Put the following in order from smallest to largest in terms of atomic radius:

Mg, Cl, Sr, Br



Sr, Mg, Br, Cl


Mg, Sr, Cl, Br


Br, Cl, Sr, Mg


Cl, Br, Mg, Sr

Answer:

litre.50000665432158900643212lo

The label "0.2 M KNO3" indicates that the solution contains potassium nitrate (KNO3) at a concentration of 0.2 moles per liter (M).

In chemistry, molarity (M) is a unit of concentration that expresses the number of moles of a solute dissolved in one liter of a solution. A mole is a unit of measurement used to express the amount of a substance, and is defined as the amount of a substance that contains the same number of entities (such as atoms, molecules, or ions) as there are in 12 grams of carbon-12.

So, in this case, a solution with a concentration of 0.2 M KNO3 contains 0.2 moles of KNO3 dissolved in one liter of solution. It is important to note that molarity is temperature-dependent and may change with changes in temperature, so it is important to specify the temperature at which the measurement was taken.

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Answer:

D.

Explanation:

The graph of f(x) is vertically compressed by a factor of 6 and shifted 9 units down

Electrons coming off the cathode in an X-ray machine are focused to hit a small area of the anode called the target.

In an X-ray machine, a cathode emits a stream of electrons, which are accelerated toward the anode. The anode consists of a small area known as the target, which is specifically designed to interact with the high-speed electrons. When the electrons strike the target, they undergo a rapid deceleration, resulting in the production of X-rays.

The target area on the anode is typically made of a high atomic number material, such as tungsten or molybdenum, that is capable of withstanding the high heat generated during the X-ray production process. The small focal spot on the target helps to ensure that the X-rays are emitted from a specific location, allowing for better control and precision in directing the X-ray beam.

In summary, the electrons from the cathode are focused to hit a small area of the anode known as the target, where X-rays are generated through the interaction of the electrons with the target material.

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Two responsible uses of machines are in Agriculture to improve efficiency, productivity, and profitability and in the medical field to diagnose and treat patients. Two irresponsible uses of machines are: Some produce a significant amount of pollution and harmful emissions, and machines are designed for warfare and destruction.

An MRI (Magnetic Resonance Imaging) machine is a medical diagnostic tool that uses a powerful magnetic field, radio waves, and a computer to produce detailed images of internal organs, tissues, and bones in the body. It is a non-invasive and painless procedure that can provide valuable information about various conditions and diseases.

Machines have made agriculture practices easier and more efficient for farmers by increasing productivity, precision, and quality while reducing labor costs and physical strain.

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In the diagnosis of cystic fibrosis caused by gene mutation, the mass of AgCl formed and the mass of \(Cl^-\) remaining are 0.003583g and 0.006203g respectively, and the % of \(Cl^-\) precipitated is 12.5%.

Cystic fibrosis (CF) is a hereditary condition that causes respiratory and gastrointestinal issues. An alteration (mutation) in the gene that produces the cystic fibrosis transmembrane regulator (CFTR) protein causes cystic fibrosis. To be born with CF, a new born must get two copies of the CF gene, one from each parent.

Cystic fibrosis causes thick, sticky mucus to accumulate in the lungs. CF causes recurring lung infections and makes breathing difficult over time. Other organs of the body, like the pancreas, might be affected by Cystic fibrosis, making it difficult to digest meals and maintain a healthy weight.

a) Mass of AgCl precipitate = no. of moles x molecular mass

Mass = 0.025mol/L x 0.001L x 143.32g/mol

Mass = 0.003583g

b) Mass of \(Cl^-\) remaining in solution after precipitation = no. of moles x molecular mass

No. of moles of \(Cl^-\) = 0.2mol/L x 0.001L = 0.0002 mol

No. of moles of \(Ag^+\) = 0.25mol/L x 0.001L = 0.000025 mol

Mass of \(Cl^-\) remaining = (0.0002 – 0.000025) x 35.45

Mass of \(Cl^-\) remaining = 0.006203g

c) % of \(Cl^-\) precipitated = 0.000025 / 0.0002 x 100 = 12.5%

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To obtain a good yield of carboxylic acid when ethanol is oxidized using potassium dichromate (VI) (K₂Cr₂O₇) as an oxidizing agent, specific conditions must be met. The correct combination of these conditions is option (b) I, II, and III.

First, sulfuric acid (H₂SO₄) is added to the reaction mixture to act as a catalyst and provide the necessary acidic medium for the oxidation reaction to occur. This step is crucial as it enables the conversion of ethanol to a carboxylic acid with the help of potassium dichromate.

Second, heating the reaction mixture under reflux is essential to maintain a constant temperature and prevent the loss of volatile compounds. This process ensures that the reaction occurs at a steady pace, maximizing the yield of the carboxylic acid.

Lastly, distilling the product as the oxidizing agent is added allows for the continuous separation and collection of the carboxylic acid. This method prevents the carboxylic acid from undergoing further oxidation or side reactions, preserving the desired product and increasing the overall yield.

By following these three steps, you can successfully obtain a high yield of carboxylic acid when oxidizing ethanol using potassium dichromate (VI).

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Criminal law deals with public safety and well-being. When violations occur, fines and prison sentences are common negative sanctions, while certain states may impose the death penalty for severe offenses.

Criminal law is a branch of law that focuses on offenses against society as a whole, aiming to maintain public safety and well-being. It encompasses a range of actions that are considered crimes, such as theft, assault, murder, and fraud. Violations of criminal law can result in legal consequences, known as negative sanctions.

The most common negative sanctions in criminal law include fines and prison sentences. Fines are monetary penalties imposed on individuals found guilty of committing a crime. The amount of the fine is usually determined based on the severity of the offense. Prison sentences involve the confinement of convicted individuals in correctional facilities for a specified period of time.

In certain jurisdictions or for particularly serious offenses, the death penalty may be imposed as the ultimate negative sanction. However, it's important to note that the death penalty is a contentious and heavily debated practice, and its use varies across different countries and states. Some jurisdictions have abolished the death penalty altogether, while others retain it for specific crimes deemed to warrant such severe punishment.

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Answer: If a dark section of pavement absorbs more of the sun's energy than it reflects, then that section will feel warmer over the course of a sunny day.

Answer: Your answer is a Sea breeze

A sea breeze, much like the majority of weather conditions experienced at the coast, is the result of the contrasting way in which the land and ocean react to changes in temperature

Hope this helps!

Answer:

A sea breeze,

Explanation:

also known as an onshore breeze, occurs because of the differences in air pressure created by the difference in temperature between the ocean or water and the dry land.

Answer:

C. The second equation must be halved

D. The second equation must be reversed

E. The third equation must be halved.

Delta Hrxn= 131.3 kJ

Explanation:

The correct answer is -582 KJ.

What is the enthalpy of reaction?

What is the overall enthalpy of the reaction?

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Explanation:

Eating and digesting cheese pizza is a Chemical Change because it is an irreversible reaction. It can't be undone.

Answer:

1. Steric Hindrance: The size of ligands, metal ions and the coordination number must be considered while determining stability.

2. Charge: Charge balance is important to maintain stability in metal complexes. The overall charge of the complex should be neutral, and the ligands must balance the charge of the metal ion.

3. Chelate Effect: Metal complexes with chelating ligands generally show higher stability due to the formation of a ring structure that enhances the stability of coordination bonds.

4. Solvent: The nature of the solvent and its polarity affect the stability of metal complexes. An appropriate solvent should be chosen to ensure optimum stability of the complex.

5. Acid-Base Equilibria: The acidity or basicity of the ligands affects metal complex stability.

6. Temperature: The stability of metal complexes is also temperature-sensitive. A change in temperature can alter the stability of metal complexes.

7. Presence of Other Ions: The presence of other ions such as salts, counter-ions, or other metal ions can affect metal complex stability.

8. Steric Crowding: The presence of bulky groups in ligands can hinder coordination, leading to decreased stability.

The chemist should use 30 liters of the 20% solution, 20 liters of the 30% solution, and 40 liters of the 60% solution to obtain a mixture of 90 liters containing 40% acid.

Let's denote the number of liters of the 20% solution as x, the number of liters of the 30% solution as y, and the number of liters of the 60% solution as z.

According to the problem, we have the following information:

The total volume of the mixture is 90 liters: x + y + z = 90.

The desired percentage of acid solution in the mixture is 40%: (0.20x + 0.30y + 0.60z) / 90 = 0.40.

The chemist wants to use 2 times as much of the 60% solution as the 30% solution: z = 2y.

Now, we can solve these equations simultaneously to find the values of x, y, and z.

From equation 3, we have z = 2y.

Substituting this into equation 1, we get:

x + y + 2y = 90

x + 3y = 90 (equation 4)

From equation 2, we have:

(0.20x + 0.30y + 0.60z) / 90 = 0.40

Multiplying both sides by 90, we get:

0.20x + 0.30y + 0.60z = 36

0.20x + 0.30y + 0.60(2y) = 36 (since z = 2y)

0.20x + 0.30y + 1.20y = 36

0.20x + 1.50y = 36 (equation 5)

Now, we can solve equations 4 and 5 simultaneously to find the values of x and y.

Multiplying equation 4 by 0.20, we get:

0.20(x + 3y) = 0.20(90)

0.20x + 0.60y = 18

Subtracting this from equation 5, we eliminate x and solve for y:

0.20x + 1.50y - (0.20x + 0.60y) = 36 - 18

0.90y = 18

y = 18 / 0.90

y = 20

Substituting this value of y back into equation 4, we find:

x + 3y = 90

x + 3(20) = 90

x + 60 = 90

x = 90 - 60

x = 30

Since z = 2y, we have:

z = 2(20)

z = 40

Therefore, the chemist should use 30 liters of the 20% solution, 20 liters of the 30% solution, and 40 liters of the 60% solution to obtain a mixture of 90 liters containing 40% acid.

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It is anticipated that as the reaction proceeds the concentration of CV decreases, and the absorbance of the solution is also expected to decrease.

This is because the absorbance of a solution is directly proportional to the concentration of the solution.The concentration of the CV decreases as the reaction proceeds because CV is oxidized by persulfate ions.

This reaction consumes CV and leads to a decrease in its concentration. As the concentration of CV decreases, the absorbance of the solution also decreases.

This is because the amount of light absorbed by the solution is directly proportional to the concentration of the solution.

As the concentration of CV decreases, the solution becomes less concentrated and absorbs less light. Therefore, the absorbance of the solution is also expected to decrease.

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Answer:

No

Explanation:

There is only one Nitrogen on the left side while there are 2 on the right. Also there is zero oxygen on the left side and two on the right. The amounts of hydrgen arent equal to each side either.

Answer:

It's compound? It's chemical compound would be represented my letters or numbers

Answer:

The letters in a chemical formula are the symbols for the specific elements. So for example, H means hydrogen, O means oxygen, S means sul fur, C u means copper, F means fluorine, Fe means iron and Au means gold.

Explanation:

Yea, Hope I helped

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Answer:

5.9 × 10² kJ

Explanation:

When carbon disulfide, CS₂, forms from its elements, heat is absorbed. The corresponding value for the standard enthalpy of formation of carbon disulfide is 117.36 kJ/mol. The thermochemical equation that represents this process is:

C(graphite) + 2 S(s, rhombic) ⇒ CS₂(g)   ΔH°f = 117.36 kJ/mol

117.36 kJ of heat are absorbed when 1 mole of CS₂ is formed. The amount of heat absorbed when 5.0 moles of CS₂ are formed is:

5.0 mol × 117.36 kJ/mol = 5.9 × 10² kJ

Explanation:

The molarity or molar concentration is can be calculated by dividing the number of moles of solute by the volume of solution in L.

molarity = moles of solute/volume of solution in L

We want to prepare 6.7 L of a 1.2 M solution of CuF₂. We can find the number of moles of CuF₂ that we have to dissolve in the solution.

molarity = 1.2 M

volume of solution in L = 6.7 L

molarity = moles of CuF₂/(volume of solution in L)

moles of CuF₂ = molarity * volume of solution in L

The volume of the solution of NaOH required is obtained as 400 mL.

The term titration has to do with the procedure by which an acid reacts with a base to give salt and water only. The process of titration is a volumetric process.

We can see that the reaction shows that  2 moles NaOH reacts with 1 mole of the acid.

Number of moles of  acid= 2.0 mol/L x 0.1 L = 0.2 moles

Number of moles of base required = 2 x 0.2 = 0.4 moles

Number of moles of NaOH that we need = (x L)(1.0 mol/L) = 0.4 moles

Volume of NaOH that we need =  0.4 L or 400 mL

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Missing parts;

How many ml of 1.0 M NaOH solution are needed to neutralize 100 ml of 2.0 M H2SO4 solution

The H₂SO₄ (sulfuric acid) and HSO₄⁻ (hydrogen sulfate or bisulfate ion) are considered a conjugate acid-base pair. The correct answer is yes.

H₂SO₄ (sulfuric acid) and  HSO₄⁻ (hydrogen sulfate or bisulfate ion) form a conjugate acid-base pair. In the context of the Bronsted-Lowry theory, an acid donates a proton (H+), while a base accepts a proton. When H2SO4 donates a proton, it becomes  HSO₄⁻.

Conversely, when  HSO₄⁻ accepts a proton, it reforms H₂SO₄. They are interconnected through the transfer of a proton, thus qualifying as a conjugate acid-base pair. This relationship allows for the reversible conversion between the two species through proton transfer reactions. Therefore, yes, H₂SO₄ and HSO₄⁻ are considered a conjugate acid-base pair.

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Answer:

which subjet is this math science or history

Explanation:

The nomenclature of ionic compounds is given by:

1. Positive is written first.  And if the metal atom has various oxidation states then its oxidation state is to be mentioned in brackets with help of roman numbers

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

1.)  : Calcium chloride  (Correct)

In the given compound, calcium has oxidation state of +2 and chlorine has oxidation state of -1.The name is correct.

2.)  : Copper (II) oxide   (Incorrect)

In the given compound,copper has the oxidation state of +1 and oxygen has oxidation state of -2.So ,the correct name will be Copper (I) oxide.

3.)  : Lead (II) sulfide   (Incorrect)

In the given compound, lead has the oxidation state of +4 and sulfur has oxidation state of -2. So ,the correct name will be Lead (IV) sulfide.

Explanation:

Our environment is very important to us because it is where we live and share resources with other species. ... Environmental science enlightens us on how to conserve our environment in the face of increasing human population growth and anthropogenic activities that degrade natural resources and ecosystems.

Answer:

The indroduction of lizards in this marshy habitat may lead to severe alterations of its own ecosystem. Since the lizards and frogs are both species who feed on small insects, the insect population might begin to decrease around the area. Furthermore, if insects have lessened in the marsh, that means food for the lizard as well as for the frog. In an extreme scenario, unless the two species adapt to these new conditions, their population may rapidly decrease.

Answer:

Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a  commensal-host  relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on these insects. The introduction of lizards may lead to  competition between lizards and frogs for food .

The heat of vaporization of benzene is 15.2 kJ/g.

In order to determine the heat of vaporization of benzene, we need to use the formula:

Heat of vaporization = heat required/mass of sample converted

The heat required to convert a 9 g sample of aldehyde from the liquid to gas phase is 5.2 kJ.

Therefore, the heat required to convert an 18 g sample of aldehyde from the liquid to gas phase is:Heat required = 5.2 kJ x (18 g/9 g) = 10.4 kJ

Now, we can use the heat required to convert a 26.4 g sample of benzene from the liquid to gas phase to determine the heat of vaporization of benzene:

Heat of vaporization = 26.4 g x (10.4 kJ/18 g) = 15.2 kJ/g

Therefore, the heat of vaporization of benzene is 15.2 kJ/g.

Explanation:

Benzene (C6H6) has a heat of vaporization of 30.8 kJ/mol. Its molecular weight is 78.11 g/mol.

So, for benzene: Heat of vaporization = (30.8 kJ/mol) / (78.11 g/mol)

Heat of vaporization = 0.394 kJ/g

The actual heat of vaporization of benzene is 38.8 kJ/mol or 0.496 kJ/g.

The deviation in the measured value can be due to some experimental errors or impurities in the sample used.

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Rb-91 is the most probable nuclide among the given choices to go through beta rot.

Among the given nuclides, the most probable nuclide to go through beta rot is Rb-91 (rubidium-91). The emission of an electron (-) or positron (+) is accompanied by the transformation of a neutron into a proton or vice versa during beta decay. The nucleus's atomic number changes during this process, but the mass number stays the same or slightly changes.

Rb-91 has 37 protons and 54 neutrons. It's anything but a steady isotope and goes through beta rot to become Sr-91 (strontium-91). A neutron in the nucleus of Rb-91 is transformed into a proton during beta decay, increasing the atomic number by one. Sr-91, the resulting nucleus, contains 53 neutrons and 38 protons.

Thusly, Rb-91 is the most probable nuclide among the given choices to go through beta rot.

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