contribute to the atmospheric addition of carbon dioxide.

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The artificial sweetener's empirical formula and the molecular formula are C₁₄H₁₈N₂O₅. Therefore, option C is correct.

An empirical formula is a chemical formula for a compound that provides the proportions (ratios) of the elements present but not the exact number or arrangement of atoms.

The empirical formula of an artificial sweetener is given as C₁₄H₁₈N₂O₅ and the molecular mass as 294.34 g/mol.

The molecular formula is written as n×(Empirical formula) where n=(molecular mass)÷ (Empirical mass).

First, find the empirical mass,

[tex]\begin{aligned}\mathrm{Empirical\;mass\;of\;C_{14}H_{18}N_2O_5}& = 12\times14+1\times18+14\times2+16\times5\\&=\mathrm{294\;g/mol}\end{aligned}[/tex]

Then, we get the n value as follows,

n= 294.34 g/mol÷ 294g/mol

n=1

Then, the molecular formula is, 1×C₁₄H₁₈N₂O₅.

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Answer:

C

Explanation:

edge 2023

Answer:

The movement of protons through ATP synthase occurs from the intermembrane space to the matrix.

Explanation:

The inner membrane of mitochondria and chloroplasts contains an enzyme called ATP synthase, which uses the energy released by the movement of protons across the membrane to generate ATP. The movement of protons is driven by the proton gradient across the inner membrane, which is created by the electron transport chain. The electron transport chain pumps protons, and then protons flow back down their concentration gradient through the ATP synthase enzyme, which in turn causes the formation of ATP. This process is known as chemiosmosis. The movement of protons through the ATP synthase is an exothermic process, meaning that it releases energy. This energy is used to drive the endothermic process of ATP synthesis, which requires the input of energy to generate ATP.

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Therefore, CH3CH2CH2CH3 is a nonpolar molecular compound and the only intermolecular forces are induced dipole forces.

Having a polar Br-F link, BrF is a polar covalent molecule. As a result, interparticle forces like the dispersion force and dipole-dipole force exist in BrF. The dipole-dipole force is known to be more powerful than the dispersion force.

Due to CH3CF3's polar nature, two of its molecules will interact via dipole-dipole interactions. Because dispersion forces exist between every molecule, they will also be present. The C-H bonds in CH3CH2CH3 have a relatively modest dipole moment and weak dipole-dipole forces because carbon and hydrogen have very similar electronegativities. London dispersion forces are the only intermolecular interactions present in CH4 (methane).

The two most significant intermolecular forces are dipole-dipole interactions and London dispersion forces. 

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Nitrogen––three bonds, one lone pair; trigonal pyramidal. carbon (CH2)—four bonds, no lone pairs; tetrahedral.

A Lewis structure is a diagram that shows how electrons are distributed around atoms. To forecast the quantity and type of bonds that might form around an atom, Lewis structures must be drawn. The geometry of a molecule can also be predicted using a Lewis structure.

The models frequently baffle chemistry students, but if the right measures are taken, drawing Lewis structures can be a simple task. Be aware that there are various methods for building Lewis constructions. These guidelines describe how to draw Lewis structures for compounds using the Kelter method.

Step 1: Find the Total Number of Valence Electrons. ...

Step 2: Find the Number of Electrons Needed to Make the Atoms "Happy"

Step 4: Choose a Central Atom. ...

Step 5: Draw a Skeletal Structure. ...

Step 6: Place Electrons Around Outside Atoms. ...

Step 7: Place Remaining Electrons Around the Central Atom.

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The number of moles that are in 2.39 x 10²⁴ particles of NaCl is 3.97 moles.

One mole of every substance contains the Avogadro number of particles.

The number of particles in a mole of a substance is equal to 6.02 * 10²³ particles of that substance.

Hence, the relationship between the number of particles and the moles of a substance is given by the formula below:

The number of moles of a substance = number of particles / 6.02 * 10²³

The number of moles that are in 2.39 x 10²⁴ particles of NaCl will be:

The number of moles of NaCl =  2.39 x 10²⁴  / 6.02 * 10²³

The number of moles of NaCl =  3.97 moles

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Sodium carbonate (washing soda) can be added to hard water to aid in cleaning because it helps to reduce the hardness of the water.

By reducing the hardness of the water, the detergent used in cleaning is able to work more effectively, resulting in cleaner dishes and surfaces. Sodium carbonate also helps to break down dirt and grease, making it easier to remove. Additionally, it helps to reduce spotting on dishes and glassware.

Sodium carbonate (washing soda) can be added to hard water to aid in cleaning by reducing its hardness, breaking down dirt and grease, and helping to reduce spotting on dishes and glassware.

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Answer:

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

Explanation:

I hope it's useful for you.

Thank you..

Answer:

Explanation:  For example :

Chemical change; rusting of iron, burning wood etc.

Physical change; melting of ice.

According to mole concept and stoichiometry,  1.39 g of hydrogen in the presence of nitrogen  will form 0.46 moles.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the given example, as per the reaction of formation of ammonia 6 g hydrogen produces 34 g ammonia, therefore 1.39 of hydrogen will produce 1.39×34/6=7.87 g of ammonia

7.87 g of ammonia =7.87/17=0.46 moles of ammonia.

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Answer:

A compound consists of two or more different elements chemically combined.

An element is made entirely from one type of atom.

For example, the top left is stated as a compound because it contains two dark atoms and one grey atom, which are both different elements chemically combined, which means it is not an element.

The bottom left is an element because it consists of two dark atoms which are the same. It is made up of one type of atom - a dark atom. Thus it cannot be a compound.

4-bromo-2-ethyl-1-pentene is the IUPAC name of CH-CH-CH-C CH,-CH CH2 compound.

You must first know a few fundamental names before you can name chemical substances. These names are mentioned in the section on alkane naming. The base portion of the name often corresponds to the number of carbons in the parent chain that you have designated. The type(s) of functional group(s) existing on (or inside) the parent chain are indicated by the name's suffix. Substituents are other groups that are connected to the parent chain. Find and identify the carbon chain with the longest continuous length. The groups that make up this chain are named and identified. Sequentially number the chain, starting at the end nearest to a substituent group. Assign a name and corresponding number to each substituent group to denote its location.

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Option (a) is correct. Addition of br2 to (E)- Hex- 3-ene produces a meso dibromide.

The addition of Br of an alkene involves the formation of an intermediate cyclic bromonium ion, followed by the anti-addition of a bromide ion to form the product. The rigidity of the ring controls the stereochemistry of the reaction. This means that the addition of Br of a trans alkene gives a meso dibromide.  the addition of hex-3-ene gives meso-2,3-dibromohexane as the product. Addition of Br2 to (E)-hex-3-ene produces a meso dibromide, a mixture of enantiomeric dibromides which is optically active and a mixture of enantiomeric dibromides which is optically inactive.

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The balanced chemical equation for the reaction of ammonia with water to form the ammonium ion and hydroxide ion is: NH3 (aq) + H2O (l) → NH4+ (aq) + OH- (aq)

In this equation, NH3 represents ammonia in an aqueous solution, H2O represents water, NH4+ represents the ammonium ion, and OH- represents the hydroxide ion. The state symbols (aq) represent aqueous solutions, (l) represents liquid. This process is called ammonium hydroxide and this reaction is an equilibrium reaction and the position of equilibrium is towards the right side, that's why it's considered as a weak electrolyte. The reaction is exothermic, and the NH3 molecule is the Bronsted-Lowry acid and the H2O molecule is a Bronsted-Lowry base, this reaction is an acid-base reaction.

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The exotoxin that functions by destroying cell membranes is called a cytolytic toxin.

A poison produced by bacteria is known as an exotoxin.An exotoxin can harm the host by killing cells or interfering with regular cellular metabolism. They have a great deal of power and can seriously harm the host.The term "cytolysin" refers to a chemical that is released by bacteria, plants, or animals and is especially harmful to individual cells, frequently leading to the lysis of those cells. Cytolysins are called for the cells in which they function specifically. For instance, hemolysins are the cytolysins that break down red blood cells to release hemoglobins, among other things. Cytolysins may have a role in both venoms and immunity.

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Esters and amides are most easily made by Nucleophilic acyl substitution reaction on Alcohols.

The reaction that involves in the bond formation of acyl group is called Nucleophilic substitution reaction. The Nucleophilic acyl substitution reaction is a reaction where a nucleophile forms a new bond with the carbonyl carbon of an acyl group with accompanying breakage of a bond between the carbonyl carbon and a leaving group. This reaction is called as a substitution reaction because the forming and breaking a bond on the same carbon occurs. The functional groups which undergo nucleophilic acyl substitutions are called carboxylic acid derivatives. these include carboxylic acids themselves carboxylates, amides, esters, thioesters, and acyl phosphates. Esters and amides are made by nucleophilic acyl substitution reaction.

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rate constant = 2.63*10-3 L/mol.s

1. The reactions are:

2A  ->  A2              (slow)

A2  +  B  ->  A2B   (fast)

By adding both these equations, we get,

2A + B -----> A2B

This is the overall reaction.

2) In the two step mechanism, the rate depends on the slow step. So,

rate = k [A]2

3) In the two reactions rate will depend on slow step.

Rate = k*[B]*[C]

4) Arrhenius equation,

k = Ae-Ea/RT

A = 4.36×1011M⋅s−1

Ea = 93.1kJ/mol  = 93100 J/mol

R = gas constant = 8.314 J/mol.K

Temperature = T = 342 K

k = Ae-Ea/RT = (4.36×1011) e-93100/(8.314*342) = 2.63*10-3 L/mol.s

rate constant = 2.63*10-3 L/mol.s

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The rate constant of the reaction can be obtained as  0.11 s-1. Option C

We know that the rate constant that we have for the reaction would have to do with the speed with which there is the conversion of the reactants into the products as well as the disappearance of the reactants.

We can see that the table that shows how the reaction is progressing can be shown in the reaction that we have here and we need to show that the information that we have can be used to obtain the rate constant of the reaction as have been shown in the kinetics.

Using the formula;

ln[A] = ln[A]o - kt

[A] = concentration at time t

[A]o = initial concentration

k = rate constant

t = time taken

We have;

–1.735 = – 1.625 - k(1)

k = – 1.625 + 1.735

k = 0.11 s-1

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A metal in chemistry refers to a group of elements that have common characteristics, such as being good conductors of heat and electricity, being malleable and ductile, and having a metallic luster.

Some examples of metals include:

The purpose of these metals depends on their physical and chemical properties as well as the specific use for which they are made. 

The answer is general since this question is incomplete and the similar one is nowhere to be found. 

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Answer:

Can(HCO 3)2=CaCO +CO2 +H2O

At the end of the reaction before adding aqueous [tex]NaHCO_3[/tex], the following chemical species are likely to be present:

A Lewis structure, also known as a Lewis dot diagram, is a way to represent the chemical bonding in a molecule. It uses dots (also called electron dots or Lewis dots) to show the valence electrons on an atom, and lines to show the bonds between atoms. The goal of drawing a Lewis structure is to use the valence electrons of the atoms in a molecule to form the most stable arrangement of atoms, that is to say, to achieve the octet rule where each atom has 8 valence electrons in its outermost shell.

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Option C - Krebs cycle and oxidative phosphorylation are the processes produces 36 ATP .

The tricarboxylic acid (TCA) cycle, also known as the Krebs or citric acid cycle, is the main source of energy for cells and a crucial step in aerobic respiration. The cycle transforms the chemical energy of acetyl coenzyme A (acetyl CoA) into nicotinamide adenine dinucleotide's reducing force (NADH). The Krebs cycle, also known as the tricarboxylic acid cycle or the citric acid cycle, is the central component of cellular metabolism and is crucial for the production of both energy and biomolecules. In addition to completing the task of reducing sugar that was begun during glycolysis, it also fuels ATP synthesis. Cells use enzymes to oxidise nutrients and release chemical energy in the metabolic process known as oxidative phosphorylation.

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Electrons in the filament of a lamp that carries AC (alternating current) have a net speed of zero because the electrons are constantly reversing direction.

Electrons in the filament of a lamp that carries AC (alternating current) have a net speed of zero because the electrons are constantly reversing direction.

This means that the electrons do not have an overall net velocity or speed, as they are oscillating back and forth in the same area.

This is because the alternating current causes the electrons to oscillate back and forth in a regular pattern, so they do not have an overall net motion. This is why the filament of a lamp that carries AC is able to produce light—the electrons are constantly reversing direction, creating a rapid vibration within the filament that produces heat and light.

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