what is the net change in free energy if one set of reactions from the previous question is coupled so that the overall reaction is favorable? if you selected more than one pair of reactions in the previous question, enter the net change for any one of your selected sets.

The only plate with all margins as convergent boundaries is the Pacific Plate. Convergent boundaries occur when two tectonic plates move toward each other and collide, resulting in the formation of various geological features such as mountains, volcanic arcs, and deep-sea trenches.

The Pacific Plate is the largest tectonic plate on Earth, covering an area of around 103 million square kilometers. It is surrounded by convergent boundaries along its entire perimeter. To the west, it converges with the Eurasian,

Philippine Sea, and Australian Plates, forming the Japan, Kuril-Kamchatka, and Izu-Bonin-Mariana Trenches, as well as the Indonesia and Philippine Trenches. To the east, it converges with the North American and Cocos Plates, resulting in the deep-sea trenches along the western coast of North and Central America, and the formation of the Andes mountain range in South America.

To the south, the Pacific Plate converges with the Antarctic Plate, forming the Pacific-Antarctic Ridge. To the north, it converges with the North American Plate, resulting in the formation of the Aleutian Trench and volcanic arc.

The continuous movement of the Pacific Plate and its surrounding convergent boundaries are responsible for much of the seismic and volcanic activity in the Pacific Ring of Fire, which is home to about 75% of the world's active and dormant volcanoes.

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By making a simple division of the Molar concentrations. The correct option is a.

The equilibrium constant Kc is a measure of the equilibrium between the forward and reverse reactions of a chemical reaction. It is a ratio of the concentrations of the products to the concentrations of the reactants at equilibrium.

The equilibrium constant Kc:

Kc = [products]/[reactants]

here [products] is the concentration of the products at equilibrium and [reactants] is the concentration of the reactants at equilibrium.

If the concentrations of the products and reactants are given in molar concentrations (M), we can express the equilibrium constant as a ratio of Molar concentrations using the following equation:

Kc = [products]M / [reactants]M

Therefore, to find the equilibrium constant Kc, we simply need to divide the Molar concentrations of the products and reactants by their respective coefficients.

Therefore, the correct option is a) by making a simple division of the Molar concentrations.  

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Correct Question:

The equilibrium constant Kc is found:

a) by making a simple division of the Molar concentrations

b) with the quotient of the speed of the products over the reactants

c) dividing the speeds of the equations that form the chemical reaction

d) with the quotient of the concentrations of the substances present in the equation​

When 20.0 g of Potassium reacts with water, 0.256 moles of hydrogen gas are produced.

To determine the moles of hydrogen produced when 20.0 g of potassium reacts with water to form potassium hydroxide and hydrogen gas, follow these steps:

1. Determine the molar mass of potassium (K): The atomic weight of potassium is 39.1 g/mol.

2. Calculate the moles of potassium (K) used: moles = mass / molar mass
  moles of K = 20.0 g / 39.1 g/mol ≈ 0.512 moles

3. Use the stoichiometry of the balanced equation to find the moles of hydrogen (H₂) produced: 2 moles K produce 1-mole H₂, so the ratio is 1:0.5.

4. Calculate the moles of H₂ produced: moles of H2 = moles of K * (1 mole H₂ / 2 moles K)
  moles of H₂ = 0.512 moles * (1/2) ≈ 0.256 moles

So, when 20.0 g of potassium reacts with water to produce potassium hydroxide and hydrogen gas, there are approximately 0.256 moles of hydrogen.

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The given reaction HgO → Hg + O₂ is a decomposition reaction.

The balanced chemical reaction is  2HgO → 2Hg + O₂

A decomposition reaction is a type of reaction in which a particular compound or molecule dissociates or decomposes to form smaller constituent particles.

Combustion is the burning of any substance in presence of oxygen to give out carbon dioxide, water and heat.

In Synthesis reaction , new compounds are synthesized from different reactants.

Displacement reactions involve exchange of cations and anions from reactants to form different products.

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Substituted hydrocarbons are organic compounds that consist of hydrocarbons to which one or more functional groups have been substituted for one or more hydrogen atoms or carbon groups.

The functional group is a specific group of atoms that gives the molecule its characteristic properties and reactions.

Substitution is the process by which one or more hydrogen atoms or carbon groups are replaced by a functional group.

By substituting one or more hydrogen atoms or carbon groups in a hydrocarbon chain, we get a new molecule that has its own characteristic properties.

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Unbalanced forces acting on a Nebula result in a change in its motion.(C)

When unbalanced forces act on a nebula, they disrupt its equilibrium and cause a change in its motion. This is due to Newton's First Law of Motion, which states that an object at rest or in constant linear motion will continue in that state unless acted upon by an unbalanced force.

In the case of a nebula, the unbalanced forces may come from nearby stellar explosions, passing stars, or gravitational interactions.

These forces can cause parts of the nebula to compress and collapse, initiating the formation of new stars and planetary systems. As a result, the motion of the nebula changes over time as it evolves and develops under the influence of these forces.(C)

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The mass of the cube of titanium is 2.02 x 10^6 micrograms.

To find the mass of the cube of titanium in micrograms, we first need to find its volume:

Volume = (edge length)^3 = (3.67 x 10^4 micrometers)^3

            = 4.49 x 10^14 cubic micrometers

Next, we need to convert the density of titanium from grams per cubic centimeter to micrograms per cubic micrometer:

4.5 g/cm^3 = 4.5 x 10^9 micrograms/ (10^4 micrometers)^3

                   = 4.5 x 10^9 micrograms/ (10^12 cubic micrometers)

Now we can calculate the mass of the cube:

Mass = Volume x Density

         = 4.49 x 10^14 cubic micrometers x 4.5 x 10^9 micrograms/ (10^12 cubic micrometers)

         = 2.02 x 10^6 micrograms

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The wavelength of a 66.8 kg person running at a speed of 2.72 m/s through an opening of width 0.80 m is 1.44 m.

Wavelength is a concept used in physics to describe the distance between two points of a wave. It is usually measured in meters or nanometers and is expressed as the inverse of the frequency of the wave. Wavelength is an important concept in fields such as electromagnetism, optics, and acoustics. It is used to describe the size of a wave, the frequency of a wave, and the speed at which a wave travels.

Wavelength (λ) is the distance between two successive crests of a wave. For a person running at a constant speed, the wavelength is determined by the speed of the person and the frequency of the wave.
Frequency (f) is the number of waves passing through a given point in a given time.
So, the wavelength of a 66.8 kg person running at a speed of 2.72 m/s through an opening of width 0.80 m is calculated as follows:
λ = (2.72 m/s) / (2 x 0.80 m) = 1.44 m
Therefore, the wavelength of a 66.8 kg person running at a speed of 2.72 m/s through an opening of width 0.80 m is 1.44 m.

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Ans 1  = 2 fe +3 cl2 = 2 fecl3

blank 1 = 2

blank 2 = 3

blank 3 = 2

Ans.2 = 4fe +3 o2 = 2fe2o3

blank 1 = 4

blank 2 = 3

blank 3 = 2

Ans.3 = c6h6o3 +H2o = 2c2h3

blank 1 = 1

blank 2 = 1

blank 3 = 2

The term that describes a pure substance that is composed of only one type of atom is an element.

An element is a substance that cannot be broken down into simpler substances by chemical reactions. Each element has a unique number of protons in the nucleus of its atoms, which gives it a specific atomic number. For example, the element carbon has an atomic number of 6, meaning that each carbon atom has 6 protons in its nucleus.

Elements are the building blocks of all matter, and there are currently 118 known elements, ranging from hydrogen (which has an atomic number of 1) to oganesson (which has an atomic number of 118). Elements can exist in various states of matter, including solids, liquids, and gases, depending on their temperature and pressure.

Pure substances, like elements, have uniform properties and composition throughout. This means that every particle of an element has the same chemical and physical properties, such as its melting point, boiling point, and density. In contrast, a mixture is composed of two or more substances that are physically combined but not chemically bonded.

Mixtures can be separated into their component parts by physical means, while pure substances cannot.

In summary, an element is a pure substance that is composed of only one type of atom. It cannot be broken down into simpler substances by chemical reactions and has uniform properties and composition throughout.

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The pH of a solution with [H+] = 4.71x[tex]10^-^1^0[/tex] is approximately 9.327, as pH is a measure of the acidity or basicity of a solution as it is defined as the negative logarithm of the concentration of hydrogen ions in moles per liter (pH = -log[H+]).

The lower the pH, the more acidic the solution, while a higher pH indicates a more basic solution. In the given problem, the concentration of hydrogen ions ([H+]) is 4.71x [tex]10^-^1^0[/tex]

To calculate the pH,

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in moles per liter.

Substituting [H+] = 4.71x[tex]10^-^1^0[/tex] into the formula,

pH = -log(4.71x[tex]10^-^1^0[/tex]) = -(-9.327) = 9.327

Therefore, the pH of a solution with [H+] = 4.71x[tex]10^-^1^0[/tex] is approximately 9.327.

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To determine experimentally if a reaction is exothermic, a student should use a calorimeter. A calorimeter is a device used to measure the heat exchange during a chemical reaction, enabling the student to identify if the reaction is exothermic or endothermic. In an exothermic reaction, heat is released, causing the temperature of the surroundings to increase.

To perform the experiment, follow these steps:

1. Choose the appropriate chemical reaction to test.
2. Prepare the calorimeter by placing a known amount of water in the calorimeter's inner container.
3. Measure and record the initial temperature of the water.
4. Add the reactants (in their appropriate amounts) to the water, and quickly seal the calorimeter to minimize heat loss to the surroundings.
5. Stir the mixture gently to ensure proper mixing and heat distribution.
6. Monitor the temperature change of the water over time, recording the highest temperature reached.
7. Calculate the amount of heat released or absorbed by the reaction using the formula: q = mcΔT, where q is heat, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature.
8. If the heat calculated is positive and the temperature increased, the reaction is exothermic; if negative and the temperature decreased, the reaction is endothermic.

In conclusion, a student should use a calorimeter to experimentally determine if a reaction is exothermic, as it allows for the accurate measurement of heat exchange and can indicate whether heat is released or absorbed during the reaction.

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The animal you are describing is a chipmunk. It has a backbone, nurses its offspring, likes to gnaw, has a bushy tail, stores food for winter, and has stripes on its back.

A chipmunk is a small mammal belonging to the Sciuridae family, which also includes squirrels. Chipmunks possess a backbone, making them vertebrates.

As mammals, they nurse theiroffsprin, providing them with nutrients and care. Their sharp incisors allow them to gnaw on various foods, such as nuts and seeds. Their bushy tail is an identifying feature that aids in balance while climbing and jumping.

Chipmunks are known for storing food, particularly during winter months when resources are scarce. This food hoarding is possible due to their cheek pouches, which they use to carry and store food. The distinctive stripes on their back serve as a camouflage, allowing them to blend into their environment and avoid predators.

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The equilibrium expression for the ionization of HOI is:

Kc = [H⁺][OI⁻]/[HOI]

In this expression, [H⁺] represents the concentration of hydrogen ions, [OI⁻] represents the concentration of hypoiodite ions, and [HOI] represents the concentration of the undissociated hypohalous acid. The equilibrium constant, Kc, is a measure of the extent to which the reaction has reached equilibrium.

In the case of HOI, the equilibrium constant can be used to determine the degree of ionization of the acid in solution. If Kc is large, it indicates that the reaction favors the formation of ions and that the acid is strong. If Kc is small, it indicates that the reaction favors the formation of undissociated acid and that the acid is weak. The value of Kc can also be used to calculate the concentrations of the different species in the solution at equilibrium, given the initial concentrations and the stoichiometry of the reaction.

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The complete question is:

Write the equilibrium expression for the ionization of HOI?

Here, 50 mol of SO2 will be created, and 25 mol of lead will be formed from both steps of the reaction.

To determine the moles of SO2 created and moles of lead formed in both steps of the reaction, we'll first need to examine each step individually.

Step 1: PbS + O2 -> PbO + SO2
Starting with 25 mol of PbS, this reaction occurs in a 1:1 molar ratio with SO2. Thus, 25 mol of SO2 will be created in this step.

Step 2: PbO + PbS -> Pb + SO2
Since 25 mol of PbO is created in step 1, the same amount of PbS is available to react in step 2. This reaction also occurs in a 1:1 molar ratio with SO2, meaning that another 25 mol of SO2 will be created in this step.

The total amount of SO2 created in both steps is the sum of the moles produced in each step:
25 mol (from step 1) + 25 mol (from step 2) = 50 mol of SO2

Additionally, since the second step forms lead (Pb) in a 1:1 molar ratio with PbS, we will have 25 mol of lead formed.

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The concentration of the potassium hydroxide solution is 1.4 mol/dm³.

To calculate the concentration of the potassium hydroxide (KOH) solution, we can use the formula:

moles of acid = moles of base

For a titration involving hydrochloric acid (HCl) and potassium hydroxide (KOH), the balanced chemical equation is:

HCl + KOH → KCl + H2O

From the balanced equation, we can see that 1 mole of HCl reacts with 1 mole of KOH. Given the volume and concentration of the acid, we can first find the moles of HCl:

moles of HCl = volume (dm³) × concentration (mol/dm³)
moles of HCl = 0.035 dm³ × 2 mol/dm³
moles of HCl = 0.07 moles

Since moles of acid = moles of base, we have:

moles of KOH = 0.07 moles

Now, we can find the concentration of KOH:

concentration of KOH (mol/dm³) = moles of KOH / volume of KOH (dm³)
concentration of KOH = 0.07 moles / 0.050 dm³
concentration of KOH = 1.4 mol/dm³ (rounded to 1 decimal place)

Thus, the concentration of the potassium hydroxide solution is 1.4 mol/c.

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The final pressure of the gas is 1,430 mmHg.

Using the combined gas law, we can relate the initial pressure, volume, and temperature to the final pressure and volume:

(P₁V₁)/T₁ = (P₂V₂)/T₂

where P₁, V₁, and T₁ are the initial pressure, volume, and temperature, and P₂ and V₂ are the final pressure and volume.

Plugging in the given values, we get:

(850 mmHg x 1.5 L)/288 K = (P₂ x 2.5 L)/308 K

Solving for P₂, we get:

P₂ = (850 mmHg x 1.5 L x 308 K)/(2.5 L x 288 K) = 1430 mmHg

Therefore, 1,430 mmHg is the final pressure of the gas.

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Buffer solutions are made by mixing a weak acid and its conjugate base or a weak base and its conjugate acid. The pH of a buffer solution remains relatively constant when small amounts of an acid or a base are added to it.

Therefore, salt solutions containing the conjugate acid-base pair of a weak acid or a weak base could be used to prepare a buffer solution.

For example, to prepare an acetate buffer solution, one could mix a solution of sodium acetate ([tex]NaOAc[/tex]) with acetic acid ([tex]HOAc[/tex]).

The [tex]OAc^-[/tex]anion in the sodium acetate solution acts as a weak base and reacts with any added[tex]H^+[/tex] ions to form[tex]HOAc[/tex], which acts as a weak acid and buffers the solution's pH. Similarly, the [tex]NH4^+[/tex] cation in ammonium chloride ([tex]NH4Cl[/tex]) can react with [tex]OH^-[/tex]ions to form [tex]NH3[/tex], which acts as a weak base and buffers the pH of the solution.

Therefore, salt solutions containing the conjugate acid-base pair of a weak acid or a weak base can be used to prepare buffer solutions.

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1. 2 moles of Calcium 8016 grams = 8.01x103 grams, 2. 3 moles of Sodium 69 grams = 2.07x1023 particles, and many more given below:

Calcium is an essential mineral that is found in the human body. It is necessary for the proper functioning of many organs, including the heart and muscles. Calcium is also important for the formation and maintenance of healthy bones and teeth. It plays a role in nerve and muscle function, blood clotting, and hormone secretion. Adequate calcium intake is important for both children and adults to ensure proper growth, development, and overall health.

3. 392 grams of Technetium = 9.10x1022 particles

4. 3.01x1024 particles of Chromium = 8.41x10-2 moles

5. 5 moles of Fluorine = 25 grams

6. 24 grams of Helium = 4.67x1023 particles

7. 1.806x1024 particles of Sulfur = 4.86x10-2 moles

8. 3 moles of Platinum = 195.2 grams

9. 240 grams of Argon = 6.67x1023 particles

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The uranium rod undergoes a temperature change of 2.41°C when 3.4 kJ of heat is added to it

To work out the adjustment of temperature of the uranium pole, we can utilize the equation:

Q = m * c * ΔT

Where Q is the intensity added, m is the mass of the uranium pole, c is the particular intensity of uranium, and ΔT is the adjustment of temperature.

In the first place, we want to change over the mass of the pole from kilograms to grams:

m = 1.4 kg * 1000 g/kg = 1400 g

Then, we can rework the recipe to settle for ΔT:

ΔT = Q/(m * c)

Subbing the given qualities:

ΔT = (3.4 kJ)/(1400 g * 0.12 J/gC) = 2.41 C

This arrangement utilizes the recipe Q = m * c * ΔT to work out the adjustment of temperature of a 1.4 kg uranium pole when 3.4 kJ of intensity is added. The mass is switched over completely to grams, and the particular intensity of uranium is utilized to find ΔT, which is viewed as 2.41°C.

Hence, the uranium pole goes through a temperature change of 2.41°C when 3.4 kJ of intensity is added to it.

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To solve this problem, we need to use the balanced chemical equation for the reaction of Potassium and water:

2K + 2H2O → 2KOH + H2

This equation tells us that for every 2 moles of Potassium that react with water, we get 1 mole of hydrogen gas.

So, if we have 20.0 g of Potassium, we need to first convert this to moles using the molar mass of Potassium:

20.0 g K x (1 mol K / 39.10 g K) = 0.511 mol K

Now we can use the stoichiometry of the balanced equation to find the moles of hydrogen produced:

0.511 mol K x (1 mol H2 / 2 mol K) = 0.255 mol H2

Therefore, there are 0.255 moles of hydrogen produced in the reaction.:

2K + 2H2O → 2KOH + H2

This equation tells us that for every 2 moles of Potassium that react with water, we get 1 mole of hydrogen gas.

So, if we have 20.0 g of Potassium, we need to first To solve this problem, we need to use the balanced chemical equation for the reaction of Potassium and water:

2K + 2H2O → 2KOH + H2

This equation tells us that for every 2 moles of Potassium that react with water, we get 1 mole of hydrogen gas.

So, if we have 20.0 g of Potassium, we need to first convert this to moles using the molar mass of Potassium:

20.0 g K x (1 mol K / 39.10 g K) = 0.511 mol K

Now we can use the stoichiometry of the balanced equation to find the moles of hydrogen produced:

0.511 mol K x (1 mol H2 / 2 mol K) = 0.255 mol H2

Now we can use the stoichiometry of the balanced equation to find the moles of hydrogen produced:

0.511 mol K x (1 mol H2 / 2 mol K) = 0.255 mol H2

Therefore, there are 0.255 moles of hydrogen produced in the reaction.

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The mass of CO2 produced is 20.9 g

The formula of the limiting reactant is O2

The reactant that produces the smallest amount of product is the limiting reactant.

Number of moles of glucose = 9.91 g/180 g/mol

= 0.055 moles

Number of moles of oxygen = 15.2 g/32 g/mol= 0.475 moles

1 mole of glucose reacts with 6 moles of oxygen

0.055 moles of glucose reacts with 0.055 * 6/1

= 0.33 moles

Thus oxygen is the limiting reactant

Mass of CO2 produced = 0.475 moles * 44 g/mol

= 20.9 g

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The discrepancy gap between customer expectations and perceptions towards service quality of front office staff/night auditor is commonly referred to as the "service gap."

This gap arises when customers have certain expectations regarding the level of service they will receive, but their actual perceptions of the service fall short of those expectations.

The service gap can be caused by a variety of factors, including inadequate training of front office staff, poor communication between staff and customers, inconsistencies in service delivery, and failure to meet customer needs and preferences.

To reduce the service gap, it is important for organizations to have a clear understanding of customer expectations and to ensure that their service delivery meets or exceeds those expectations.

This may involve implementing better training programs for front office staff, improving communication with customers, and implementing systems for monitoring and measuring customer satisfaction.

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There are 3530.88 grams of sulfuric acid (H₂SO₄) dissolved in a 2-liter solution that is 18 molar.

To calculate the grams of sulfuric acid (H₂SO₄) dissolved in a 2-liter solution that is 18 M (molar), you can follow these steps:

1. Determine the moles of H₂SO₄ in the solution:
Moles of H₂SO₄ = Molarity × Volume of solution
Moles of H₂SO₄ = 18 M × 2 L = 36 moles

2. Calculate the grams of H₂SO₄ using the molar mass:
Grams of H₂SO₄ = Moles × Molar mass of H₂SO₄
The molar mass of H₂SO₄ = (2 × H) + (1 × S) + (4 × O) = (2 × 1.01) + (32.07) + (4 × 16.00) = 98.08 g/mol

3. Multiply the moles of H₂SO₄ by its molar mass:
Grams of H₂SO₄ = 36 moles × 98.08 g/mol = 3530.88 grams

So, 3530.88 grams of sulfuric acid (H₂SO₄) are dissolved in a 2-liter solution that is 18 molar.

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Heat equations are mathematical equations that are used to calculate the amount of heat energy transferred between two objects. The first heat equation, q = mcꕔt, relates the amount of heat transferred (q) to the mass of the object (m), the specific heat capacity (c), and the temperature change (ꕔt).

The specific heat capacity is the amount of heat energy required to raise the temperature of one gram of a substance by one degree Celsius. The second heat equation, q = mlvapor, relates the amount of heat required to vaporize a substance (q) to the mass of the substance (m) and the latent heat of vaporization (lvapor).

The latent heat of vaporization is the amount of heat required to transform a unit mass of a substance from a liquid phase to a gaseous phase. Finally, the third heat equation, q = mlfusion, relates the amount of heat required to melt a substance (q) to the mass of the substance (m) and the latent heat of fusion (lfusion).

The latent heat of fusion is the amount of heat required to transform a unit mass of a substance from a solid phase to a liquid phase.

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Here, 47.29 mg of chlorine is needed to react with 0.175g of gold.

To calculate the mass of chlorine needed to react with 0.175g of gold, we will use the equation and the relative atomic masses provided.

1. First, find the moles of gold:

Moles of gold = mass / relative atomic mass

Moles of gold = 0.175g / 197g/mol

                       = 0.0008883 mol

2. According to the balanced equation, 2 moles of gold react with 3 moles of chlorine. So, we need to find the moles of chlorine required:

Moles of chlorine = (3/2) * moles of gold

Moles of chlorine = (3/2) * 0.0008883 mol

                             = 0.001332 mol

3. Now, find the mass of chlorine needed:

Mass of chlorine = moles of chlorine * relative atomic mass

Mass of chlorine = 0.001332 mol * 35.5g/mol

                            = 0.04729g

4. Finally, convert the mass from grams to milligrams:

Mass of chlorine in mg = 0.04729g * 1000mg/g

                                      = 47.29mg

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The number of calories in 10 grams of sugar is an example of an intensive property. So the correct answer is 1.

Intensive properties are properties that do not depend on the amount or size of the sample being measured. In this case, the number of calories is a characteristic of sugar that remains constant regardless of the amount of sugar being measured. Other examples of intensive properties include density, boiling point, melting point, and color. On the other hand, extensive properties are properties that do depend on the amount or size of the sample being measured, such as mass, volume, and energy. Unique and chemical are not related to the concept of intensive or extensive properties. Correct Option 1.

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--The complete Question is, Fill in the blanks.

The number of calories in 10 grams of sugar is an example of a(n) ___________________.

Answer:

Yes, radioactive decay will change the identity of an atom.

Explanation:

This is because the radioactive decay involves the emission of particles that change the number of protons in the nucleus. The number of protons is what determines the identity of the atom.

Answer:

in most instances, the atom changes its identity to become a new element

Explanation:

The term mole concept is used here to determine the number of grams of sucrose. The mole concept is a convenient method to express the amount of the substance. The grams of sucrose is  1509.5 g.

One mole of a substance is that amount of it which contains as many particles or entities as there are atoms in exactly 12 g of carbon 12. The equation used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

1. Mass = 4.41 × 342.3 = 1509.5 g

2. Moles = 350 / 105.98 = 3.302

3. Mass = 7.38 × 36.45 = 269.001 g

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