What is the answer of number 11?

3[tex]Sr^{2+}[/tex](aq) +    6Cl- (aq) + 6Na+ (aq) +  2PO43-(aq) → Sr3(PO4)2(s)  +   6Na+ (aq) + 6Cl- (aq) is the balanced net ionic equation for the reaction when strontium chloride and sodium phosphate are mixed in aqueous solution.

When the general reaction equation of any reaction is represented by dissociating its ions is know as ionic equation.

Strontium chloride and sodium phosphate are mixed in aqueous solution to react.

To find:

The balanced net ionic equation for the given statement.

So,

first the general reaction equation for the given Statement is given below

3SrCl2 (aq)   + 2Na3PO4(aq) → Sr3(PO4)2(s)    + 6 NaCl(aq)

Now, we dissociate the ions to get the ionic equation for the same given reaction for the statement provided above:

So the net ionic equation for the same is :

3[tex]Sr^{2+}[/tex](aq) +  6Cl- (aq) + 6Na+ (aq) +  2PO43-(aq) → Sr3(PO4)2(s)  + 6Na+ (aq) + 6Cl- (aq)

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Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

What is resonance hybrid?

A resonance hybrid is a substance that exhibits resonance and has a structure that is stated as the average of two or more structural formulas, each of which is separated from the next by a double-headed arrow. For instance, benzene.

It is possible to explain the equal bond lengths using the resonance hybrid of this polyatomic ion, which was created from its various resonance structures.

Therefore, Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

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According to Dalton's Atomic Theory, the individual elements making up the compound has a fixed ratio. This law is known as the Law of Definite Proportions. Obeying this law, the number of hydrogen to oxygen should be a constant, so we can use ratio and proportion.

The ratio can be determined from the molecular formula of methyl tert-butyl ether:  C5H12O. This is the correct molecular formula of the compound. To check, try searching it in the internet. From the molecular formula, we can see that there are 5 carbons in every 12 hydrogens and in every 1 oxygen. So, the hydrogen to oxygen ratio is 12/1. Applying ratio and proprotion,

12/1 = 0.0723 moles of hydrogen/x, where x is the amount of moles oxygen. Solving for x,

x = 0.006025 moles of oxygen

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The pressure when the volume is 1.67 l and the temperature is 305 k 1.604 atm.

Using the ideal gas equation:-

Given;

P₁ = 1.06 atm

V₁ = 2.37 L

T₁ = 286 K

P₂ = ?

V₂ = 1.67

T₂ = 305 K

P₁V₁/T₁ =P₂V₂/T₂

P₂ = P₁V₁T₂ /T₁V₂

   =  1.06 × 2.37 ×  305 /  286 × 1.67

    = 766.221 / 477.62

     = 1.604 atm

What is Pressure?

The physical force exerted on an item is called Pressure. The force applied is vertical to the surface of items per unit area. The basic formula for pressure is Force/Area.

What is an ideal gas?

An ideal gas is an intransigent gas composed of a set of irregularly-moving point atoms that interact only through elastic conflicts.

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Commercial methods for making fatty acid methyl esters (FAMEs). Base-catalyzed transesterification of the oil with Sodium Methoxide.

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The amount of sample of K-42 yesterday at the same time is equal to 136.8 mg.

The half-life of the radioactive material can be described as the time required to decrease its original amount to half after decay. The half-life of a radioactive element does not depend on the initial amount of the substance.

Consider that N₀ is the initial amount of the K-42 sample

Consider that 'n' is the number of half-lives of K-42.

The time for which K-42 decay, t = 24 hrs

Half-life of substance (t½) =  12 hrs

t = n ×t½

24 = n × 12

n = 2

Assume that N₀ is the amount of the K-42 before decay for 24 hours.

N ×2² = N₀

34.2 × 4 = N₀

N₀ = 136.8 mg

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What is Stoichiometry?

Stoichiometry is the relationship between two substances through use of ratios.

To answer these questions, you must use the ratio:

1 mol of a substance      

6.022 × 10²³ molecules

Let's try the first question:

9.25 × 10³⁴ molecules H₂O     ×         1 mol H₂O        

                                                 6.022 × 10²³ molecules

The molecules will cancel out, leaving you with

9.25 × 10³⁴ mol

6.022 × 10²³ mol

Use your calculator to solve:  1.536 × 10¹¹ mol H₂O

Now, follow this same format to solve the rest of the questions:

2) 4.51 × 10¹⁵ molecules Al      ×       1 mol Al      

                                                 6.022 × 10²³ molecules

= 4.51 × 10¹⁵ mol Al

6.022 × 10²³ mol Al

= 7.489 × 10⁻⁹ mol Al

3) 3.78 × 10²⁰ molecules Li    ×         1 mol Li        

                                                 6.022 × 10²³ molecules

0.0006276 mol Li

_________________________________________________________

The molarity of the solution and the number of moles of the solute can be used to calculate the volume of a solution. Blood serum at a concentration of 0.14 M and 2g of NaCl is 0.24 L in volume.

The term "molarity" of a material refers to its concentration. It is the proportion of the solute's moles to the liters of solution. Temperature affects a substance's molarity.

The number of moles of solute and the volume of the solution both affects the molarity of the solution. The blood serum has a molarity of 0.14 and 20g of sodium chloride.

NaCl has a molar mass of 58.5 g/mol. The following formula is used to determine how many moles of NaCl are present in the 2 g sample:

2 g = 58.5 moles in terms of moles.

     = 0.034 moles.

Now, the blood serum volume is determined using the formula below:

Volume is equal to moles times molarity.

= 0.14 mol/L and 0.034 moles

= 0.24 liter.

As a result, 0.24 L of 0.14 M blood serum contains 2 g of NaCl.

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1 mole of potassium hydroxide would react with 1 mole of hydrochloric acid.

The balanced equation for the reaction is as follows:

[tex]KOH + HCl[/tex]→ [tex]KCl + H_{2} O[/tex]

Titration is defined as "the process of determining the quantity of a substance A by adding measured increments of substance B, the titrant, with which it reacts until exact chemical equivalence (the equivalence point) is achieved."

Titration is a common quantitative chemical analysis laboratory method for determining the concentration of an identified analyte. The titrant or titrator is a reagent that is prepared as a standard solution of known concentration and volume.

The titration's goal is to find the equivalence point, or the point at which chemically equivalent amounts of the reactants have been mixed. The amount of reactants mixed at the equivalence point is determined by the stoichiometry of the reaction.

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A chemical compound is created when metals and nonmetals mix in a specific ratio. AlCl3 is the compound that will be created from elements in groups 13 and 17.

A chemical compound is made up of several related molecules (or molecular entities), each of which has atoms from various chemical elements and is joined by chemical bonds. A molecule is not a compound because it is made up of only one element's atoms. A chemical reaction can convert one element into another and may involve interactions with other molecules. In the course of this process, atom-to-atom bonds may form or break.

Using the common chemical symbols with numerical subscripts, a chemical formula defines the number of atoms of each element in a compound molecule. The Chemical Abstracts Service has given a lot of chemical compounds a special CAS number that serves as an identification. More than 350,000 chemical compounds (including chemical combinations) have been registered for manufacturing and use globally.

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A cup of hot coffee initially at 95ºc cools to 80ºc in 5 min while sitting in a room of temperature 21ºc. using just newton’s law of cooling, determine when the temperature of the coffee will be a nice 50ºc

In 10 minutes the hot coffee will attain the temperature of 50 degrees Celsius.

Initially the hot cup of coffee at the temperature of 95 degrees Celsius but after 5 minutes its temperature decreases from 95 to 85 degrees Celsius which is 15 degrees Celsius decrease so in other 5 minutes, the temperature decreases to 65 degrees Celsius.

Again after 5 minutes the temperature will further decrease finally the cup of coffee attain the temperature of 50 degrees Celsius so we can conclude that in 10 minutes the hot coffee will gain the 50 degrees Celsius temperature.

According to Newton's Law of cooling, the charge of loss of heat from a body is immediately proportional to the difference in the temperature of the frame and its surroundings.

The price, wherein a frame that is uncovered, modifications the temperature thru radiation is about proportional to the difference among the item's temperature and its environment, and the furnished difference is low. that is called Newton's law of cooling.

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Compounds have physical and chemical properties that are different from the properties elements of which it is composed.

A substance's physical property is a quality that can be seen or quantified without affecting the substance's identity. Color, density, hardness, and melting and boiling points are examples of physical qualities.

The capacity of a substance to go through a particular chemical transition is described by its chemical property. Rust is a different kind of matter than the iron, oxygen, and water present before the rust formed, hence its production is a chemical change. Chemical attributes include, for instance, flammability, toxicity, acidity, numerous types of reactivity, and heat of combustion.

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In aerobic respiration, nadh is oxidized at complex I during electron transport in the chain, while fadh2 is oxidized at complex II.

GitHub created and maintains the open-source, free software framework known as Electron. The framework is made to enable the development of desktop web apps with a backend running on the Node.js runtime environment and being rendered using a variant of the Chromium browser engine. Unbound or bound to an atom, an electron seems to be a negative charge subatomic particle (not bound). The proton, neutron, and the electron that is attached to an atom are the three main types of particles.

JavaScript, HTML, and CSS can be used to create desktop applications using the Electron framework. With Electron, you can build cross-platform programs that run on Windows, macOS, and Linux with no prior knowledge of native development by incorporating Chromium and Node.js into its binary.

The electron, the smallest elemental part of an atom, has a negative charge. Protons and electrons both occur in equal numbers in neutral atoms. One electron and one proton are all that the hydrogen atom has. On the other hand, the uranium atom has 92 protons, which means 92 electrons.

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the developing solvents were 2% sodium chloride aqueous solution and 2% isopropyl alcohol aqueous solution

Isopropyl alcohol can be "salted out," which uses salt to remove water from the substance and thereby boosts its potency. When salt is added to water, it dissolves, but is insoluble in isopropyl alcohol, which causes the water to become heavier and sink to the bottom while the alcohol floats to the top.

Salt and alcohol do not interact, despite the fact that water and alcohol do. The solution becomes salty when salt is added, but the salt dissolves in the water but not the alcohol.

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The amount of energy required to compress a gas from 121 litres to 80 litres at a constant pressure of 16.7 atm is 6.94*10^4J. When the need for water increases in a system with constant pressure

As the demand for water falls, the pump speed will also decline. The pump only runs as much as required to fulfil demand in order to maintain pressure as efficiently as feasible. Using the following expression, we can determine the work (W) connected to gas compression at constant pressure:

W = -P.V, where P is the outside pressure.

V represents the volume change.

In light of the fact that 1 atm.L = 101.325 J, the work of compression is given by W = -P*(v2 - v1) = -16.7atm*(80.0 - 121.0)*(101.325/1) = 6.94*10^4J.

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The energy gap between the 2s & 2p orbitals widens from boron to fluorine due to the difference in the nucleus's attraction for 2s and 2p.

As would be expected, the energy gap between the 2s and 2p orbitals in atoms like Li, Be, B, C, and N is quite small, which causes the 2s and 2pz orbitals in the diatomic molecule that results from mixing these atoms to overlap. We refer to this as "2s-2p mixing." This causes the energy of 2pz to rise, surpassing that of 2px and 2py, which is not the case for oxygen and fluorine.

Hence, diatomic molecule on s-p mixing result energy gap.

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The average molecular speed at 25°C is: CO₂ < O₂ < N₂ < He.

The speed associated with atom collecting is typical. The particles in an ideal gas do not interact with one another. There are three kinds of molecular speeds: rms (root mean square) velocity, average velocity, and most likely velocity.

A gas's average speed is determined by its molar mass; the smaller the mass, the quicker the average speed.

Average molecular speed is inversely proportional to molar mass.

So, if molar mass is large, average velocity will be small.

Now, order of molar mass is: He < N₂ < O₂ < CO₂

So, order of average speed will be: CO₂ < O₂ < N₂ < He.

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The partial pressure of each component is based on its mole fraction and the given total pressure: PO2=0.622×565 mm Hg=351 mm HgPN2=0.378×565 mm Hg=214 mm.

The partial pressure of N2 N2when the partial pressure of He is 24751 should be 7.47 atm.

What is Partial Pressure?

In a gas mixture, each constituent gas has a partial pressure equal to the notional pressure of its constituent gases as if they alone occupied the entire volume of the original mixture at the same temperature.

Therefore, The partial pressure of each component is based on its mole fraction and the given total pressure: PO2=0.622×565 mm Hg=351 mm HgPN2=0.378×565 mm Hg=214 mm.

The partial pressure of N2 N2when the partial pressure of He is 24751 should be 7.47 atm.

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The molarity of a solution made by dissolving 45.6 g glucose, C₆H₁₂O₆, in enough water to make 350.0 ml of solution is 0.722 M.

given that :

volume = 350 mL = 0.350 L

mass of glucose = 45.6 g

molar mass of glucose = 180.15 g/mol

the number of moles of glucose = mass / molar mass

                                                      = 45.6 / 180.15

                                                      = 0.253 mol

the molarity expression is given as follows :

Molarity = moles / volumes in L

              = 0.253 / 0.350

              = 0.722 M                  

Thus, the molarity of the solution to make 350.0 mL of solution is 0.722 M.          

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For the breakdown of 1 mol of calcite to carbon dioxide plus white precipitate oxide at 25°c, the standard reaction entropy is 160.6 J/mol*K.

In a chemical reaction, one or more materials known as reactants—are changed into one or more additional substances as products. Chemical elements or chemical compounds make up substances.

Synthesis, decomposition, only one, double-replacement, and combustion are the five fundamental varieties of chemical reactions. You can classify a reaction into one of these groups by looking at the reactants and products. Several categories will apply to some reactions.

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The complete question is-

Calculate the standard reaction entropy for the decomposition of 1 mol calcite to carbon dioxide gas and solid calcium oxide at 25°C.

CaCO₃ (s) → CO₂ (g) + CaO (s)

(a). -160.6 J/mol*K

(b). 160.6 J/mol*K

(c). 346.4 J/mol*K

(d). -266.9 J/mol*K

Here, we must select a chemical capable of producing an ion-dipole interaction with ammonia. Only b) NaOH will interact with the ion dipole of the NH3.

How does a dipole of ions operate?

When an ion interacts with a nonpolar molecule, a weak attraction called an ion-induced dipole force is created. In addition, a fully charged ion can polarize a nonpolar molecule by approaching it; as a result, the electrons in the molecule react and produce a dipole.

What makes it an ion-dipole?

Dipole-Ion Interaction

An electrically charged atom or molecule is known as an ion (which is to say the opposite of a neutral molecule). The term "dipole" simply refers to the presence of two poles that are negatively and positively charged. Another name for a molecule having a dipole is a

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The equilibrium law for the nuclide is 0.388 days per one, according to the announcement.

By nuclide, what do you mean?

The amount of protons, protons, and the activity state of nucleus determine the species of atom known as a nuclide, also known as a nuclear species. Thus, a nuclide is identified by its number of protons and mass number (A) (Z).

A nuclide is similar to but distinct from an atom or a nucleus. It has several nucleons, which define it. Nuclide, to put it simply, is a type of atom or nucleus. We characterize it using the elements that make up its nucleus, as well as the quantity of protons, neutron, and energy.

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Pipeline transportation is only available for specialist goods like liquids and gases.

Delicate, invisible particles that are constant motion and layer on top of one another make up liquids. The particles are held together by cohesive forces, yet they are not firmly adhered to one another as in a solid. Despite touching one another, the particles can still pass freely one another.

An liquid is still a sample of stuff that adopts the shape of the container it is stored in and develops a defined surface when gravity is present. The state, or situation, of substance having this attribute is also referred to as liquid.

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Fm1m2 = Gm1m2/r2 * r. A planet with a mass of M and a radius of b is orbited by a moon with a mass of m and a radius of an at a distance of d (center to center).

The quantity of material in a material or an object is measured by its mass. The kilogram (kg) is the fundamental SI unit of mass, while lower masses can also be expressed in grams (g). A balance is what you would use to measure mass.

The kilogram (kg) is the fundamental SI unit of mass, while lower masses can also be expressed in grams (g). A balance is what you would use to measure mass. A triple beams balance can be used to quantify mass in the laboratory.

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The number of moles of NH3 can be produced are 4 moles.

What is a mole?

The mole is the amount of substance in a system that includes the same number of elementary entities as there are atoms in 0.012 kilogram of carbon 12; it is denoted by the sign "mol."

What is a limiting factor?

Limiting factors are reactants or reagents that are used by a chemical reaction before other reactants. The limiting factor is the reactant or reagent with the lowest supply in terms of its required ratio in comparison to other reactants in the system.

According to the question;

Balanced equation would be :

[tex]3H_2 + N_2[/tex]  ⇒ [tex]2NH_3[/tex]

Here, [tex]H_2[/tex] is a limiting factor

No. of moles of ammonia formed when 3 moles of [tex]H_2[/tex] react with excess of [tex]N_2[/tex] =2

applying unitary method:

No. of moles of ammonia formed when 6 moles of [tex]H_2[/tex] react with excess of [tex]N_2[/tex]= [tex]\frac{2}{3 } * 6[/tex] = 4moles.

The number of moles of NH3 can be produced are 4 moles.

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The rate equation illustrates how altering the reactant concentrations affect the rate of the reaction. All of these are incorporated into the so-called rate constant, which is only really constant if the only variable changing is the reactant concentration.

The rate constant is the quantity that describes the connection between the molar concentration of the reactants and the rate of the chemical reaction. At 546 K, the hydrocarbon breakdown rate constant is 2.418 105 s1.

The slower the reaction is at a given temperature, the greater the Ea. The steric factor is the percentage of orientations that cause a response. The Arrhenius equation has a relationship between the rate constant and the frequency factor, steric factor, and activation energy: k=AeEa/RT.

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The recommended pace for CPR compressions for an adult cardiac arrest sufferer is 100 to 120 per minute.

Compressions entail applying particular pressure towards the person's chest with your hands while pressing down quickly and firmly. Compressions constitute the most crucial CPR procedure. When administering CPR compressions, follow these steps: Place the person on a stable surface while holding her back up.

CPR simulates your heart's pumping action by doing chest compressions. These compressions support your body's natural blood circulation. Heart disease and cardiac arrest are not the same thing. A heart condition occurs when the flow to the coronary artery is blocked.

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There are 8 atoms in total in one molecule of H3PO4.

There are 3 atoms of hydrogen, 1 atom of phosphorous and 4 atoms of oxygen in the one molecule of this compound, which is called hydrogen phosphate.

The charge number of an atomic nucleus is known as the atomic number or nuclear charge number (sign Z) of a chemical element. This is equivalent to the proton number (np), or the number of protons present in the nucleus of every atom of that element, for conventional nuclei. Ordinary chemical elements can be uniquely identified by their atomic number. The atomic number and the number of electrons are both equal in a typical, uncharged atom.

The total number of atoms in one molecule can be calculated as :

= 3 (H) + 1 (P) + 4(O)

=8 atoms in total

Therefore, there are 8 atoms in total in one molecule of H3PO4.

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According to ideal gas law ;

PV = nRT where, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

If Volume of system is reduced to half = V/2

then; P = 2(nRT/V), Pressure will be doubled to reestablish the equilibrium.

What is Chemical equilibrium?

Chemical equilibrium, condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is one in which the products, as soon as they are formed, react to produce the original reactants.

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Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, student a and student b are correct.

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.

Mathematically,

q = n ×ΔH

where

q = amount of heat

n = no of moles

ΔH = enthalpy

n = w / M.M

Both students are correct as energy can be positive as well as negative. Any reaction in which energy is added, energy value comes out to be positive and reaction is called endothermic reaction. Any reaction in which energy is released, energy value comes out to be negative and reaction is called exothermic reaction.

Therefore, student a and student b are correct.

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