For which salt in each of the following groups will the solubility depend on pH?
a. AgF, AgCl, AgBr
b. Pb(OH)2, PbCl2
c. Sr(NO3)2, Sr(NO2)2 d. Ni(NO3)2, Ni(CN)2

Explanation:

and then name of the other product will be sodium sulphate

Answer:

His total displacement is 80 m northwards

Explanation:

Given;

Mike's first displacement, x₁ = 100 m North

Mike's second displacement, x₂ = 30 m South

Mike's third displacement, x₃ = 10 m North

Let his Northwards direction be positive, and

his Southwards direction be negative

His total displacement = (100 m North) + ( - 30 m South) + (10 m north)

                                     = (100 m + 10m - 30 m)

                                     = 80 m  Northwards

A)The order of increasing electronegativity is: N < P < As < Sb < H.  the order of increasing electronegativity is: H < Si < P < S < Cl , B) the order of increasing electronegativity is: H < Ge < Sr < Cl < Br , C) the order of increasing electronegativity is: H < Si < N < K < Ca. D)the order of increasing electronegativity is: H < Ge < Sr < Cl < Cs.

(a) From left to right across the periodic table, electronegativity generally increases. Among the given elements, nitrogen (N) has the lowest electronegativity, followed by phosphorus (P), arsenic (As), antimony (Sb), and hydrogen (H), which has the highest electronegativity. Therefore, the order of increasing electronegativity is: N < P < As < Sb < H.

(b) Similarly, among the given elements, hydrogen (H) has the lowest electronegativity, followed by silicon (Si), phosphorus (P), sulfur (S), and chlorine (Cl), which has the highest electronegativity. Therefore, the order of increasing electronegativity is: H < Si < P < S < Cl.

(c) In this series, hydrogen (H) has the lowest electronegativity, followed by germanium (Ge), strontium (Sr), chlorine (Cl), and bromine (Br), which has the highest electronegativity. Therefore, the order of increasing electronegativity is: H < Ge < Sr < Cl < Br.

(d) Among the given elements, hydrogen (H) has the lowest electronegativity, followed by silicon (Si), nitrogen (N), potassium (K), and calcium (Ca), which has the highest electronegativity. Therefore, the order of increasing electronegativity is: H < Si < N < K < Ca.

(e) Finally, among the given elements, hydrogen (H) has the lowest electronegativity, followed by germanium (Ge), strontium (Sr), chlorine (Cl), and cesium (Cs), which has the highest electronegativity. Therefore, the order of increasing electronegativity is: H < Ge < Sr < Cl < Cs.

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Answer:

a

Explanation:

Answer:

100

Explanation:

Will autoionzation of water be spontaneous at high temperature

The rise in kinetic energy with temperatures allows the solvent molecules to break apart the solute molecules that are held by intermolecular attractions.

There are two direct elements that influence solubility are

Temperature stimulates the solubility of both solids and gases, but the pressure is only concerned with the solubility of gases.

Thus,  solids are dissolved in liquid water, the solubility increases with temperature.

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Answer:

Conversion gives 42,107 km in total

Explanation:

A marathon covers 26 miles and 285 yards.

If 1 kilometer is 0.6214 miles, then how many kilometers are 26 miles, then:

1 km = 0.6214 miles

X = 26 miles

X = 41,841 km

Now if 1 yard is 36 inches, how many inches is 285 yards?

1 yard = 36 inches

285 yards = X

X = 10260 inches

If an inch is equal to 2.54 cm, how many centimeters are 10260 inches?

1 inch = 2.54 cm

10260 cm = X

X = 26060.4 cm

And 26060.4 cm is 0.260604 km

Finally, the sum of the distance would be:

41.841 km + 0.260604 km = 42.107 km

The solubility of the gas is reduced when thermal energy is added to the solution, which overcomes the forces of attraction between the solvent molecules and the gas molecules.

Just consider it from a straightforward angle. Is it true that heating a solvent accelerates evaporation? Which glass will entirely evaporate first, at a temperature of 25 or 75 degrees, if you place the same amount of water in them both?

Gases are already inherently gases. Imagine how anxious gas molecules would be to escape if solvent molecules were to want to escape from the bulk solvent when the temperature was raised.

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Answer:

Well, it would be the height of the plant. The independant varibles would be the amount of water you give the beans or the temperature you keep them!

Explanation:

I hope this helps!

A) A total of 24.89 g of zinc oxide will be produced if a 20-gram block of zinc were to completely oxidize.

B) A total of 3.91 gram of zinc is lost in the above process.

A) Using the following equation, we can calculate how much zinc oxide will be produced if a 20-gram block of zinc were to completely oxidize:2Zn + O₂ → 2ZnO

We know that 1 mole of zinc reacts with 1 mole of oxygen to produce 1 mole of zinc oxide. The molar mass of zinc is 65.38 g/mol, while the molar mass of zinc oxide is 81.39 g/mol.

To calculate how much zinc oxide will be produced from 20 g of zinc, we first need to convert 20 g of zinc to moles by dividing by the molar mass:20 g ÷ 65.38 g/mol = 0.306 moles of Zn

Since 1 mole of zinc reacts with 1 mole of oxygen, we know that there are also 0.306 moles of oxygen present.

Therefore, we can calculate the mass of zinc oxide produced by multiplying the number of moles of zinc oxide by its molar mass:0.306 moles of ZnO x 81.39 g/mol = 24.89 g of ZnO

B) If half the zinc were to corrode, the final mass of the block would be:20 g ÷ 2 = 10 g

Since half of the block has corroded, the other half will still be present. Therefore, the final mass of the block would be 10 g + the mass of the zinc oxide produced in part (A):10 g + 24.89 g = 34.89 g

Using the equation from (A), we can calculate the initial mass of zinc by subtracting the mass of the zinc oxide produced from the final mass of the block:-20.98 g +24.89 g = 3.91 g

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Answer:

The correct option is;

They can be produced at low cost

Explanation:

In comparison to several other manufacturing materials, some synthetic polymers such as plastics are more durable cost effective, flexible, faster to produce and  reliable

With regards to the cost comparison, the resins used for plastic are cheaper to obtain than mining for materials such as metals. In all quantities, it is cheaper to produce and manufacture plastics than to produce metals.

Due to the light weight and corrosion resistance of plastics, it is cheaper to store and transport plastics to several locations with different environment without the plastic requiring much effort for transportation or being affected by corrosion.

Answer:

d

Explanation:

Answer:

See below, please

Explanation:

Because the mole ratio

\( \frac{m(ch4)}{m(o2)} = \frac{1}{2} \)

Now, at the beginning

Mole m(CH4) =4 mol, m(O2) = 5 mol

If O2 gas is fully reacted, used up,

Need m(CH4) = 2.5 mol

Hence, the mole of CH4 left

m(CH4) = 4-2.5=1.5 mol

That means

At the end of the reaction,

m(CH4) =1.5 mol

m(O2) = 0 mol

Answer:

The answer is titanium.

Explanation:

Titanium (element 22) shares the same group - or column - as element 72, so they will have more properties in common.

The balanced equation for the combustion of ethane, C2H6, is: C2H6 + 3O2 → 2CO2 + 3H2OTo determine how much heat is produced if 7.0 moles of ethane undergo complete combustion, we need to use the balanced equation and the standard enthalpies of formation of the reactants and products.

The standard enthalpy of formation of a compound is the enthalpy change when one mole of the compound is formed from its constituent elements, with all reactants and products in their standard states (usually at 1 atm and 25°C).The standard enthalpies of formation of the reactants and products in the combustion of ethane are:

ΔHf°(C2H6) = -84.68 kJ/mol

ΔHf°(O2) = 0 kJ/mol

ΔHf°(CO2) = -393.51 kJ/mol

ΔHf°(H2O) = -285.83 kJ/mol

Now we can calculate the heat produced by using the difference between the enthalpies of the products and reactants:

2CO2 + 3H2O - (C2H6 + 3O2)

ΔH = 2(-393.51 kJ/mol) + 3(-285.83 kJ/mol) - (-84.68 kJ/mol + 3(0 kJ/mol))

ΔH = -1560.78 kJ/mol

Therefore, if 7.0 moles of ethane undergo complete combustion, the amount of heat produced will be:

-1560.78 kJ/mol x 7.0 mol

= -10,925.46 kJ or -10,925,460 J.

Note that the negative sign indicates that heat is released by the reaction, which is exothermic.

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The correct answer is (c) boiling point. The boiling point of a compound is related to its intermolecular forces and molecular weight, which affect the strength of its interaction with the stationary phase in the column.

In gas chromatography, the gas is separated based on the boiling point of the components in the mixture. The mixture is first vaporized and then injected into the column oven, which contains a stationary phase. As the gas moves through the column, the components in the mixture interact differently with the stationary phase and thus travel at different rates. This causes the components to separate and form distinct peaks in the chromatogram.

Therefore, the correct answer is (c) boiling point. The boiling point of a compound is related to its intermolecular forces and molecular weight, which affect the strength of its interaction with the stationary phase in the column. The higher the boiling point of a compound, the stronger its interaction with the stationary phase and the slower it moves through the column.

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Answer:

Because the amount of liquid water decreases and the amount of dissolved salt remains constant, the concentration of salt in the liquid water around the iceberg will increase.

Explanation:

Answer:

Because the amount of liquid water decreases and the amount of dissolved salt remains constant, the concentration of salt in the liquid water around the iceberg will increase.

Explanation:

PLATO exact answer

Explanation:

Newtons third law.. 100% your answer

Hence it  will not be useful in determining the pH of the solution.

Because each indicator has a specified pH range over which it changes color, a single indicator solution is only appropriate for detecting pH over a relatively small range.

For instance, Methyl Orange changes hue from pH 3.1 to pH 4.4. The indicator won't change color and won't be useful for figuring out the pH of the solution if the pH is outside of this range. will not be useful in determining the pH of the solution.

A material that changes color when it comes into touch with an acid or a base is known as a "indicator solution". The conjugate base or acid versions of indicators, which are typically weak acids or bases, exhibit distinct hues because to variations in their absorption spectra1. We refer to these as acid-base indicators.

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Answer:

No number means one atom. For CO2 there is one atom of carbon and two atoms of oxygen. For H2O, there is one atom of oxygen and two atoms of hydrogen. A molecule can be made of only one type of atom.

Explanation:

A molecule is a group of two or more elements held together by chemical bonds. There are 5 molecules and 15 elements are present in the \(\bold {5 CO_2 }\).

Molecule:

It is a group of two or more elements held together by chemical bonds. Molecules are electrically neutral.

For example- Carbon dioxide \(\bold {CO_2}\), is composed of two elements Carbon and 2 oxygen atoms.

Here, the prefix 5, represents the number of molecules, hence there are 5 molecules of carbon dioxide are present.

So, there are 5 elements of carbon and 10 elements of oxygen. It means a total of 15 elements in the given molecules.

Therefore, there are 5 molecules and 15 elements are present in the \(\bold {5 CO_2 }\).

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The law of conservation of matter says that in chemical reaction and the statement is the total mass of the product must equal the total mass of the reactant

The law of conservation of mass states that the mass in an isolated system is neither created nor destroyed by chemical reaction or physical transformation and according to the law of conservation of mass and the mass of the product in a chemical reaction must equal to the reactant that means total mass of the product must equal the total mass of the reactant

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Answer:

Ve explicación abajo

Explanation:

Responderemos esta pregunta en dos partes.

PAra la primera parte, usaremos la expresión de gases ideales la cual es:

PV = nRT (1)

Donde:

P: Presión (atm)

V: Volumen (L)

n: moles

R: constante universal de gases (0.082 L atm/ mol K)

T: Temperatura (K)

En este caso, tenemos un recipiente que se llena completamente de oxígeno (O₂) hasta 3 L. Este sería su volumen. a la presión de 740 mmHg, esta es la presión y debemos convertirla a atmosfera, y la temperatura de 10 °C que debe ser convertida a Kelvin. Con esos datos se puede calcular primero los moles de oxigeno y luego los gramos.

Transformando las unidades de presión y temperatura tenemos:

P = 740 mmHg * 1 atm / 760 mmHg = 0.974 atm

T = 10 + 273 = 283 K

Con estos datos, usaremos la expresión (1) para calcular los moles:

n = PV / RT

n = 0.974 * 3 / 0.082 * 283

n = 0.1259 moles

Con estos moles, se pueden calcular los gramos usando el peso molecular del oxigeno que es 16 g/mol. (Como tenemos 2 atomos, serían 32 g/mol):

m = n * PM

m = 0.1259 * 32

m = 4.0288 g

Ahora que tenemos la masa se puede calcular la densidad con la siguiente expresión:

d = m/V

Usando el volumen en mililitros (3 * 1000 = 3000 mL) y la masa obtenida, calculamos entonces la densidad.

d = 4.0288 / 3000

d = 0.00134 g/mL

Para la segunda y ultima parte del ejercicio, usaremos la ley de boyle donde se mantiene el volumen constante (en este caso 3 L) y solo se altera presión y temperatura. De esta forma calcularemos la temperatura necesaria para que la presión se reduzca a la mitad:

P₁/T₁ = P₂/T₂

Y queremos saber es la temperatura para que la presión sea la mitad de la presión inicial, por tanto:

P₂ = 1/2P₁

Sabiendo que la temperatura es de 10 °C (283 K) tenemos entonces:

P₁/T₁ = P₁/2T₂     Se cancelan las presiones y nos queda

1/T₁ = 1/2T₂

2T₂ = T₁

T₂ = 1/2T₁

Reemplazando la temperatura:

T₂ = 283 / 2

T₂ = 141.5 K

The composition "Ionisation" was composed by Edgard Varèse. It is considered a groundbreaking and influential piece in the realm of percussion ensemble music.

Completed in 1931, "Ionisation" is significant because it was one of the first compositions to exclusively focus on percussion instruments, without the inclusion of traditional melodic or harmonic elements.

Varèse explored the vast potential of percussion sounds, utilizing various instruments including drums, cymbals, sirens, and even unconventional objects like anvils and whistles.

The composition's rhythmic complexity, use of polyrhythms, and exploration of timbre pushed the boundaries of traditional musical conventions and expanded the possibilities for percussion ensemble compositions in the future.

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Answer:

ummm I really want to help with this problem but I think that you forgot the photo of Rebekah Pullin the turnip

The answer to the question is (e) because the enthalpy (hsoln) is always negative, but the entropy (ssoln) may be positive or negative depending on the specific solute and solvent.

When a solute is able to go spontaneously into solution, the enthalpy (hsoln) and the entropy (ssoln) of mixing play important roles. The enthalpy of mixing refers to the energy change that occurs when the solute dissolves in the solvent. The entropy of mixing refers to the degree of disorder that occurs when the solute dissolves in the solvent.
The correct answer to the question is (e) the enthalpy (hsoln) is always negative, but the entropy (ssoln) may be positive or negative. This means that the energy change that occurs during the dissolving process is always favorable, but the degree of disorder that occurs can be positive or negative depending on the specific solute and solvent.
Overall, the spontaneity of solute dissolution depends on the balance between the enthalpy and entropy changes during the process. If the enthalpy change is negative and the entropy change is positive, the dissolution process will be spontaneous. However, if the enthalpy change is positive and the entropy change is negative, the dissolution process will not be spontaneous.
In summary, the answer to the question is (e) because the enthalpy (hsoln) is always negative, but the entropy (ssoln) may be positive or negative depending on the specific solute and solvent.

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Answer:

Oxygen has an atomic number of 8 , and the mass number of an atom is the sum of its atomic number plus its neutron number. We got the mass as 16 units, and so it'll have 16−8=8 neutrons.

Explanation:

Acetic acid and sodium hydroxide used to make a buffer solution.

What is buffer solution?

buffer solution is a waterproof solvent based solution in  which consists of a mixture of  containing a weak acid and  the conjugate base of the weak acid, or a weak base of the solution and the conjugate acid of the weak base. They resist to a  change in pH upon to the  dilution or upon the addition of small amounts of a  acid/alkali to them. Buffer solution resist of a  change in pH when smallest amounts of a stronger acid or a stronger base are added.

Sol-Acetic acid is a weaker acid and  its conjugate base is the acetate anion. That's why the addition of the strong base, hydroxide, which neutralized half of a  acetic acid created a buffer and  solution because we are having  significant amounts of both acetic acid and its conjugate base, the acetate anion, in the solution.

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The percentage by mass of acetic acid is 5.14%

What is percentage by mass?

It is defined as ratio of mass of substance to the mass of all substance multiply by 100.It is way to express concentration.

CH3COOH+NaOH= CH3COONa+H2O

we have 1 mole of acid for 1mole of base

Now , C=n/V

C= 0.299M ( its M not m so correct question)

V= 24.5 mL

no of moles = 0.299moles/L × 0.0245 L = 0.00733 moles

for neutralization of 0.00733 moles of Noah require 0.00733 moles  of CH3COOH

given mass of acetic acid = no. of moles × molar mass

0.00733×60g/mole = 0.4398g

% mass of acetic acid =[ 0.4398g/8.55g]×100

⇒ 5.14%

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The Michaelis-Menten (rapid equilibrium) and Briggs-Haldane (PSSH/QSSA) approaches both assume that the rate of ES formation and breakdown are much faster than the rate of product formation.

The Michaelis-Menten approach assumes that the ES complex reaches equilibrium rapidly, and the concentration of ES remains constant during the reaction (steady state assumption). This leads to the derivation of the Michaelis-Menten equation, which describes the relationship between reaction rate and substrate concentration.

The Briggs-Haldane approach assumes that the rate of product formation is much slower than ES formation and breakdown, and that the concentration of ES is constant throughout the reaction (pseudo-steady-state assumption).

This allows the derivation of the Briggs-Haldane equation, which also describes the relationship between reaction rate and substrate concentration. The main difference between the two approaches is the assumption of steady state versus pseudo-steady state, which depends on the timescale of the reaction.

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