Limestone (CaCO₃) is used to remove acidic pollutants from smokestack flue gases. It is heated to form lime (CaO), which reacts with sulfur dioxide to form calcium sulfite. Assuming a 70.% yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 8.5X10⁴ kg of coal that is 0.33 mass % sulfur?

The molarity of the 500 mL KOH solution needed to neutralize the 40 mL of 2.50 M HCl is 0.2 M

HCl + KOH —> KCl + H₂O

From the balanced equation above,

The mole ratio of the acid, HCl (nA) = 1

The mole ratio of the base, KOH (nB) = 1

MaVa / MbVb = nA / nB

(2.5 × 40) / (0.15 × Vb) = 1

100 / (Mb × 500) = 1

Cross multiply

Mb × 500 = 100

Divide both side by 500

Mb = 100 / 500

Mb = 0.2 M

Thus, the molarity of the KOH solution needed is 0.2 M

Learn more about titration:

https://brainly.com/question/14356286

Answer:

No

Explanation:

Answer: smallest whole numbers are 2, 7, 4 and 6

Explanation: C2H6 + 3.5 O2. ⇒ 2. CO2 + 3 H2O

John Dalton was born in Eaglesfield, England, to a Quaker family. He attended a Quaker school and became a math and philosophy tutor at the New College in Manchester. He then joined the Manchester Literary and Philosophical Society and pursued his interest in meteorology. He also researched color blindness, which he theorized was hereditary and proved to be true when genetic analysis of his own eye tissue revealed that he was missing the photoreceptor for perceiving the color green. His interest in atmospheric pressures eventually led him to a closer examination of gases, discovering that air was a mechanical system composed of small individual particles that used pressure applied by each gas independently.

Dalton's Law of Partial Pressures is a scientific principle that states that the total pressure of a mixture of gases is the sum of the partial pressures that each individual gas exerted while occupying the same space. It can be demonstrated using a simple experiment involving a glass bottle and a large bowl of water. It has many practical applications today, such as scuba divers using it to gauge pressure levels at different depths of the ocean. John Dalton was an international chemist who discovered the atomic theory in 1844. His research changed the face of chemistry and initiated its progression into modern science.

Explanation:

Neon, Argon and Krypton are in the same Group on periodic table they contain full valence electron shells in common.

Therefore,

Option D is correct ✔.

Ne, Ar, and K have full valence electron shells. Thus, option D is correct.

The periodic table has been consisted of metals, nonmetals, and metalloids. The elements in the periodic table have been arranged with the increasing number of valence electrons from left to right of the periodic table.

Ne, Ar, and K have been consisted in the last column of the periodic table and are noble gases. The elements are least reactive with the complete outer octet of the electronic configuration.

Thus, Ne, Ar, and K have full valence electron shells. Thus, option D is correct.

For more information about the periodic table, refer to the link:

https://brainly.com/question/13403103

Answer:

167.5g

Explanation:

From the question, we know the mass of NaCl and the molar mass of NaCl, so we can calculate the number of moles of NaCl:

Moles = mass ÷ molar mass

The molar mass of NaCl can be calculated by adding the relative formula masses of the elements Na and Cl:

23.0 + 35.5 = 58.5

We can use the formula to find the number of moles of NaCl:

moles = 138 ÷ 58.5

= 2.35897...

Now, we need to find the mass of Cl2. Rearranging the formula of moles = mass ÷ molar mass

mass = moles × molar mass

Calculating the molar mass of Cl2 by adding the relative atomic masses:

35.5 + 35.5 = 71

Hence the mass is:

2.35897... × 71 = 167.5g (to 1dp)

The world is divided into large areas based on their average temperatures and precipitation is called climate zones.

The principal zones that are demarcated by lines of latitude due to which the earth can be divided on the basis of climate. Tropical zone, Subtropics zone, Temperate zone and Cold zone are the four types of climatic zones.

So we can conclude that large areas based on their average temperatures and precipitation is called climate zones.

Learn more about climate here: https://brainly.com/question/17922964

The world is divided into large areas called climate zones based on their average temperatures and precipitation.

Climate zones are areas of the Earth that results from differences in climate such as temperature, humidity, amount of precipitation etc.

Climate zones of the globe are as follows:

Therefore, it can be said that the world is divided into large areas called climate zones based on their average temperatures and precipitation.

Learn more about climate zones at: https://brainly.com/question/1080277

The elements in the given set arranged in order of increasing electronegativity are: Br < N < I < O, where Bromine has the lowest EN, followed by Nitrogen, Iodine and Oxygen has the highest EN.

First, we need to identify the trends of electronegativity in the periodic table. Electronegativity increases across a period from left to right and decreases down a group.

Hence, Iodine being at the bottom of the halogen group has the least electronegativity, followed by Bromine and then Oxygen. Nitrogen being in group 15 has higher electronegativity than Bromine and Iodine but less than Oxygen.

Therefore, the elements in the given set arranged in order of increasing electronegativity are: Br < N < I < O, where Bromine has the lowest EN, followed by Nitrogen, Iodine and Oxygen has the highest EN.

In conclusion, using the periodic table, we can arrange elements based on their electronegativity, which helps us understand the chemical behavior of these elements in different compounds and reactions.

For more question on Electronegativity

https://brainly.com/question/24977425

#SPJ11

The correct answer is: N < O < Br < I.

To arrange the elements in order of increasing EN (electronegativity) using the periodic table, you need to look at the trends in EN across a period (row) and down a group (column).

In this set, N is in group 15 and period 2, O is in group 16 and period 2, Br is in group 17 and period 4, and I is in group 17 and period 5.

Across a period, EN generally increases from left to right as the atoms have a greater effective nuclear charge due to the increasing number of protons in the nucleus. This trend would suggest that I has the highest EN, followed by Br, N, and O.

However, down a group, EN generally decreases as the atoms get larger and the valence electrons are farther from the nucleus, making them less attracted to it. This trend would suggest that N has the lowest EN, followed by O, Br, and I.

Since the trend down a group is stronger than the trend across a period, the correct order is N < O < Br < I.

Learn more about electronegativity click here:

https://brainly.in/question/3744014

#SPJ11

Answer:

+2

Explanation:

Protons are positive and electrons are negative, this ion has more positive charges than negative charges therefore the overall charge of the ion is +2.

+26 + -24 = +2

If an ion has 26 protons and 24 electrons, the charge of the ion will be +2.

HOW TO DETERMINE CHARGE OF AN ION:

Learn more about how to calculate charge of an ion at: https://brainly.com/question/14471616?referrer=searchResults

\(\qquad \qquad\huge \underline{\boxed{\sf Answer}}\)

Here's the solution ~

1 mole of NaCl weigh 58 grams

2 moles of NaCl weigh (58 × 2) = 116 grams

therefore, the correct choice is A.)

\(\qquad \sf  \dashrightarrow \: 116 \: g\)

The mutated amino acid at position 229 is arginine (Arg), and its substitution can potentially disrupt the 3D structure and alter the function of the protein due to changes in side chain properties and interactions.

Structure of the Amino Acids:

The wild-type amino acid at position 229 is not specified, so the structure cannot be provided.

The mutated amino acid is arginine (Arg), which has a side chain containing a positively charged guanidinium group.

Importance of the Position:

The specific position 229 in the protein sequence may be functionally significant, such as being involved in protein-protein interactions, binding sites, catalytic activity, or structural stability.

Without detailed knowledge of the protein, its function, and its structural context, it is difficult to determine the exact importance of this specific position.

Effects of the Mutation on Structure and Function:

The substitution of an amino acid at position 229 from the original to arginine can have various effects on protein structure and function.

Arginine's larger and positively charged side chain may introduce steric clashes or alter electrostatic interactions within the protein structure.

The mutation can potentially disrupt local or global protein folding, stability, or conformational changes, affecting its overall 3D structure.

The functional consequences of the mutation depend on the specific role of the amino acid at position 229, which can include changes in protein-protein interactions, enzymatic activity, substrate binding, or signal transduction pathways.

It is crucial to analyze the protein's structural context, available experimental data, and computational modeling techniques to gain a more accurate understanding of the specific effects of the mutation on the protein's structure and function in the given context.

Learn more about Amino Acids from the given link:

https://brainly.com/question/31872499

#SPJ11

The number of moles in 33g of carbon dioxide is 0.75 moles.

A mole refers to the amount of a substance that contains as many elementary units as can be found in 12g of Carbon-12. It can also be a number of a substance /particles, such as atoms or ions. molecules or electrons.  The number of particles is approximately 6.02* 10²³ in magnitude and is called Avogadro's number of particles. it can be denoted with 'mol'.

n = m/Mm

Where,

n = number of moles of the substance (or element)

m= mass of the substance (or element)

Mm=Molar mass of the substance (or element)

we must first divide the sample size by the molar mass of carbon dioxide= C0₂

            =(6*2 ) + (8 * 2)*2

              =44. g.

the number of moles  of carbon dioxide molecules in 33 grams of carbon dioxide=m/Mm

         n =33÷44

            =0.75 moles.

Learn more about moles at

brainly.com/question/27918196

#SPJ1

The pKa of a weak acid that is 33% dissociated at pH 5.0 is approximately 4.83.

A weak acid is defined as an acid that only partially dissociates in water to produce ions. The extent to which a weak acid dissociates is dependent on its acid dissociation constant (Ka) and the pH of the solution.

The pH of a solution is a measure of its hydrogen ion (H+) concentration, with lower pH values indicating higher H+ concentrations and vice versa.

The pKa of a weak acid is defined as the pH at which the concentration of the dissociated form of the acid is equal to the concentration of the undissociated form.

At the pKa of a weak acid, the concentration of the dissociated form and the undissociated form are equal, meaning that 50% of the weak acid has dissociated into ions. If we know the extent of dissociation at a particular pH, we can calculate the pKa using the equation:

pKa = -log10(Ka) = -log10([H+]/[HA])

where [H+] is the hydrogen ion concentration, [HA] is the concentration of the undissociated form of the acid, and Ka is the acid dissociation constant.

In this case, the weak acid is 33% dissociated at pH 5.0, meaning that [H+]/[HA] = 0.33. We can use this information to calculate the pKa:

pKa = -log10(0.33) = log10(1/0.33)

pKa = 0.52 + log10(3)

pKa = 0.52 + 0.48

pKa = 1.0

So, the pKa for the weak acid is approximately 4.83.

To know more about pKa here:

https://brainly.com/question/15074297#

#SPJ11

The percentage yield of oxygen obtained from the reaction, given that 400 g of potassium chlorate was heated is 73.4%

2KClO₃ —> 2KCl + 3O₂

Molar mass of KClO₃ = 122.5 g/mole

Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g

Molar mass of O₂ = 32 g/mole

Mass of O₂ from the balanced equation = 3 × 32 = 96 g

SUMMARY

From the balanced equation above,

245 g of KClO₃ decomposed to produce 96 g of O₂

From the balanced equation above,

245 g of KClO₃ decomposed to produce 96 g of O₂

Therefore,

400 g of KClO₃ will decompose to produce = (400 × 96) / 245 = 156.7 g of O₂

Percentage yield = (Actual /Theoretical) × 100

Percentage yield = (115 / 156.7) × 100

Percentage yield = 73.4%

Learn more about stoichiometry:

https://brainly.com/question/14735801

#SPJ4

Answer:

B. 73.40%

Explanation:

I AM JUST HIM

Answer:

It’s actually 130 degrees Celsius.

Explanation:

The element that we can be able to use for the experiment in place of potassium is sodium.

We know that the elements that can be found in the same group does react in the same way. Now we know that we have to look about among the options so that we would be able to know element that is in the same group as potassium.

Given that both sodium and potassium are members of group 1, we have to look out for the element that element thus we have to select sodium.

Learn more about group of elements:https://brainly.com/question/5460947

#SPJ1

Answer:

5.4

Explanation:

V1=5.0

T1=25+ 273=298

V2= z(unknown)

T2=5+273=278

V1/T1 =V2/T2

V2=V1T2/T1

=5*298/278

=5.4

Diels-Alder response is a response of diene and dienophile , when dienophile contains a pi bond adjoining to the pi bond reacting with diene a method called secondary orbital overlap which leads to selectivity of the response.

In endo arrangement the adjacent pi bond creates opportunity for extra frontier orbital interaction. This more interplay stabilizes the transition state.

When the reactants are arranged in an exo configuration no such interaction is feasible that is why endo product is more solid than exo product.

The transition state in chemical reactions is a fleeting and high-energy intermediate state that marks the point of maximum progression towards the products. It represents the point of highest potential energy during a reaction, when the bonds between the reactant molecules are breaking and new bonds between the product molecules are forming.

The transition state is crucial to understanding the rate and mechanism of a reaction. It is characterized by a unique arrangement of atoms and bonding, and its stability determines the energy required for the reaction to proceed. Understanding the transition state is essential for controlling the rate and outcome of chemical reactions, and can be used in the development of catalysts to improve reaction efficiency and specificity. In summary, the transition state is a fleeting and high-energy stage in a chemical reaction, where the bonds between reactants break and new bonds between products form.

To learn more about Transition state visit here:

brainly.com/question/22472755

#SPJ4

Complete Question: -

Because the exo form is more stable than the endo form, why is the endo product formed almost exclusively at low temperatures (or with short reaction times at high temperatures)

The reaction is the preparation of cis-norbornene-5,6-endo-dicarboxylic anhydride from cyclopentadiene, maleic acid, ethyl acetate, and ligroin. In addition to the main product

In addition to the main products, what is an important side reaction that could occur in this experiment? Why is it not a problem for our reaction method?

At 25°C, acetone (CH3COCH3) would have a greater vapor pressure compared to ethanol (CH3CH2OH) because it has a lower boiling point.

Based on the boiling points, we can predict which compound, acetone or ethanol, would have the greater vapor pressure at 25°C.

Step 1: Compare the boiling points of the two compounds.
- Acetone (CH3COCH3) has a boiling point of 56°C.
- Ethanol (CH3CH2OH) has a boiling point of 78°C.

Step 2: Understand the relationship between boiling point and vapor pressure.
- Compounds with lower boiling points have higher vapor pressures at a given temperature because they evaporate more readily.

Step 3: Determine which compound has the greater vapor pressure at 25°C.
- Since acetone has a lower boiling point (56°C) compared to ethanol (78°C), it will have a greater vapor pressure at 25°C.

At 25°C, acetone (CH3COCH3) would have a greater vapor pressure compared to ethanol (CH3CH2OH) because it has a lower boiling point.

to learn more about boiling point click here:

https://brainly.com/question/40140

#SPJ11

Answer:

To make sure all the sulphuric acid has been used up

The bicarbonate buffer system equation, CO2 + H2O ↔ H2CO3 ↔ H+ + HCO3–, plays a crucial role in maintaining the pH balance of the blood. When there is an increase in blood CO2 levels.

As CO2 accumulates in the blood, it reacts with water (H2O) to form carbonic acid (H2CO3) through the action of the enzyme carbonic anhydrase. Carbonic acid then dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3–). This increase in H+ ions leads to a decrease in blood pH, resulting in acidosis.

In obstructive respiratory conditions, due to impaired exhalation, the elimination of CO2 is hindered, leading to its buildup in the bloodstream. This increase in CO2 shifts the equilibrium of the bicarbonate buffer system to the right, favoring the formation of carbonic acid (H2CO3) and subsequently increasing the concentration of H+ ions. This shift towards more H+ ions decreases blood pH, causing respiratory acidosis.

Respiratory acidosis occurs when the blood pH falls below the normal range (pH < 7.35). It can lead to symptoms such as shortness of breath, confusion, fatigue, and in severe cases, can affect vital organ functions.

To compensate for respiratory acidosis, the kidneys increase their reabsorption of bicarbonate ions (HCO3–) and excrete more hydrogen ions (H+) in the urine. This renal compensation helps restore the acid-base balance by gradually returning blood pH toward normal levels.

It is important for individuals with obstructive respiratory conditions to receive appropriate medical treatment and management to alleviate airway obstruction, improve ventilation, and help regulate blood CO2 levels and pH.

To learn more about  buffer

https://brainly.com/question/8676275

#SPJ11

The empitical formula shows the simplest ratio of elements in a compound (not the total number of atoms in the molecule).

So to find the empirical formula we need to calculate how many moles of each atom we have in this sample. Then we will see the ratio of each element.

We are given the mass, so to convert it to moles we use the molar mass. For this we go to the periodic table and see that the values for each element are:

Na (sodium): 22,99 g/mol

H (hydrogen): 1 g/mol

P (phosphorus): 25,81 g/mol

So we calculate the moles of each element as follows:

And as we see, for every 0.833 moles of Na we have the same number of moles of P, so the ratio of these elements in the molecule is 1 to 1.

As for the hydrogen:

So the ratio Na to H is 1 to 2.

Now we can write the empirical formula as follows=

NOTES TO TAKE DOWN:

Apparent brightness is a human measurement, and it would change for each star if the measurement were taken from another location. The more precise counterpart of apparent brightness is called absolute brightness (or absolute magnitude) and is the measure of the luminosity of a star, but on a common scale.

ANSWER:

Absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

In the context of physics or mechanics, equilibrium refers to a state of balance or stability where opposing forces or processes are in perfect balance. There are two types of equilibrium: static equilibrium and dynamic equilibrium.

Static equilibrium: This occurs when an object is at rest or completely motionless. In static equilibrium, the forces acting on the object are balanced, resulting in zero net force and zero acceleration. An example of static equilibrium is a book sitting on a table. Dynamic equilibrium: This occurs when an object or system is moving at a constant velocity, with no changes in speed or direction. In dynamic equilibrium, the opposing forces or processes are still present, but they are balanced, resulting in a state of continuous motion without acceleration. An example of dynamic equilibrium is a car moving at a constant speed on a straight road.

Learn more about equilibrium here:

https://brainly.com/question/30694482

#SPJ11

Answer:

the atomic number is 52

Explanation:

atomic number = no of electrons present

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.

For more such questions on concentrated visit:

https://brainly.com/question/28564792

#SPJ8

no it cannot I hope I helped

Answer:

Can not

Explanation:

Because both are salts of sodium and hydroxide

The polarity of water results from the unequal sharing of electrons between oxygen and hydrogen atoms. this results in oxygen having a slight negative charge.

Water (H₂O) is a polar molecule that may also act as a polar solvent. Polar means that the positive and negative electrical charges in the element are distributed unevenly.

Water is polar because the molecule has a bent geometry. The hydrogen atoms (positively charged) are on one side of the molecule, while the oxygen (negatively charged) is on the other side. The oxygen atom still has two lone pairs of electrons, which then repels each other when the atom bonds with hydrogen atoms. The repel force bending the O-H bond away from the linear angle.

Learn more about polar molecule at https://brainly.com/question/24775418

#SPJ4