what is the ion-product constant for water (kw) give the definition the expression and the value

Answers

Answer 1
The ion product if H2O is the product of [H3O+] (or [H+] depending on your book) and [OH-] at a specific temperature, and this product is derived from the equilibrium constant for the reaction of self-ionization of H2O. The expression is as follows
Kw = [H3O+][OH-]
(Or Kw = [H+][OH-] depending on your book)

And the value of Kw is 10^-14 at 25 °C

Hope this helps

Related Questions

4. Which of the following types of radiation is a form of ionizing radiation from
outer space? bong
A. cosmic radiation
C. gamma rays
B. visible light
D. X-radiation

Answers

C. gamma rays

Because examples of ionizing radiation include alpha particles, beta particles, gamma rays, x rays, and galactic cosmic radiation from space.

24. Explain why a saturated solution is not necessarily a concentrated solution.

Answers

Answer:

A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.

determine the molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.228.

Answers

The molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.228 is 9.45*10-3 M.

Mole fraction = 0.228 = moles water/total moles

Let total moles = 1

0.228 = x/1

X =0.228

Molality = moles of solute/mass of solvent

M = 0.228/(1-0.228)*32= 9.45*10-3 M

Molality (m), or molal awareness, is the amount of a substance dissolved in a sure mass of solvent. it's far defined because of the moles of a solute in step with kilograms of a solvent. The molality of a solution is identical to the moles of solute divided via the mass of solvent in kilograms, at the same time as the molarity of an answer is equal to the moles of solute divided by way of the extent of solution in liters.

Molality is a measure of the range of moles of solute in an answer corresponding to 1 kg or a thousand g of solvent. This contrasts with the definition of molarity that's based totally on a precise quantity of solution. A normally used unit for molality in chemistry is mol/kg. The image for molarity is M or moles/liter. Chemists also use square brackets to signify a reference to the molarity of a substance.

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what sea animals have moveable spines that they use for protection

Answers

Answer:

sea urchins

Explanation:

Answer:

sea urchins

Explanation:

i took the test

what is the maximum bond order that is possible for a bond between elements in the first two rows of the periodic table?

Answers

The Mo and W diatoms symbolize the greatest bond order attained between two atoms in the periodic table, which is six.

Can a bond order have more than three bonds?

Bond order is the number of electron bonding pairs that exist between two atoms. A quadruple bond is a form of chemical relationship that involves eight electrons between two atoms. This bond is a variation on the more common double and triple bonds.

The number of bonds that an atom may make is frequently predicted by the number of electrons required to achieve an octet (eight valence electrons); this is notably true .

When three pairs of electrons come together, they create a triple bond.

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show by calculation which of the metals in problem 25 will react with nitric acid to form no (standard concentration)

Answers

Metals zinc and iron will react with nitric acid to form NO

To determine which metal in problem 25 will react with nitric acid to form NO (standard concentration), we need to look at the reduction potentials of each metal.

The reduction potential is a measure of a metal's tendency to lose electrons and undergo reduction.

In this case, we can use the Nernst equation to calculate the reduction potential for each metal:

E = E° - (RT/nF)ln([NO-]/[NO])

Where:
- E is the reduction potential
- E° is the standard reduction potential
- R is the gas constant (8.314 J/mol*K)
- T is the temperature (in Kelvin)
- n is the number of electrons transferred
- F is the Faraday constant (96,485 C/mol)
- [NO-] and [NO] are the concentrations of nitric oxide and nitric acid, respectively.

We know that NO (standard concentration) is formed when the reduction potential is greater than or equal to 0.80 V.

After calculating the reduction potential for each metal using the Nernst equation, we find that zinc and iron have reduction potentials greater than 0.80 V. Therefore, zinc and iron will react with nitric acid to form NO (standard concentration).

In summary, by calculating the reduction potentials of each metal in problem 25 using the Nernst equation, we can determine that zinc and iron will react with nitric acid to form NO (standard concentration).

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Which of the following metals (M) will form an ionic compound with nitrogen with the general formula M3N2?

a
lithium (Li)
b
sodium (Na)
c
aluminum (Al)
d
beryllium (Be)

Answers

I thinks it’s D since Be has a charge of 2+ and you are given the formula of M3N2. When you swap and drop the charge of N (3-) and the charge of Be (2+) you get M3N2

Beryllium (Be) will form an ionic compound with nitrogen with the general formula M\(_3\)N\(_2\). Therefore, the correct option is option D.

What is metal?

Metal refers to any of a class of substances that have excellent electrical and thermal conductivity, malleability, flexibility, or light reflection. Metals account for over 75% of any and all chemical elements currently known.

Aluminum, iron, salt, potassium, and magnesium are the most abundant elements in the Earth's crust. Most metals can be found in ores, while some, such as copper, gold, platinum, even silver, are frequently found in their free state because they do cannot easily react with other elements. Beryllium (Be) will form an ionic compound with nitrogen with the general formula M\(_3\)N\(_2\).

Therefore, the correct option is option D.

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Suppose that money is deposited daily into a savings account at an annual rate of $20,000. If the account pays 5% interest compounded continuously, estimate the balance in the account at the end of 6 years. CAS The approximate balance in the account is 5 (Round to the nearest dollar as needed)

Answers

The approximate balance in the account at the end of 6 years is $159,074. Rounded to the nearest dollar, it is $159,074.

Assuming that the annual rate of $20,000 is deposited at the beginning of each year, the total amount deposited over 6 years would be $120,000. With continuous compounding at 5% interest rate, the formula to calculate the balance in the account after 6 years is:
A = Pe^(rt)
Where A is the balance, P is the principal (amount deposited), e is the mathematical constant approximately equal to 2.71828, r is the interest rate in decimal form, and t is the time in years.
Plugging in the values, we get:
A = $120,000e^(0.05*6)
A = $159,073.51
Therefore, the approximate balance in the account at the end of 6 years is $159,074. Rounded to the nearest dollar, it is $159,074.

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5.
Primary succession occurs when pioneer species move into an area that has no plants. Which organisms are common pioneer species?
A Conifer trees and tall grasses with roots that loosen the soil
B. O Mosses and lichens that can grow on rocky surfaces
c. Grasses and weeds that arrive as seeds carried by the wind and then germinate in rich soil
D. O Vines and shrubs that help prevent the erosion of shallow soil
No

Answers

Answer:

C

Explanation:

Primary succession occurs when pioneer species move into an area that has no plants. This happens because of Mosses and lichens that can grow on rocky surfaces and the correct option is option B.

What is Primary Succession?

Primary succession refers to the establishment of a community in an uninhabited area such as rocks.

It is a type of ecological succession (the evolution of a biological community’s ecological structure) in which plants and animals first colonize a barren, lifeless habitat.

Species that arrive first in the newly created environment are called pioneer species, and through their interactions they build a simple initial biological community.

Therefore, Primary succession occurs when pioneer species move into an area that has no plants. This happens because of Mosses and lichens that can grow on rocky surfaces and the correct option is option B.

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URGENT! Please help! Hi, I have to do a titration lab report using the Royal Society of Chemistry online titration lab. Please help me answer the following questions using the observation table I think?

URGENT! Please help! Hi, I have to do a titration lab report using the Royal Society of Chemistry online
URGENT! Please help! Hi, I have to do a titration lab report using the Royal Society of Chemistry online

Answers

Answer:

I'm sorry, but I cannot see the observations or the data table you mentioned in your question. However, I can still provide you with some general guidance on how to approach the calculations and answer the questions based on the given information.

4. To calculate the concentration of the NaOH solution, you need to know the mass of NaOH used and the volume of the solution. The formula to calculate concentration is:

Concentration (in mol/L) = (Mass of NaOH (in grams) / molar mass of NaOH) / Volume of solution (in L)

Make sure to convert the mass of NaOH to moles by dividing it by the molar mass of NaOH. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H).

5. The balanced equation for the neutralization reaction between NaOH and HCl is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

(aq) represents an aqueous solution, and (l) represents a liquid.

6a. To calculate the average concentration of HCl in the sample from site B, you need to know the volumes and concentrations of the NaOH and HCl solutions used in the titration. Use the formula:

Concentration of HCl (in mol/L) = (Volume of NaOH solution (in L) * Concentration of NaOH (in mol/L)) / Volume of HCl solution (in L)

Multiply the volume of NaOH solution used by its concentration to find the amount of NaOH used. Then, divide this amount by the volume of HCl solution used to find the concentration of HCl.

6b. To determine the pH of the water at site B, you need to know the concentration of HCl from the previous calculation. The pH can be calculated using the formula:

pH = -log10[H+]

Since HCl is a strong acid, it dissociates completely into H+ ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl. Take the negative logarithm (base 10) of the H+ concentration to find the pH.

To check if the water is safe, compare the calculated pH value to the range provided (pH 4.5-7.5). If the pH falls within this range, the water is considered safe for plant and animal reproduction in an aquatic environment.

6c. Use a similar calculation as in 6a to determine the average concentration of HCl in the sample from site C.

6d. Use the concentration of HCl from 6c to calculate the pH using the formula in 6b. Follow the same procedure to check if the water is safe based on the pH range.

7. To find the most current pH value for the Grand River, you can search for the latest data from reliable sources such as environmental agencies, research institutions, or government websites. Compare this pH value to the pH values obtained in the experiment to assess the difference between them.

Remember, without the specific data and observations, the calculations and comparisons provided here are only general guidelines. It's important to use the actual data from your experiment to obtain accurate results and conclusions.

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Which is a type of lipid?
A. Disaccharide
B. Triglyceride
C. Nucleotide
D. Enzyme
SUBMI

Answers

Answer:

B. triglyceride

Explanation:

Answer:

triglyceride becauseit is a fatty acid

How can we take care of our circulatory? Or what are diseases which can affect it? Answer in your own words) please don’t copy and paste will know ty

Answers

Answer:

There are many ways we can take care of our circulatory system, such as exercising! If people exercise more, they have: a normal blood pressure, less risk of getting diabetes. Working out even improves your muscles' ability to pull oxygen in and out of the blood. Another way to take care of the circulatory system is to not vape. Vapes have chemicals, such as nicotine, that make your arteries stiff. It also causes cholesterol deposits, which can lead to clots forming in your blood vessels. Additionally, the blood vessels can easily rupture.

Heart disease is responsible for a quarter of all deaths in the United States. Heart diseases and strokes happen when you have high blood pressure, or hypertension. More specifically, a stroke happens when the blood supply to the brain is reduced. If you eat foods with high sodium and fat, you're at greater risk of getting heart and cardiovascular diseases. The salt and fat adds excess water to your blood vessels, resulting in abnormal blood pressures.

Explanation:

What type of elements are likely to form ionic bonds and why

Answers

Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion.

Answer:

An ionic bond is formed when a metallic element and a non-metallic element form a compound. Elements form ionic bond to gain more stability.

Some athletes like runners or sprinters may train by attaching a small parachute to their upper body. The parachute opens behind them as they run, resulting in a drag force acting on the athlete. Such athletes would never use this in actual competition, though. Explain how using a parachute like this might make an athlete stronger and why they wouldn’t actually use the parachute during a competition even though they trained with it.

Answers

Answer:

when using would make an athlete stronger when they keep on training with it.

they don't actually use it during a competition because it slows them down and they won't be able to perform well during Competition even though they trained with it

in nature, which chemical binds laci protein to induce transcription of the lac operon?

Answers

The chemical that binds to the laci protein to induce transcription of the lac operon in nature is Allolactose.

Allolactose is a derivative of lactose and acts as an inducer molecule, which binds to the lac repressor protein and causes a conformational change that leads to the dissociation of the repressor from the operator site, thereby allowing RNA polymerase to bind and initiate transcription of the lac operon genes. It is an isomer of lactose and functions as an inducer, binding to the lacI protein and causing it to release from the operator region, allowing transcription to occur.

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Two large, nonconducting plates are suspended 5.61 cm apart. Plate 1 has an area charge density of +92.3μC/m2, and plate 2 has an area charge density of +19.1μC/m2. Treat each plate as an infinite sheet. How much electrostatic energy UE​ is stored in 1.54 cm3 of the space in region A ? UE​= What volume V of the space in region B stores an equal amount of energy?

Answers

Two large, non conducting plates are suspended 5.61 cm apart. Plate 1 has an area charge density of +92.3 μC/m², and plate 2 has an area charge density of +19.1 μC/m².

The electrostatic energy UE​ is stored in 1.54 cm³ of the space in region A is 1.588 x 10⁻⁹ J.

The volume V of the space in region B stores an equal amount of energy is 1.541 x 10⁻⁶ m³.

To calculate the electrostatic energy stored in a given volume of space, we need to determine the electric field and then use it to calculate the energy density. The energy stored in a volume is given by the product of the energy density and the volume.

Distance between the plates (d): 5.61 cm

Charge density of plate 1 (σ₁): +92.3 μC/m²

Charge density of plate 2 (σ₂): +19.1 μC/m²

Volume in region A: 1.54 cm³

First, let's calculate the electric field between the plates:

The electric field between two infinite parallel plates with uniform charge densities is given by:

E = (σ₁ - σ₂) / (2ε₀)

where ε₀ is the permittivity of free space (ε₀ = 8.85 x 10⁻¹² C²/(N m²)).

Substituting the given values, we have:

E = (92.3 x 10⁻⁶ C/m² - 19.1 x 10⁻⁶ C/m²) / (2 x 8.85 x 10⁻¹² C²/(N m²))

E = 5.509 x 10⁶ N/C

Next, let's calculate the electrostatic energy stored in 1.54 cm³ of space in region A:

The energy density (u) is given by:

u = (1/2) ε₀ E²

Substituting the value of E we calculated earlier, we have:

u = (1/2) x 8.85 x 10⁻¹² C²/(N m²) x (5.509 x 10⁶ N/C)²

u = 1.031 x 10⁻³ J/m³

To calculate the energy (UE) stored in the given volume in region A, we multiply the energy density by the volume:

UE = u x V

UE = 1.031 x 10⁻³ J/m³ x 1.54 x 10⁻⁶ m³

UE = 1.588 x 10⁻⁹ J

Therefore, the electrostatic energy stored in 1.54 cm³ of space in region A is 1.588 x 10⁻⁹ J.

To determine the volume (V) in region B that stores an equal amount of energy, we rearrange the equation:

V = UE / u

V = 1.588 x 10⁻⁹ J / 1.031 x 10⁻³ J/m³

V = 1.541 x 10⁻⁶ m³

Therefore, a volume of 1.541 x 10⁻⁶ m³ in region B stores an equal amount of electrostatic energy.

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what is the lewis structure of azidothymidine

Answers

Answer:

Formula C10H13N5O4

he is made with sigma bonds and pi bonds

see the answer in the photo

what is the lewis structure of azidothymidine

the unknown aldehydes/ketones and sodium borohydride are all more soluble in ethyl acetate than methanol. would ethyl acetate therefore be a more suitable solvent for this experiment? why or why not? provide a reaction scheme to help explain your answer:

Answers

Ether acetate would be a suitable solution for the experiment based on the solubility of sodium borohydride and the mysterious aldehydes/ketones.

It is necessary to decrease unidentified aldehydes/ketones with sodium borohydride while submerging the reactants and products.

An unnamed ketone or aldehyde is reduced using sodium borohydride. The resulting alcohol (RCH2OH/R2CHOH), sodium borate (NaBO2), and hydrogen gas are produced when the unknown aldehyde or ketone (RCHO/R2CO) reacts with sodium borohydride (NaBH4). (H2).

Ethyl acetate would be a better solvent overall for the experiment because it would make the reactants and products more soluble.

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Write the formula for the conjugate base for HCN.

Answers

Answer & Procedure

According to the Brønsted-Lowry theory of acid-base, the conjugate base will be CN⁻

Suppoe that you ue 4. 25 g of Iron in the chemical reaction: 2Fe() 3Cu2(aq) rightward arrow 2Fe3(aq) 3Cu(). What i the theoretical yield of Cu(), in gram?

Answers

Theoretical yield of copper is 7.22 g when 4.25g of iron in the chemical reaction.

2Fe(s) + 3Cu2(aq.) ---->  2Fe3(aq.)  + 3Cu (s)

Molar mass of Iron (Fe) is 56g/mole.

Molar mass of copper (cu) is 63.5g/mole.

2 mole ( 2 * 56g/mole) Iron produces = 3 mole ( 3 * 63.5g/mole ) copper

Theoretical yield is the maximum amount of product that could be formed from the given amounts of reactants. The actual yield is the amount of product that is actually formed when the reaction is carried out in the laboratory. The theoretical yield is the amount of product that would be formed from a reaction if it was 100% efficient.

There are 4. 25 g of Iron .so,

4.25 g Iron produces = (3 * 63.5g / 2 * 56 g ) * 4.25 g copper

                                     = 7.22 g copper

Theoretical yield of copper is 7.22g.

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A compound formed from a metal and a non-metal will have which type of bond?

A. Covalent

B. Hydrogen

C. Ionic

D. Atomic

Answers

it's an ionic bond

btw i love your profile picture never understand is one of my favorites

The answer is C
Ionic bond

determine the total mass of KNO3 that settles to the bottom of the beaker when the original solution is cooled to 15 C

Answers

When the original solution of KNO3 is cooled to 15°C, a certain amount of KNO3 will settle to the bottom of the beaker. To determine the total mass of KNO3 that settles, several factors need to be considered, such as the solubility of KNO3 at different temperatures, the initial concentration of KNO3 in the solution, and the volume of the solution. By taking these factors into account, the total mass of KNO3 that settles can be calculated using appropriate equations.

The solubility of KNO3, which is the maximum amount of KNO3 that can dissolve in a given amount of solvent, is temperature-dependent. As the temperature decreases, the solubility of KNO3 decreases. Therefore, when the solution is cooled to 15°C, some of the KNO3 will no longer remain in the dissolved state and will start to precipitate or settle at the bottom of the beaker.

To determine the total mass of KNO3 that settles, several factors need to be considered. Firstly, the initial concentration of KNO3 in the solution is important. It determines the amount of KNO3 present in the solution before cooling. Secondly, the volume of the solution also plays a role, as it affects the total amount of KNO3 that can be dissolved. Finally, the solubility of KNO3 at 15°C needs to be known.

To calculate the mass of KNO3 that settles, the amount of KNO3 remaining in the solution at 15°C needs to be determined. This can be done by subtracting the solubility of KNO3 at 15°C from the initial concentration of KNO3 in the solution. The difference represents the amount of KNO3 that has precipitated and settled. Multiplying this difference by the volume of the solution gives the total mass of KNO3 that settles to the bottom of the beaker when the solution is cooled to 15°C.

It's important to note that this calculation assumes ideal conditions and that other factors, such as impurities or the presence of other substances, may affect the solubility and precipitation of KNO3. Additionally, accurate solubility data at the specific temperature of 15°C should be consulted for precise calculations.

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issued this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your etext. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon.

Answers

The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

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--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

What is the energy of a photon with a 6 micrometer wavelength (1 m = 10^6micrometers)?
O 3 x 10-34 )
O 3 x 10-32
O 3 x 10-20 ]
O 3 x 10-20 j

Answers

The energy of a photon : 3 x 10⁺²⁰

Further explanation

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

\(\large{\boxed{\bold{E\:=\:h\:.\:f}}}\)

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

f = c / λ

c = speed of light

= 3.10⁸

λ = wavelength

Wavelength of photon=λ=6 μm = 6.10⁻⁶ m

\(\tt E=h\times \dfrac{c}{\lambda}\\\\E=6,626.10^{-34}\times \dfrac{3.10^8}{6.10^{-6}}\\\\E=3.3\times 10^{-20}~J\)

the carbon- nuclide radioactively decays by positron emission. write a balanced nuclear chemical equation that describes this process.

Answers

The balanced nuclear chemical equation for the radioactive decay of carbon-11 by positron emission is; ^11C → ^11B + β+ or ^11C -> ^11B + e+ + v.

Where ^11C represents carbon-11, ^11B represents boron-11, β+ represents a positron, e+ represents a positron, and v represents a neutrino.

Carbon-11 (C-11) is a radioactive isotope of carbon with a half-life of about 20 minutes. It undergoes positron emission, which is a type of radioactive decay where a proton in the nucleus is converted into a neutron, and a positron (a particle with the same mass as an electron but with a positive charge) is emitted from the nucleus.

The resulting nucleus has one less proton and one more neutron than the original nucleus, which changes its identity to a new element. In the case of C-11, the positron emission converts one of its six protons into a neutron, resulting in the formation of a stable isotope of boron-11 (B-11).

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why do oxygen and sulfur have similar chemical properties?

I NEED THIS EXPLANATION ASAP PLEASE

Answers

Answer:

Oxygen and sulfur have similar chemical properties because both elements have six electrons in their outermost electron shells. Indeed, both oxygen and sulfur form molecules with two hydrogen atoms: water and hydrogen sulfide

Explanation:


Calculate the number of moles of HCl present in 50.00 cm of 2.00 mol/dm HCI.​

Answers

n=C*Vdm^3 so you will change cm to dm^3. So n=0.1 mole of HCL

How many grams of calcium chloride are needed to produce 15.0 g of potassium chloride?CaCl(aq) + K2CO3(aq)2 KCl(aq) + CaCO3(aq)

How many grams of calcium chloride are needed to produce 15.0 g of potassium chloride?CaCl(aq) + K2CO3(aq)2

Answers

Answer

B. 11.2 grams

Explanation:

Molar mass of CaCl = 110.98 g/mol

Molar mass of KCl = 74.5513 g/mol

From the balanced chemical equation of the reaction given;

1 mole CaCl produced 2 moles KCl.

In grams;

(1 mol x 110.98 g/mol) CaCl produce (2 mol x 74.5513 g/mol) KCl, i.e

110.98 g CaCl produced 149.10236 g KCl,

Therefore, the grams of CaCl needed to produce 15.0 g KCl will be:

\(\text{Grams of CaCl n}eeded\text{ }=\frac{110.98\text{ g }\times15.0\text{ g}}{149.10236\text{ g}}=11.2\text{ grams}\)

Therefore, 11.2 grams of calcium chloride are needed to produce 15.0 g of potassium chloride.

Example of genetic biodiversity

Answers

Answer:

Different breeds of dogs.

Different varieties of rose flower.

Explanation:

one example would be different breeds of dogs

Molecular formula of a certain ionic compound is XY2 and X is a metal. State group to which elements X and Y belong to in the periodic table. plzzz help​

Answers

Answer: m Most likely Group2 metals and Group 17 non-ktta                                                                

Explanation:

A little more information is needed to be certain, but the likely answer is that X belongs to Group 2 and Y belongs to Group 17.  Group 2 metals (Be, Mg, Ca, Sr, Ba, etc.) are all divalent.  They gave rive up 2 electrons each to return to a full shell.  Group 17 elements (e,g, F, Cl, Br, I, etc.) all require 1 electron to reach a full valence shell.  That would make the proportion 1X to 2Y, or XY2.  It is possible that a metal outside of Group 2 would also have a valency of 2.  Iron(II) forms FeCl2, for example.

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