Calculate the molar solubility (s) for a slightly soluble salt AX3. (A = cation and X - anion of the salt). The Ksp for the salt is 2.7 x 108 Answer: Calculate the molar solubility (s) for the same slightly soluble salt AX in a 0.20 M solution of KX; (assume KX, is a soluble potassium salt of the anion X). The Ksp for the salt is 2.7 x 10-8 Answer

The amount of solute will dissolve in 125ml of the solution : 36.53g.

Given:

Molarity = 5M

MM of NaCl = 58.44

Solution:

To find the amount of solute in 125 mL of NaCl, we need to find the amount of solute, the will dissolve in 1 liter.

Molarity = Mass concentration( g/L) / Molar Mass

then, Mass concentration of NaCl = Molarity * Molar Mass

= 5 * 58.44

= 292.2g

So, the 292.2g of solute will dissolve in NaCl 1L.

Hence, X gram of NaCl will dissolve in 0.125L of the solution:

= Xg of NaCl = 292.2 * 0.125

= 36.525g

Thus, the amount of solute will dissolve in 125L of the solution : 36.525g

What do you mean by solute?

A solute is defined as the substance that is dissolved in a solution. For solutions of fluids, the solvent is present in greater amount than the solute. Concentration is a measurement of the amount of solute present in a chemical solution, with respect to the amount of solvent.

Examples of Solutes

Usually, a solute is a solid that is dissolved into a liquid. An everyday example of a solute is salt in water. Salt is the solute that dissolves in water, the solvent, to form a saline solution.

On the other hand, water vapor is considered a solute in air because nitrogen and oxygen are present in much larger concentration levels in the gas.

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The number of grams of solute dissolved in 125.0 mL of 5.00 M NaCl is 35.53 g

What is dissolved?

Dissolved refers to a solid substance that has been broken down into individual molecules or ions in a solution. This can occur through a process known as dissolution, whereby a solid is mixed with a liquid, resulting in the solid being dispersed within the liquid. Dissolution can be caused by physical or chemical processes, such as heating or the addition of an acid or base. Dissolved substances can be measured using a variety of techniques, including spectroscopy and chromatography. The amount of dissolved material present in a solution is often referred to as its concentration.

The number of grams of solute dissolved in 125.0 mL of 5.00 M NaCl can be calculated using the following equation:
grams of solute = (concentration of solution in moles/L) x (volume of solution in L) x (molar mass of solute in g/mol).
Therefore, the number of grams of solute dissolved in 125.0 mL of 5.00 M NaCl is:
grams of solute = (5.00 mol/L) x (0.125 L) x (58.44 g/mol)
grams of solute = 35.53 g

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Answer:

0.57 molecules

Explanation:

There are 8 possible dichloronaphthalenes. The correct answer is E) 8.

To determine this, we need to consider the molecular formula of dichloronaphthalene: C10H6Cl2. Since there are 10 carbon atoms, this means that each carbon atom can be attached to a maximum of two chlorine atoms.

The basic foundation of life on Earth is carbon. The Earth's temperature is regulated by carbon molecules, which also make up the food we eat and provide the energy that powers our global economy. Rocks and sediments contain the majority of the carbon on Earth.This results in a maximum of 8 different dichloronaphthalene molecules.

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The rate of decomposition of XO2 after 1 hour : \(\tt A=A_o.e^{-1.08}\)

Given

the half-life 38.6 min

time of decomposition = 1 hour

Required

the rate of decomposition

Solution

First-order reaction :

\(\tt A=A_o.e^{-kt}\)

the half life=t1/2 :

\(\tt t\frac{1}{2}=\dfrac{ln~2}{k}\)

so the rate constant (k) :

\(\tt k=\dfrac{ln~2}{38.6}=0.018\)

The rate after 1 hour=60 min :

\(\tt A=A_o.e^{-0.018\times 60}\\\\A=A_o.e^{-1.08}\)

Answer:

Carbon monoxide

Explanation:

Carbon dioxide and carbon monoxide have the same number of carbon atoms.

Mark Brainliest

Answer:

The correct answer is A

Explanation:

A radio telescope is used to detect, collect and focus radio waves from distant objects in the sky or space. While a compound telescope, by design, can both refract and reflect waves. A reflection telescope uses curved mirrors to reflect light to form an image. A refraction telescope forms an image using a lens as its objective.

From the above definitions, it can be deduced that option A is the correct answer.

Answer:

11.9

Explanation:

ph=poh-14 and vice versa. Always subtract by 14

Answer: Carbon,Hydrogen, Chlorine

Explanation:

C=Carbon

H=Hydrogen

Cl=Chlorine

Hope this helps :)

Answer:

Methane

Explanation:

It is methane because, it comes from natural sources.

Answer:

I think it is more that one is correct, so sorry if I'm wrong, if it isn't, it is one of the electron bonding ones

Answer:

Answer:

Potassium  (K)

Sodium  (Na)    

Calcium  (Ca)

Magnesium (Mg)  

Aluminium  (Al)

Iron  (Fe)  

Lead  (Pb)

Copper  (Cu)  

Silver  (Ag)

Gold  (Au)

answer

When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state. An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle

The molar solubility of sodium stearate in pure water is 0.00163 mol/L, and the solubility is 0.5 g/L.

To calculate the molar solubility and solubility of sodium stearate (C17H35COONA) in pure water, we need to consider the balanced equation for its dissolution and use the given molecular formula and molar mass.

First, let's write the balanced equation for the dissolution of sodium stearate in water:

C17H35COONA(s) ⇌ C17H35COO−(aq) + Na+(aq)

The molar solubility is defined as the number of moles of solute (sodium stearate) that dissolve per liter of solvent (water). To calculate it, we need to determine the concentration of the sodium stearate ions in the saturated solution.

The molecular formula of sodium stearate (C17H35COONA) indicates that for every molecule that dissolves, one C17H35COO− ion and one Na+ ion are produced. Therefore, the concentration of both ions will be the same in the saturated solution.

To find the molar solubility, we need to calculate the concentration of either the C17H35COO− ion or the Na+ ion. Let's use the C17H35COO− ion.

The molar mass of sodium stearate (C17H35COONA) is 306.44 g/mol.

Now, we can calculate the molar solubility:
Molar solubility = (mass of sodium stearate / molar mass of sodium stearate) / volume of water

Since we are working with pure water, the volume is 1 liter (1000 mL).

To find the solubility in grams per liter (g/L), we multiply the molar solubility by the molar mass of sodium stearate.

Example calculation:
If the mass of sodium stearate dissolved is 0.5 grams, the molar solubility would be:
Molar solubility = (0.5 g / 306.44 g/mol) / 1 L = 0.00163 mol/L
Solubility = 0.00163 mol/L * 306.44 g/mol = 0.5 g/L

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For the reactions shown;
a) MgCl2 + H2SO4 → MgSO4 + 2 HCl

c) 6K + Al2O3 → 3K2O + 2Al

d) 2H2O ----> 2H2 + O2

e) 2C4H10 + 13O2 → 8CO2 + 10H2O

f) will not proceed

g) Will proceed

h) Will proceed

i) Will not proceed

j) Will not proceed

A balanced chemical reaction is a chemical equation that represents equal numbers of atoms of each element involved in the reaction, ensuring that the same amount of matter is present before and after the reaction takes place. The coefficients in the equation indicate the relative proportions of reactants and products.

In the case of the replacement reactions, we know that the substance that is higher in the electrochemical series will replace the substance that is lower in the series as shown.

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Answer:

c

Explanation:

The new volume of the balloon when heated to 78 oC is approximately 2.89 L, assuming no change in pressure.

The volume of a gas is directly proportional to its temperature when pressure remains constant. This relationship is described by Charles's Law.

To find the new volume of the balloon after it is heated to 78 oC, we can use the formula:

(V1 / T1) = (V2 / T2)

where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume, and T2 is the final temperature.

Given:
Initial volume, V1 = 2.44 L
Initial temperature, T1 = 23 oC = 23 + 273.15 K = 296.15 K
Final temperature, T2 = 78 oC = 78 + 273.15 K = 351.15 K

We can plug these values into the formula and solve for V2:

(2.44 L / 296.15 K) = (V2 / 351.15 K)

Cross-multiplying:

(2.44 L) * (351.15 K) = (296.15 K) * (V2)

V2 = (2.44 L) * (351.15 K) / (296.15 K)

Calculating:

V2 ≈ 2.89 L

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The final volume of the gas is  134 L.

We know that when a gas expands, the gas does work and as such the work done would have a negative sign. Recall that  the reason why we say that work is done is because the gas would exert some force on the walls of the container as its particle bombard the walls of the container more frequently.

Now we know that;

W = PΔV

W = work done by the gas

P = pressure of the gas

V = volume of the gas

We have here;

W = 138.0 J

P =  783 Torr or 1.03 atm

V 1 = 65.9 mL or 0.0659 L

V2 = ??

Hence;

ΔV = W/P

ΔV = 138.0 J/1.03 atm

ΔV = 133.98 L

V2 = 133.98 L + 0.0659 L

V2 = 134 L

The final volume of the gas is  134 L.

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The number of cells that the domain Eukarya has is highly variable, ranging from a single cell in some unicellular eukaryotes to trillions of cells in some multicellular organisms like humans.

Domain Eukarya is one of the three domains of life, the others being Bacteria and Archaea. It includes all organisms that have cells with a nucleus and other membrane-bound organelles. These organisms are eukaryotes and are known to have a vast diversity of cell types and structures.
The number of cells that a eukaryotic organism possesses varies depending on the species. Some eukaryotes are unicellular, meaning they have only one cell, while others are multicellular, meaning they have multiple cells. For instance, some unicellular eukaryotes are yeast, amoeba, and paramecium, while multicellular eukaryotes include animals, plants, and fungi.
It is difficult to determine the exact number of cells in the entire domain Eukarya, as there are millions of species that belong to this domain, and the number of cells in each species is different. However, it is known that eukaryotes are generally larger and more complex than prokaryotes, which are the organisms in the domains Bacteria and Archaea.
In conclusion, the number of cells that the domain Eukarya has is highly variable, ranging from a single cell in some unicellular eukaryotes to trillions of cells in some multicellular organisms like humans.

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1. The fold difference in [H+] concentration when the pH of a solution changes from 1 to 6 is 100,000.

The pH scale is a logarithmic scale that measures the concentration of hydrogen ions ([H+]) in a solution. Each unit change in pH represents a tenfold difference in [H+] concentration.

To calculate the fold difference in [H+] concentration, we can use the formula:

Fold difference = 10^(pH2 - pH1)

Given:

pH1 = 1

pH2 = 6

Fold difference = 10^(6 - 1) = 10^5 = 100,000

Therefore, the fold difference in [H+] concentration when the pH of a solution changes from 1 to 6 is 100,000.

2. The fold difference in [OH-] concentration when the pH of a solution changes from 6 to 9 is 1,000.

In a neutral solution, the concentration of hydroxide ions ([OH-]) is equal to the concentration of hydrogen ions ([H+]). Therefore, a change in pH of 3 units corresponds to a fold difference of 1,000 in [OH-] concentration.

Fold difference = 10^(pH2 - pH1)

Given:

pH1 = 6

pH2 = 9

Fold difference = 10^(9 - 6) = 10^3 = 1,000

Therefore, the fold difference in [OH-] concentration when the pH of a solution changes from 6 to 9 is 1,000.

3. The fold difference in [H+] concentration when the pH of a solution changes from 9 to 2 is 1,000,000,000.

Using the same formula as above:

Fold difference = 10^(pH2 - pH1)

Given:

pH1 = 9

pH2 = 2

Fold difference = 10^(2 - 9) = 10^-7 = 1/10^7 = 1,000,000,000

Therefore, the fold difference in [H+] concentration when the pH of a solution changes from 9 to 2 is 1,000,000,000.

4. The fold difference in [OH-] concentration when the pH of a solution changes from 5 to 1 is 100.

Again, using the same formula:

Fold difference = 10^(pH2 - pH1)

Given:

pH1 = 5

pH2 = 1

Fold difference = 10^(1 - 5) = 10^-4 = 1/10^4 = 1/10,000 = 0.0001

Therefore, the fold difference in [OH-] concentration when the pH of a solution changes from 5 to 1 is 0.0001 or 1/10,000.

In summary, the fold difference in [H+] concentration and [OH-] concentration can be determined based on the change in pH using logarithmic calculations. When the pH changes by one unit, there is a tenfold difference in concentration. The fold difference depends on the difference in pH values, and it can range from 1 to 1,000,000,000, as shown in the four practice problems above.

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Answer:

False. Humans are the only reason the earth is polluted

hope this helps :)

The balanced net reactiion for the following half cells will be

Sn + Cr²⁺   --->  Sn²⁺  +  Cr

A half cell is one of the two electrodes of an electrochemical cell.

An electrochemical cell comprises two half cells, where every half cell contains an electrode and an electrolyte.

A salt bridge or direct contact is needed to connect two half cells.

The balanced net reactiion for the given half cells will be

Sn + Cr²⁺   --->  Sn²⁺  +  Cr

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Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature.

Solar radiation, temperature, and rainfall are the three main climatic elements that affect how quickly plants grow, develop, and produce food. The buildup of dry materials must occur at the ideal temperature. The following are some of the ideal circumstances for strong plant growth: Air temperature: 24 °C Day/ 19 °C Day (75F/65F) H2O temperature: cold at 26 °C, hot at 24 °C, not to exceed 25 °C. Minimum of 50 and no more than 70% relative humidity These fundamental resources for the food-producing industry, according to Perrin, include land, water, and other natural resources as well as important aspects like climate and ecological resilience. Environmental elements include air, water, soil, climate, native plants, and landforms. By definition, environmental factors have an impact on daily life and are a significant contributor to the disparities in health that exist between different geographic regions.

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According to safe coping with practices, workforce shortage, negative managing techniques, repetitive tasks, and lack of time are all personnel factors.

Safe affected person handling and mobility involves the use of assistive devices to ensure that sufferers can be mobilized safely and that care companies keep away from performing high-risk guide patient managing tasks. Using the devices reduces a care provider's risk of harm and improves the security and great of affected person care.

The feature that a peptide contains out is established on the sorts of amino acids involved in the chain and their sequence, as well as the specific structure of the peptide.

Peptides frequently act as hormones and as a result represent biologic messengers carrying records from one tissue through the blood to another.

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The 15 kg block require more work to raise by 4 meter compare to  20 kg blocks .

The free body diagram is attached below,

We know that,  Weight \(W=m*g\)

where m is mass of object and g is gravitational acceleration.

Value of  \(g=9.8m/s^{2}\)

So that, weight is depend on mass of object.

And , \(workdone=force*distance\)

Work done require to raise 15kg block by 4 m is,

                 \(W=15*4*g=60g\)

Work done require to raise 20kg block by 2 m is,

               \(W=20*2*g=40g\)

Hence, The 15 kg block require more work to raise by 4 meter compare to  20 kg blocks .

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The gas-phase atoms in their ground states that are diamagnetic include (II) Zn.

In order to determine which gas-phase atoms in their ground states are diamagnetic, we need to first understand what diamagnetic means. Diamagnetic materials are those that are not attracted to a magnetic field. In other words, diamagnetic atoms have all their electrons paired up in their atomic orbitals, resulting in a net magnetic moment of zero.

To determine if an element is diamagnetic, we can look at its electron configuration.

I. Fe (Iron) has an atomic number of 26. Its electron configuration is [Ar] 4s²3d⁶. Since it has unpaired electrons in the 3d orbital, it is not diamagnetic.

II. Zn (Zinc) has an atomic number of 30. Its electron configuration is [Ar] 4s²3d¹⁰. All the electrons in the 3d and 4s orbitals are paired, making Zn diamagnetic.

In summary, gas-phase Zn atoms in their ground states are diamagnetic due to their fully paired electrons in the atomic orbitals. Fe, on the other hand, is not diamagnetic due to the presence of unpaired electrons in its orbitals.

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Answer:

Explanation:

Knowing what things are made of, especially in the case of a mixture whose constituents still retain there chemical properties, assists in knowing the beneficial and harmful effects of those things.

For a example, a body cream/lotion (a mixture) that contains hydroquinone will give an individual the idea that the body cream is a lightening cream; as hydroquinone is a depigmenting agent that reduces the production of melanin thereby leading to the lightening of the skin.

Another relevant example is the hand sanitizer that is recommended for use of cleaning of hands in order to rid the hands off of corona virus. The recommended hand sanitizer should be made of at least 60% ethanol for effective use (which dissolves the virus). Knowing the components of a sanitizer to be used against the virus will assist an individual at a store make informed decision about purchase.

If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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Using this formula, we can calculate the confidence interval once we have the sample data, without the sample data, it is not possible to provide an accurate confidence interval estimate.

To construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system, we would need the sample data, specifically the number of cell phone users and the number of users who developed cancer. Without the sample data, it is not possible to provide an accurate confidence interval estimate.

However, if we assume that we have the necessary sample data, we can proceed with the calculation. The formula for calculating a confidence interval for a proportion is:

Confidence interval

\(=�^±�×�^(1−�^)�Confidence interval= p^​ ±z× np^​ (1− p^​ )​ ​ where:�^p^​\)

 is the sample proportion (number of users with cancer divided by the total number of cell phone users).

\(�\)

z is the z-score corresponding to the desired confidence level (90% confidence level corresponds to a z-score of approximately 1.645).

\(�\)

n is the sample size (total number of cell phone users).

Using this formula, we can calculate the confidence interval once we have the sample data.

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