Which is the ground- state electron configuration for Neon?

Answer:

3.33 tanques de O₂

Explanation:

Basados en la reacción:

2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O(g)

2 moles de acetileno reaccionan con 5 moles de oxígeno produciendo 4 moles de dióxido de carbono y 2 moles de agua

La ley de Avogadro dice que el volumen de un gas bajo temperatura y presión constantes es proporcional a las moles de este gas. Así, como 2 moles de acetileno reaccionan con 5 moles de oxígeno, los litros de O₂ necesarios para quemar 9340L de acetileno son:

9340 L C₂H₂ × (5 moles O₂ / 2 moles C₂H₂) = 23350L de O₂

Si un tanque contiene 7x10³ L de O₂ serán necesarios:

23350L O₂ ₓ (1 tanque / 7x10³L) = 3.33 tanques de O₂

After, after 12 hours, we would anticipate roughly 27 mutations to be present in the S. aureus population in your foot wound.

Part 1-

First, the size of the S. aureus population in the wound in your foot should be found. Let's assume that the population size is 1 million (1 x 10^6) cells.

The  mutations estimated in one generation per cell are:

1 mutation per 10¹⁰base pairs

The base pairs in the genome of S. aureus are 2.8 x 10⁶

Therefore, the expected number of mutations per generation per cell is:

(2.8 x \(10^{6}\)) / (\(10^{10}\)) = 2.8 x \(10^{-4}\) mutations per cell per generation

To estimate the number of mutations in the population which occur after 12 hours the number of generations that have passed needs to be known. The generation time of  S. aureus is approximately 30 minutes, so the number of generations in 12 hrs (hours) will be:

12 hrs x (60 minutes/hr) / (30 minutes/generation)

= 24x4 equals 96 generations

In 96 generations the approximate number of mutations per cell is:

96 generations x 2.8 x \(10^{-4}\) mutations per cell per generation

= 0.027 mutations per cell

If we multiply mutations per cell by the number of cells in the population, to know the total number of mutations in the population:

i.e.,0.027 mutations taking place per cell x 1 x 10⁶ cells gives 27 mutations

Therefore, after 12 hours, we can expect approximately 27 mutations to be present in the population of S. aureus inside the wound in your foot.

Estimatedly, 0.0028 mutations will take place per cell in the population. After the end of 12 hours, 0.0028 * 16,777,216 = 46,976 new mutations will exist.

Part 2-

The implications of this genetic diversity in the context of treating possible infections is that host genetic diversity is thought to reduce the possibility that the disease will widen in natural populations.

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Incomplete question. However, I provided a specific example of stewardship of the atmosphere.

Explanation:

First, note that the term stewardship refers to the belief that humans are obligated to take care and look after our environment (which includes the atmosphere.

An example of this is: deciding to change our mode of transportation: What this entails is that we may decide to switch to riding a bicycle to places rather than going by car. By so doing you will be reducing the number of greenhouse gases emitted into the environment as bicycles do not emit harmful gases when used.

15538.50 grams of gasoline would be fill a 5.6 gal tank if the density of gasoline is 0.733 g/ml.

The term Density is the substance's mass per unit of volume. The symbol most often used for density is ρ. D can also be used for density. The density of a material varies with temperature and pressure. This variation is small for solids and liquids but much greater for gases. Increasing the pressure on an object decreases the volume of the object and thus increases its density. Increasing the temperature of a substance decreases its density by increasing its volume.  Mathematically, density is defined as mass divided by volume.

Density = M/ V

M is the mass and Vis the Volume.

A particular brand of gasoline has a density of 0.733 g/ml at 25C.

1 US Gallon is 3785.41 ml

5.6 Gallon will be 5.6 x 3785.41 ml = 21198.296 ml

So the mass contained is 0.733g/ml x 21198.296  ml = 15538.50 grams

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The characteristic of the substrate that the active site of ADH must recognize is option A: "hydrogen atom located on a carbon next to a with an-OH group (vicinal position)".

This is because ADH is an enzyme that catalyzes the oxidation of alcohols to aldehydes or ketones. In order for this reaction to occur, the substrate must have a hydrogen atom located on a carbon next to an -OH group. This allows the enzyme to recognize the substrate and catalyze the reaction.

Without this characteristic, the enzyme will not be able to recognize the substrate and the reaction will not occur.

ADH specifically recognizes and binds to this particular feature of the substrate through its active site, which has a complementary shape and chemical properties to the substrate. This binding allows the enzyme to position the substrate in a way that facilitates the transfer of a hydrogen ion and a pair of electrons to the coenzyme NAD+ to form NADH, while producing an aldehyde or ketone.

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The characteristic of the substrate that the active site of ADH must recognize is option A: "hydrogen atom located on a carbon next to a with an-OH group (vicinal position)".

This is because ADH is an enzyme that catalyzes the oxidation of alcohols to aldehydes or ketones. In order for this reaction to occur, the substrate must have a hydrogen atom located on a carbon next to an -OH group. This allows the enzyme to recognize the substrate and catalyze the reaction.

Without this characteristic, the enzyme will not be able to recognize the substrate and the reaction will not occur.

ADH specifically recognizes and binds to this particular feature of the substrate through its active site, which has a complementary shape and chemical properties to the substrate. This binding allows the enzyme to position the substrate in a way that facilitates the transfer of a hydrogen ion and a pair of electrons to the coenzyme NAD+ to form NADH, while producing an aldehyde or ketone.

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We need to add 2.73 mL of the concentrated acid to obtain a total volume of 175 mL of the dilute solution.

Molarity is defined as the number of moles of solute per liter of solution. A solution that contains one mole of solute per liter of solution is said to be 1 molar (1 M).

We wish to make a 0.186 M nitric acid solution from a stock solution of 12.0 M nitric acid and we want to obtain a total volume of 175 mL of the dilute solution, the amount of concentrated acid we need to add can be determined using the formula shown below: M1V1 = M2V2 where:

M1 is the initial molarity (concentration) of the concentrated acid (12.0 M)

V1 is the initial volume of the concentrated acid (unknown)

M2 is the final molarity (concentration) of the dilute solution (0.186 M)

V2 is the final volume of the dilute solution (175 mL)

Rearranging the formula above, we get: V1 = (M2V2) / M1

Substituting the values given: M1 = 12.0 MM2 = 0.186 MV2 = 175 mL= 0.175 L

Therefore: V1 = (0.186 M x 0.175 L) / 12.0 M= 0.00273 L = 2.73 mL (to two decimal places)

Hence, we need to add 2.73 mL of the concentrated acid to obtain a total volume of 175 mL of the dilute solution.

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The major product when each reagent reacts with ethylene oxide are 2-chloroethanol, 2-hydroxyethanol, and 2-aminoethanol,

The major product that will be formed when each reagent reacts with ethylene oxide will depend on the type of reagent that is used.

1. When ethylene oxide reacts with a strong acid such as HCl, the major product will be 2-chloroethanol. The reaction is as follows:
CH2OCH2 + HCl → CH2ClCH2OH

2. When ethylene oxide reacts with a strong base such as NaOH, the major product will be 2-hydroxyethanol (also known as ethylene glycol). The reaction is as follows:
CH2OCH2 + NaOH → CH2OHCH2OH + Na+

3. When ethylene oxide reacts with a nucleophile such as NH3, the major product will be 2-aminoethanol. The reaction is as follows:
CH2OCH2 + NH3 → CH2NH2CH2OH

Overall, the major product that is formed when ethylene oxide reacts with a reagent will depend on the type of reagent that is used. The reactions listed above are just a few examples of the many possible reactions that can occur with ethylene oxide.

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The percentage of calcium carbonate in the limestone is approximately 1.76%.

First, let's write the balanced chemical equation for the reaction between calcium carbonate and hydrochloric acid:

CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)

From the equation, we see that one mole of CaCO3 reacts with two moles of HCl. We can use the volume and concentration of HCl to calculate the number of moles of HCl:

60.00 cm3 of 3.000 mol dm−3 HCl = 0.06000 L × 3.000 mol dm−3 = 0.180 mol HCl

Since one mole of CaCO3 reacts with two moles of HCl, the number of moles of CaCO3 in the limestone is half the number of moles of HCl:

0.180 mol HCl ÷ 2 = 0.090 mol CaCO3

Next, we can use the volume and concentration of NaOH to calculate the number of moles of NaOH used in the neutralization:

35.50 cm3 of 1.000 mol dm−3 NaOH = 0.03550 L × 1.000 mol dm−3 = 0.03550 mol NaOH

From the balanced equation, we know that one mole of CaCO3 reacts with one mole of NaOH. Therefore, the number of moles of CaCO3 in the 25.00 cm3 sample is:

0.03550 mol NaOH × 1 mol CaCO3/1 mol NaOH = 0.03550 mol CaCO3

To find the percentage of calcium carbonate in the limestone, we can use the following formula:

% CaCO3 = (moles of CaCO3 in limestone / mass of limestone) x 100%

We know the moles of CaCO3 in the limestone (0.090 mol), but we need to find the mass of the limestone. We started with 2.00 g of limestone and added enough water to make a total volume of 100.0 cm3. Therefore, the mass of the solution is 2.00 g + the mass of the water added. The density of water is 1.00 g/cm3, so the mass of the water added is:

100.0 cm3 - 2.00 g / 1.00 g/cm3 = 98.00 g

Therefore, the mass of the solution is 2.00 g + 98.00 g = 100.00 g. The mass of the limestone is:

mass of limestone = 2.00 g × (moles of CaCO3 in limestone / moles of CaCO3 in the sample)

mass of limestone = 2.00 g × (0.090 mol / 0.03550 mol) = 5.10 g

Now we can calculate the percentage of calcium carbonate in the limestone:

% CaCO3 = (0.090 mol / 5.10 g) × 100% ≈ 1.76%

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Considering the definition of pure substance and homogeneous mixture, the main difference is that a pure substance consists of only one type of particle and it cannot be separated or divided into more substances whereas a homogeneous mixture is made up of two or more different substances and can be separated into various pure substances.

A pure substance is one that is made up of a single type of particle, whether atoms or molecules, and therefore has the same properties in all its parts. The composition and properties of an element or compound are uniform anywhere in a given sample, or in different samples of the same element or compound.

When a substance is made up of two or more simple substances, it is known as a mixture. Homogeneous mixtures are characterized by being formed by two or more components that cannot be distinguished visually. The composition and properties are uniform throughout any given sample, but may vary from sample to sample. In general, the components of a homogeneous mixture can be in any proportion, and can be recovered using physical separation methods.

The main difference between a pure substance and a mixture is that a pure substance consists of only one type of particle and it cannot be separated or divided into more substances whereas a homogeneous mixture is made up of two or more different substances and can be separated into various pure substances.

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Answer:

Hydrocholoric acid is a strong acid-all of the acid molecules will release their protons into a solution, making it very acidic. Ethanoic acid, on the other hand, is a weak acid-it will only donate some of its hydrogen ions into a solution, making it less acidic than hydrochloric acid solution.

Explanation:

The hazard of dilute hydrochloric acid is generally lower than the hazard of concentrated ethanoic acid, despite hydrochloric acid being a strong acid and ethanoic acid being a weak acid, due to differences in their concentrations and chemical properties.

Concentrated ethanoic acid, also known as glacial acetic acid, has a high concentration of acid molecules, typically around 99%. This means that it can cause severe chemical burns and can be very corrosive when it comes into contact with skin or other materials. In addition, it releases strong, pungent vapors that can irritate the eyes, nose, and throat.

On the other hand, dilute hydrochloric acid has a lower concentration of acid molecules, usually around 5-10%, making it less corrosive and less hazardous. While hydrochloric acid is a strong acid, its low concentration reduces its reactivity and corrosivity. However, it still poses some hazards, such as being an irritant to the eyes, skin, and respiratory tract.

Therefore, while the strength of an acid is an important factor in determining its hazards, the concentration and other chemical properties of the acid are also crucial factors to consider.

In the case of dilute hydrochloric acid and concentrated ethanoic acid, the difference in their concentrations and chemical properties contributes to the difference in their levels of hazard.

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The general equation for the reaction of a halogen with a metal (assuming a 2+ charge on the metal) is: 2M + X₂ → 2MX

In this equation, M represents the metal (with a 2+ charge) and X represents the halogen. The reaction involves the combination of one mole of the metal with one mole of the halogen to form two moles of the metal halide compound (MX).

The 2M on the left side of the equation represents two moles of the metal, each with a 2+ charge. The X₂ represents one mole of the halogen, which exists as a diatomic molecule (e.g., Cl₂, Br₂, I₂).

During the reaction, the metal atoms lose two electrons each to achieve a stable 2+ charge, and the halogen atoms gain one electron each to complete their valence shell. This results in the formation of two moles of the metal halide compound (MX) in which the metal is in its 2+ oxidation state and bonded to the halogen.

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To accurately classify the changes in the PhET simulation's effect on the wavelength, a description of the available changes and their respective bins is necessary In general, changes that can affect the wavelength in a wave simulation include adjusting the frequency, amplitude, speed, or medium properties.

Each of these changes can have a specific effect on the wavelength of the wave. For example, increasing the frequency generally results in a shorter wavelength, while decreasing the frequency leads to a longer wavelength. Similarly, altering the amplitude may not directly affect the wavelength but can impact the intensity or energy of the wave.

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Answer:

See the answer below

Explanation:

In chemistry, indicators are substances that are capable of changing colors with respect to the pH. Each indicator has its characteristic color in acidic pH and another characteristic color in alkaline pH.

Methyl orange indicator appears red in acidic solution and yellow in basic solutions. Phenolphthalein is usually colorless in acidic solutions and appears pink in basic solutions. A red litmus paper will turn blue in alkaline solutions while a blue litmus paper will turn red in acidic solutions.

Answer:

16

Explanation:

When we add or subtract the values the number of significant figures after decimal in result must be equal to the given measurement having less number of decimal places.

When we multiply or divide the values the number of significant figures must be equal to the less number of significant figures in given value.

3.5×4.48697

16

Using the ideal gas law it is concluded that 9.87 grams of H₂ occupy 90.52L volume at 1.34 atm and 27 degrees C.

The macroscopic properties of ideal gases are addressed by the ideal gas law (PV = nRT). The particles of an ideal gas do not attract or repel one another and take up no space (have no volume).

It is given, pressure (P) = 1.34 atm, temperature (T) = 27°C (300k)           Let's say 1 mol of H₂ gas occupies v volume.

We know, PV = nRT

⇒ 1.34 × v = 1 × 0.0826 × 300            

⇒ v = 18.49L

So, 1 mol of H₂ gas occupies 18.49L volume.

Now, we have 9.87 gm H₂ gas.

We know 1 mole of H₂ gas = 2.015882gm H₂ gas.

9.87 gm of H₂ gas = (1 × 9.87)/2.015882 mole

9.87 gm of H₂ gas = 4.89611 mole
Now, volume occupied = 18.49 × 4.89611
Volume occupied = 90.52 L

So, the 4.89611 moles of H₂ gas occupies 90.52 L volume.

Therefore, 9.87 grams of H₂ occupy 90.52L volume at 1.34 atm and 27 degrees C.

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Answer:

Al2o3 grams to moles

Explanation:

You can view more details on each measurement unit: molecular weight of Al2O3 or grams This compound is also known as Aluminium Oxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Al2O3, or 101.961276 grams.

Answer:

Beryllium

Explanation:

The element that has 4 energy levels and 2 valence electrons is Beryllium.

Beryllium is a chemical element that comes in the second row and is an alkaline earth metal.

It is silvery-white, and very brittle at room temperature.

Its properties are similar to aluminum.

It has two valence electrons in the k shell and two in L shell.

Thus, the correct element is Beryllium.

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Noncovalent interactions between elements in the same molecule are known as intramolecular interactions.

Describe element noun.

I made the decision to walk in spite of the awful weather by braving the elements. New component required for the kettle. For the vast majority of home buyers, having a second source of income is crucial. They have all the qualities of a strong squad. Although she exaggerated, there was some truth to what she said.

Which words are equivalent to "element"?

element Units that are a portion of whole or entire substances, organizations, compounds, or combinations are referred to as elements, components, constituents, or ingredients. Element refers to a fundamental, essential component: the building blocks of matter; break the issue down into its component parts.

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Answer:

B. 2 electrons are removed from the atom

Explanation:

The charge of an ion of calcium (Ca) is +2, which means that the calcium atom has lost 2 electrons.

Therefore, the correct answer is B. 2 electrons are removed from the atom.

Answer:

c

Explanation:

Answer:

C. Thermal energy. Potential energy is stored energy when. it's released it becomes kinetic energy. Activation isn't a type of energy.

The energy change in the chemical reaction has been thermal energy. Thus, option C is correct.

The chemical reaction has been given as the reaction in which the reactants have been converted into products. The products have varying chemical structure and properties than reactants.

The bond formation and bond breaking has been mediated with the absorption or release of the heat from the bonds. The heat has been able to change the surrounding environment of the chemical reaction.

Heat has been a form of thermal energy. Thus, thermal energy change in the chemical reaction has been taken in bond breaking and forming. Hence, option C is correct.

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Given that the enthalpy change for the reaction is -67 kJ, the reaction is exothermic, and energy is released as the reaction occurs.

Enthalpy refers to the amount of energy that is stored in a compound's chemical bonds or the heat released or absorbed during a chemical reaction. It is a thermodynamic property that determines the quantity of energy released or absorbed during a process such as chemical reaction or change in state.

When a reaction absorbs energy from its surroundings, it is known as an endothermic reaction. The reaction's enthalpy, which is the energy released or absorbed during a reaction, is positive. The system absorbs energy, which is why it is denoted by a positive value.

When a reaction releases energy into the surrounding, it is referred to as an exothermic reaction. The reaction's enthalpy, which is the energy released or absorbed during a reaction, is negative. The system releases energy, which is why it is denoted by a negative value.

Therefore, the reaction is exothermic and energy is released when the reaction occurs.

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Answer:

Chlorine

Explanation:

Since chlorine is above bromine in the periodic table, following the trends of ionization energy in the periodic, the further up you go the more energy is required to ionize an atom.  

To calculate the amount of money you would spend on gas in one week while driving 113 km per day in Europe,  gas costs we need to convert the given values and perform some calculations.

1 km = 0.621371 miles

So, 113 km is approximately equal to 70.21 miles (113 km * 0.621371).

Miles per gallon (mpg) = 28.0 mi/gal

Miles driven per week = 70.21 mi/day * 7 days = 491.47 miles/week

Gallons consumed per week = Miles driven per week / Miles per gallon = 491.47 mi/week / 28.0 mi/gal ≈ 17.55 gallons/week

1 euro = 1.26 dollars

Cost per gallon = 1.10 euros/gallon * 1.26 dollars/euro = 1.386 dollars/gallon

Total cost per week = Cost per gallon * Gallons consumed per week = 1.386 dollars/gallon * 17.55 gallons/week ≈ 24.33 dollars/week

Therefore, if gas costs 1.10 euros per liter, and your car's gas mileage is 28.0 mi/gal, you would spend approximately 24.33 dollars on gas in one week while driving 113 km per day in Europe.

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A concentration of 0.01M should be used for NaOH to titrate a sample that contains 250 mg of aspirin.

Aspirin 250 mg = 0.250/molar mass.

NaOH is needed for every mole of aspirin.

Since M = mols NaOH/L NaOH, I am unable to respond to your query without knowing the size of the burette you want to employ.

I wouldn't want to use any of them, in fact.

I was always told that if we used a 50 mL burette, we should titrate a sample using roughly 40 mL.

The answer is not 0.00139/0.04L = about 0.035M. What I would do is this.

Make a decision based on the volume that each of the responses would provide you.

either L = mols/M or M = mols/L

The first one yields 0.00139/0.01 = 0.139 or 139 mL, which indicates that there were multiple 50 mL burets of NaOH present. Never utilize more than one burst of material at a time.

The next number is 0.00139/0.1 = 0.0139, or 14 mL. Since it increases the mistake when little amounts are utilized, I honestly wouldn't choose this option, but it's probably the best of the three.

The final one is 1.39 mL, which is too little: 0.00139/1 = 0.00139 L.

You should select the middle option, in my opinion.

You may be wondering what I would do. I would use roughly three times as much of the 750 mg sample, which results in 0.750/180 = approximately 0.0042 mol and 0.0042 mols/0.01M = 0.042 L, or 42 mL.

Hence, 0.01M concentration should be used for NaOH to titrate a sample that contains 250 mg of aspirin.

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The statement is true.The weight of 11.2 liters of carbon dioxide at STP would be 44.0.

This statement is true. Here is why:STP is short for Standard Temperature and Pressure. The conditions of STP are usually taken as 273.15 K (0°C) and 100 kPa (1 bar).1 mole of CO2 weighs 44.01 grams. At STP, the volume occupied by one mole of a gas is 22.4 liters. So, at STP, 44.01 grams of CO2 would occupy 22.4 liters. Therefore, the weight of 11.2 liters of carbon dioxide at STP would be half of 44.01 grams, which is 22.005 grams. Since the question does not specify the units, it is safe to assume that the weight is being measured in grams.The weight of 11.2 liters of carbon dioxide at STP is 22.005 grams. This is approximately half the weight of one mole of CO2 (44.01 grams) since 11.2 liters is approximately half the volume occupied by one mole of CO2 (22.4 liters) at STP.

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Answer:

B

Explanation:

i think with exothermic reactions heat is released

this is what i looked up

hope this helps i took chem last year and think this is what i learned

Considering the definition of exothermic and endothermic reactions, the correct answer is second option: the reaction is endothermic.

Energy is the ability to do work or to produce heat.

Remembering that chemical reactions involve a reorganization of atoms between substances with breaking or formation of chemical bonds, this formation or breaking of chemical bonds is accompanied by changes in the energy of the system.

Chemical reactions that release heat are called exothermic. That is, an exothermic reaction is one where energy flows out of the system.

So, at room temperature, the heat released by a chemical reaction is enough to cause a rise in temperature.

An endothermic reaction is one that requires heat to take place. In other words, a chemical reaction is endothermic when it absorbs energy from the environment.

In this case, the heat is transferred from the outside to the inside of the system. By absorbing heat, the effect of an endothermic reaction is to lower the temperature.

When ammonium chloride is dissolved in water, the beaker gets cold. That means the system is absorbing heat from the surrounding and the temperature does down.

So, the correct answer is second option: the reaction is endothermic.

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Answer:

No of Moles in excess at the end of the reaction  is 0.25 moles

Explanation:

AgNO3  +   Mg3P2  → Ag3P + Mg(NO3)2

Balancing the equation we get

6AgNO3  +   Mg3P2  → 2Ag3P + 3Mg(NO3)2

6 moles of AgNO3 needs 1 mole of Mg3P2

using unitary method

AgNO3 = \(\frac{1}{6}*Mg3P2\)

1.5 AgNO3 = \(\frac{1}{6}*1.5\)

                  = 1/4 = 0.25moles of Mg3P2

So 1.5 Moles of AgNO3 requires 0.25Mg3P2 for complete reaction but we have 0.5Moles of Mg3P2 available Therefore Mg3P2 is in excess

No of Moles in excess at the end of the reaction = 0.5 - 0.25 = 0.25moles

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