What is the mass of 6.02 x 1023 particles of rubidium carbonate

Answer:

So a sodium atom has the electronic configuration 2,8,1 meaning it has 1 electron on its outer shell. It has a neutral charge since the number of electrons is equal to the number of protons.

A sodium ion is one that has lost the electron on its valence shell. The electronic configuration is 2,8 and it has a positive charge because it has more protons than electrons.

Answer:

\(\boxed {\boxed {\sf Number \ of \ electrons \ and \ net \ charge}}\)

Explanation:

Remember that protons have a positive charge of +1 and electrons have a negative charge of -1. Atoms have protons and electrons.

A sodium atom has the electron configuration of 2-8-1. It has 11 electrons and its atomic number (number of protons) is also 11. This means it is a neutral atom because the charges of the electrons (-11) and protons (+11) balance each other out.

However, a sodium ion is different. It loses the 1 valence electron, so it only has 10 electrons. It still has the same atomic number of 11.

It is a not a neutral atom because the charges of the electrons (-10) and protons (+11) do not balance out. It has more protons and a net positive charge of +1. It is a cation or a positively charged ion.

When equal masses of ch4(g) and o2(g) are placed in a container, exerting a total pressure of 600 torrs, then the partial pressure of ch4(g) will be 300torr

Let, x gm o2 and ch4 are present

Given,

Total Pressure = 600torr

Number of moles of o2 = x/16

Number of moles of Ch4 = x/16

According to the Daltons law of partial pressure,

Pa =Xa*Ptotal

Xa is the mole fraction of a

Xch4 =\(\frac{x/16}{x/16 +x/16}\)

         =1/2 = 0.5

Pch4 = 0.5×600 = 300torr

Therefore the partial pressure of ch4 will be 300 torr when a total pressure of 600 torr is applied to the mixture.

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Answer:

Gas

Explanation:

If you move a substance from one container to another and its volume changes, the substance is a gas. This is because, gases do not have fixed volume and shape; their shape and volume depend on the container used.

Answer:

I think gas.

Explanation:

Because gas doesn't have fixed shape and size.

A. Calculation of pH of the solution:KF is a strong electrolyte. Solubility of MgF₂ in the 0.150 M KF solution is 2.64 × 10⁻⁴ M.

When dissolved in water, it ionizes completely to produce one potassium ion (K⁺) and one fluoride ion (F⁻).

So, the concentration of F⁻ ions is equal to the concentration of KF. Here, KF is acting as a source of F⁻ ions. Its ionization in water is given below:

KF (aq) → K⁺ (aq) + F⁻ (aq)

Thus, [F⁻] = 0.150 M

The hydrolysis reaction of fluoride ions isF⁻ (aq) + H₂O (l) ⇌ HF (aq) + OH⁻ (aq)

Initial Conc. 0.150 0 0Eqbm Conc. -x +x +x

Kb = Kw/Ka = 1.76 × 10⁻¹⁴ / 6.8 × 10⁻⁴

= 2.59 × 10⁻¹¹

Kb = [HF] [OH⁻] / [F⁻]x² / (0.150 - x)

= 2.59 × 10⁻¹¹

Now, as the concentration of F⁻ ions is much greater than 1 × 10⁻⁷ M, we can neglect the small amount of x from 0.150 M.

So, the final concentration of F⁻ ions is 0.150 M.x² / 0.150 = 2.59 × 10⁻¹¹

∴ x = 2.56 × 10⁻⁶ M

So, [HF] = [OH⁻] = 2.56 × 10⁻⁶ M

Now, pOH = -log[OH⁻] = -log(2.56 × 10⁻⁶)

= 5.59pH = 14 - pOH

= 14 - 5.59 = 8.41

The pH of the solution is 8.41.

B. Calculation of solubility of MgF2 in the 0.150 M KF solution:

Magnesium fluoride (MgF₂) is an insoluble salt.

Its solubility product is given by the expression

Ksp = [Mg²⁺][F⁻]²At 25°C,

the value of Ksp is 7.4 × 10⁻¹⁰.MgF₂(s) ⇌ Mg²⁺(aq) + 2F⁻(aq)

Now, the concentration of F⁻ ions is 0.150 M and that of Mg²⁺ is unknown.

Let the concentration of Mg²⁺ be x M.So, the equilibrium concentration of F⁻ ions will be 2x M.

Now, the solubility product expression can be written as 7.4 × 10⁻¹⁰ = x(2x)²

= 4x³

∴ x = (7.4 × 10⁻¹⁰ / 4)¹/³

= 2.64 × 10⁻⁴ M

Solubility of MgF₂ in the 0.150 M KF solution is 2.64 × 10⁻⁴ M.

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Answer:

C₂H₄ + 3O₂  →    2CO₂  + 2H₂O

Explanation:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

3H₂O   →  3H₂ + 3O₂

This equation do not follow  the law of conservation of mass because there are more oxygen atoms on right side so mass is not conserved.

C₂H₄ + 3O₂  →    2CO₂  + 2H₂O

This equation follow the law of conservation of mass because there are equal number of atoms of all elements on both side of equation.

C  + 4H₂   →   CH₄

This equation do not follow the law of conservation of mass because there are more hydrogen atoms on left side of equation so mass is not conserved.

2Na  + Cl    →  NaCl

This equation also do not follow the law of conservation of mass because there are more sodium atoms on left side of equation so mass is not conserved.

The conjugate acid of H₂O is  OH-.

A conjugate acid, within the Brønsted–Lowry acid-base theory, is a chemical compound shaped when an acid donates a proton (H+) to a basein different words, it is a base with a hydrogen ion introduced to it, as in the reverse response it loses a hydrogen ion.

Each time an acid donates a proton, the acid changes right into a base, and each time a base accepts a proton, an acid is fashioned. An acid and a base which fluctuate best via the presence or absence of a proton are known as a conjugate acid-base pair.

The formulation of the conjugate acid is the formula of the bottom plus one hydrogen ion. allow us to illustrate this gadget the use of the neutralization of hydrochloric acid with sodium hydroxide. when hydrochloric acid reacts with hydroxide ions, water and chloride ion are formed.

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Answer:

The volume of the gas is 0.015 m^3.

Explanation:

mass, m = 32 g

Temperature, T = 45 °C = 45 + 273 = 318 K

Pressure, P = 728 mm of hg = 0.728 x 13.6 x 1000 x 9.8 = 97027.84 Pa

Atomic mass = 4 x 12 + 10 x 1 = 58 g

Use the ideal gas equation

Let the volume is V.

P V = n R T

\(97027.8 \times V = \frac{32}{58}\times 8.31 \times 318 \\\\V = 0.015 m^3\)  

Explanation:

The volume of the gas occupied can be calculated by using the ideal gas equation:

\(PV=nRT\)

where,

P=pressure of the gas in atm

V=volume of the gas in L.

n=number of moles of the gas

R=0.0821L.atm.mol-1.K-1

T=absolute temperature

To get the volume of the gas, follow the below steps:

1) Calculate the number of moles of gas:

Number of moles of butane=mass of butane given/its molecular mass

\(=32g/58.0g/mol\\=0.55mol\)

2) Convert temperature into kelvin scale:

T=(45+273)K=318K

3)Convert pressure into atm:

760 mm Hg =1 atm

then,

728 mm Hg=

728 mm Hg x 1 atm /760 mm Hg

=0.957 atm

Substitute all these values in the ideal gas equation to get the volume:

\(V=\frac{nRT}{P} \\V=0.55mol x 0.0821 L.atm.mol-1.K-1 x 318K / 0.957 atm\\V=15.0L\)

Answer:

The volume of butane gas is 15.0 L

A) The number of H₂O molecules in 0.23 moles is equal to 1.5 × 10²³.

B) The single displacement reaction is,

Ca + 2HCl →  CaCl₂ + H₂

C)  The double displacement reaction is,

Na₂SO₄ + 2NH₄Cl → 2NaCl  + (NH₄)₂SO₄

A displacement reaction is one in which a set of atoms in a molecule are replaced by another set of atoms.

When an element leaves its compound or when one element is replaced by another from its own compound, a single displacement reaction can be demonstrated as a type of redox reaction.

In aqueous solutions, double displacement reactions take place where ions precipitate and exchange ions.

Hydrogen gas and calcium chloride are produced in a single displacement reaction between calcium and HCl acid.

Ca + 2HCl →  CaCl₂ + H₂

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Percent by mass of volatile water in hydrated salt (%): 32.7

Average percent H_2O in hydrated salt (% H_2O): 32.7

Hydration is the process of adding moisture or water to a substance, such as a plant or an animal, to keep it healthy. Hydration is essential for the optimal functioning of cells and organs in the body, and for maintaining the balance of fluids in the body. Hydration helps to keep the body’s temperature regulated, and helps to transport nutrients and other substances throughout the body. Hydration also helps to reduce fatigue and increase alertness.

It is important to stay hydrated by drinking plenty of water throughout the day. In addition to water, other drinks such as sports drinks, coconut water, and fruit juices can help to keep the body hydrated. Eating foods that have a high water content, such as fruits and vegetables, can also help to ensure adequate hydration.

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Answer:

6

Explanation:

Answer:

6

Explanation:

C6

Carbon 6

Answer: I believe the answer is 12

Explanation:

Area of triangle = 1/2(b)(h)

So, area = (1/2 × 4 × 6)m^2

= (2 × 6)m^2

= 12 m^2

Answer:

7.00335g

Explanation:

\(n=\frac{V}{V_m} \\n = \frac{11.2}{22.4} \\n= 0.5 mol\)

\(n=\frac{m}{M} \\m=nM\\m=(0.5)(14.0067)\\m=7.00335g\)

Answer:d

b/c the bohr atomic model say that the electron are present in the orbits where the modern physics suggests that according to hisenberg uncertainity principle u cannot locate an electron but can find its maximum probibility in a given region and that is named as orbital

The statement best describes an orbital is according to the quantum mechanical model of the atom, it is a three dimensional region of space where there is a 90% probability of finding an electron at any given moment in time. Therefore, option D is correct.

The quantum mechanical model of atoms describes the three-dimensional position of the electron in a probabilistic manner using a mathematical function known as a wave function, which is frequently denoted as. Orbitals are another name for atomic wavefunctions.

The quantum mechanical model determines the allowed energies of an electron and the likelihood of finding the electron in different locations around the nucleus.

Electrons in the same atom with the same principal quantum number (n) or principal energy level are said to occupy an electron shell of the atom in the quantum-mechanical model of an atom. Orbitals are regions of space where electrons are likely to be found.

Thus, option D is correct.

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p-Dichlorobenzene is more soluble in hexane than in water. p-dichlorobenzene, also known as para-dichlorobenzene, is a type of chlorinated hydrocarbon that is commonly used as a moth repellent and deodorizer.

In terms of its solubility, p-dichlorobenzene is considered to be only slightly soluble in water, with a solubility of around 5.5 mg/L at 25°C. This means that it will not dissolve very well in water and will tend to remain as a separate layer or suspension.

On the other hand, p-dichlorobenzene is much more soluble in organic solvents such as hexane, with a solubility of around 14 g/L at 25°C. This means that it will dissolve readily in hexane and similar solvents, forming a homogeneous solution.

Overall, the solubility of p-dichlorobenzene is relatively low in water but much higher in organic solvents. This is due to the fact that it is a nonpolar compound, which means that it is not attracted to the polar molecules that make up water. Instead, it is attracted to other nonpolar molecules, which are abundant in organic solvents like hexane.

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Answer:

C

Explanation:

This is a correct answer i think soo

Answer:

2 i think if not than its 4

Explanation:

Answer:

3 if its not than 4

Explanation:

D. Grasslands are converted to cropland

As the human population grows, individuals use land in a variety of ways to suit their requirements, including housing, agriculture, industry, and transportation.

This usually results in more urbanization and the change of natural habitats to human-dominated environments. Some examples of common land-use shifts are:

D. Grasslands are converted to cropland: As food need grows, grasslands are frequently converted to cropland for agricultural production. This can result in soil degradation, biodiversity loss, and other environmental consequences.

As the human population expands, so does the need for resources and space, resulting in a variety of changes in land usage. The conversion of natural habitats such as forests and grasslands into human-dominated landscapes is one of the major land-use shifts.

This process, referred to as urbanization, frequently includes the creation of buildings, roads, and other infrastructure to support human activity. Furthermore, as the demand for food and other agricultural products grows, more land is converted to agriculture.

These land-use changes can have serious environmental consequences, such as habitat loss, soil degradation, and biodiversity loss. As a result, it is critical to think about the potential repercussions of land usage and design sustainable practices that balance human demands with environmental conservation.

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The distinct behavior and characteristics of these two metal ions can be used to explain why more chromium(III) sulfate is added during electroplating but less copper(II) sulfate is added during copper plating.

The stability and behavior of the metal ions involved determine whether extra chromium(III) sulfate should be added during electroplating or not during copper plating.

More chromium(III) sulfate must be added because chromium(III) ions are less stable and have a tendency to precipitate. On the other hand, copper plating does not require additional copper(II) sulfate since copper(II) ions are continually released by the copper anode.

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Missing parts;

During electroplating it is necessary to add more chromium (iii). Sulfate but during copper plating using a cooper anode it is not necessary to add more copper (ii) sulfate explain this difference

Answer:

Explanation:

Molar Mass of C3H12 (I don't think this chemical exists anywhere but on paper so I'll solve it that way, but check to see if you have written the question correctly.)

3C = 3 * 12 = 36

12*H = 12*1 = 12

Total       = 48 grams

mols = given mass / molar mass

Given mass = 14.0156 grams

Molar mass = 48 grams

moles = 14.0156 / 48

mols = 2.900 mols

Notes

Answer:

b. \(\% diss =4.4x10^{-2}\%\)

Explanation:

Hello there!

In this case, given the ionization reaction of HClO as weak acid:

\(HClO\rightleftharpoons H^++ClO^-\)

We can write the equilibrium expression as shown below:

\(Ka=3.5x10^{-8}=\frac{[H^+][ClO^-]}{[HClO]}\)

In such a way, via the definition of x as the reaction extent, we can write:

\(3.5x10^{-8}=\frac{x^2}{[HClO]}\)

As long as Ka<<<<1 so that the x on the bottom can be neglected. Thus, we solve for x as shown below:

\(x=\sqrt{3.5x10^{-8}*0.18} =\\\\x=7.94x10^{-5}M\)

And finally the percent dissociation:

\(\% diss=\frac{x}{[HClO]} *100\%\\\\\% diss=\frac{7.94x10^{-5}M}{0.18}*100\% \\\\\% diss =0.044\%=4.4x10^{-2}\%\)

Which is choice b.

Best regards!

Answer:

Ionization energy : energy required to take out an electron from the valance orbital of an atom.

Electron affinity: electron affinity of an atom measures the amount of energy released when an electron is forcibly entered or pushed into the valence orbital of an atom.

Ionization energy is the energy required to make an atom into a positive ion. Electron affinity is the energy released when an atom becomes a negative ion.

ionization energy is what is required to remove one electron from a normal gaseous atom to produce a +1 anion of that atom.

electron affinity is the energy required to remove one electron from a gaseous -1 anion of an atom to produce a normal gaseous atom.

Answer:

if you could copy and paste the text or a picture of the options, i'd be more than happy to answer

Explanation:

:)

Variations in water density produce deep-ocean currents. Ocean currents are predominantly horizontal flows of water.

A continuous, directed movement of seawater caused by a variety of factors operating on the water, including as wind, and Coriolis effect, breaking waves, cabbeling, as well as temperature and salinity changes. Depth contours, shoreline patterns, as well as interaction with other currents all impact the direction and strength of a current.

Ocean currents are predominantly horizontal flows of water. An ocean current moves for long distances, forming the global conveyor, that plays a significant role in shaping the temperature of many of the Earth's areas. Variations in water density produce deep-ocean currents.

Therefore, variations in water density produce deep-ocean currents.

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The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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Answer:

There are several factors that contribute to the preservation of impact craters on the surface of bodies in the Solar System.

One factor is the lack of erosion or weathering on these bodies. Many of the bodies in the Solar System, such as the Moon and many of the outer planets' moons, do not have atmospheres or hydrospheric systems (like oceans, lakes, or rivers) that can erode or weather the surface over time. This means that the surface of these bodies is not subjected to the same types of processes that can wear away or smooth out surface features on Earth. As a result, impact craters and other surface features can remain well-preserved for millions of years.

Another factor that can contribute to the preservation of impact craters is the presence of a surface layer of material that is resistant to erosion. For example, on the Moon, the surface is covered by a layer of fine-grained dust called regolith, which is made up of small rocks and particles that have been ground up by impact and other processes. This regolith layer is relatively soft and easily disturbed, but it also acts as a protective layer that can preserve the underlying surface features. Similarly, on some of the outer planets' moons, there may be a layer of ice or other materials that can act as a protective layer and preserve impact craters and other surface features.

Examples of bodies in the Solar System that have well-preserved impact craters include the Moon, Mars, and many of the outer planets' moons, such as Europa and Ganymede. The lack of erosion and the presence of protective surface layers on these bodies have allowed them to maintain countless well-preserved indications of impacts on their surfaces even after many millions of years.

Explanation:

To solve this, we must know each and every concept behind solar system. Therefore, impact craters enable scientists to investigate the geological history of a planet.

The Solar System is composed of the Sun and the objects that orbit it. It was created by the gravitational collapse of a massive interstellar molecular cloud 4.6 billion years ago. The Sun contains the vast bulk of the system's mass (99.86%)

Several processes contribute to the preservation of impact craters on the surfaces of Solar System worlds. The absence of erosion or weathering on these bodies is one cause. Another aspect that can aid in the preservation of impact craters is the existence of an erosion-resistant surface layer of material.

Therefore, impact craters enable scientists to investigate the geological history of a planet.

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With thoracentesis Pyothorax is fluid removed from the chest has a very foul odor which is option D.

A invasive medical treatment called a thoracentesis—also known as a pleural tap, a needle thoracostomy, or needle decompression—is used to extract fluid or air from the pleural space for diagnostic or therapeutic purposes. Usually following the injection of local anaesthesia, a cannula, or hollow needle, is gently inserted into the thorax. Morrill Wyman carried out the operation for the first time in 1850, and Henry Ingersoll Bowditch reported it the following year, in 1852.

The place that is advised changes based on the source. The midaxillary line, at the eighth, ninth, or tenth intercostal space, is advised by certain authors. The treatment should, wherever feasible, be carried out using ultrasound guidance since it has been demonstrated to lower problems. Prior to inserting a chest tube, a tension pneumothorax need urgent needle decompression.

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Complete question:

You are assisting with thoracocentesis and the fluid removed from the chest has a very foul odor. Which of the following types of pleural effusions is most likely?

Chylothorax

Hemothorax

Pneumothorax

Pyothorax

Answer:

Heat is something you can't control

Explanation:

Plastic is something you could control like moving it around

Answer: Δ H = -3.293 x 100 J/mol = -329.3 KJ/mol

Explanation:

The formula for density (d) is (d) = (M) Mass / (V) Volume

So,

Mass of solution (M) = volume(V) x density(d)

According to the given question,

V = 54.5 ml

D = 1.0 g/ml

M = V x d = (54.5 x 1.0) = 54.5 g

What is the principle of calorimetry?

According to principle of calorimetry, heat absorbed by the bodies (cold) bodies is equal to the heat released by the bodies (hot).

Heat released by the reaction = Heat absorbed by the solution = (q)

Q=MC ΔT

Q = mass (M) x specific heat (C) x temperature change of solution (ΔT)

Here,

M = 54.5

C = 4.18

ΔT = (24.7-22.4)

Q = 54.5 x 4.18 x (24.7 – 22.4)

Q = 523.963 J

Moles of Zn = mass/molar mass of Zn

Here,

Mass = 0.104 g

Molar Mass of Zn = 65.38 u

Mole of Zn = 0.104/65.38 = 0.0015907 mol

Change in Heat (ΔH) = [-heat released by reaction (q)] / moles of Zn

Q = -523.963

Mole of Zn = 0.0015907

Δ H = -523.963/0.0015907

Δ H = -3.293 x 100 J/mol = -329.3 kJ/mol

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Answer:

Answere-d.

Explanation:

it changes shape but not volume.