What is the volume of a solution that can be made from 35.0 grams of silver phosphide if the molarity is 0.250 M?

KNO₃  in H₂O gives a more concentrated solution than KNO₃ in CCl₄

1. KNO₃ in H₂0

• KNO₃ contains potassium and nitrate ions and so is an ionic compound held by ionic bond

• Ionic compounds dissolve in water because water being polar in nature, break the ionic bond and interact strongly with positive and negative ions of the ionic compound. Therefore, Kno3 in water is more concentrated.

2. KNO₃ in CCl₄

• CCl₄is an organic, non-polar solvent

• Ionic compounds does not dissolve in CCl₄ because CCl₄ being non polar in nature, cannot decrease the force of attraction between the ions.  Therefore, KNO₃ in CCl₄ is less concentrated.

Thus we can conclude that ionic compounds dissolve in polar solvents but not in non-polar solvents.

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Answer:

Actual yield and theoretical yield

Taking into account the definition of molarity, the molarity of the solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution is 0.75 \(\frac{moles}{liter}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case, you know:

Replacing in the definition of molarity:

\(Molarity=\frac{3 moles}{4 L}\)

Solving:

molarity= 0.75 \(\frac{moles}{liter}\)

Finally, the molarity of the solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution is 0.75 \(\frac{moles}{liter}\).

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The standard cell potential, ecell, is a measure of the potential difference between the two half-cells in a redox reaction. A positive value of ecell indicates that the reaction is spontaneous, while a negative value indicates that the reaction is non-spontaneous.

To answer your question, we need to consider the concept of spontaneity in redox reactions. Spontaneous reactions are those that occur naturally without the need for an external energy input. In the case of redox reactions, a spontaneous reaction is one where the electrons flow from the anode to the cathode, resulting in a positive cell potential.

The standard cell potential, e∘cell, is a measure of the potential difference between the two half-cells in a redox reaction. A positive value of e∘cell indicates that the reaction is spontaneous, while a negative value indicates that the reaction is non-spontaneous.

In your case, the standard cell potential is e∘cell= 0.85v at 25 ∘c. Since this value is positive, we can conclude that the redox reaction of the cell is spontaneous. Therefore, under standard conditions, the electrons will naturally flow from the anode to the cathode, generating a positive cell potential of 0.85 volts.

In summary, the redox reaction of the cell is spontaneous because the standard cell potential is positive.

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Answer:

the energy produced as part of the reaction and balancing the equation accounts for the energy produced

When ethanol is added to strawberry extract in the final step, it acts as a solvent and helps to separate the different components of the extract. Adding ethanol to strawberry extract in the final step helps to separate the different components of the mixture and isolate the desired compounds.

Ethanol is a polar solvent, which means that it has a slightly positive charge on one end and a slightly negative charge on the other. This polarity allows it to attract and dissolve other polar molecules, such as sugars and organic acids, which are present in the strawberry extract.

By adding ethanol to the strawberry extract, these polar molecules are extracted from the mixture and dissolve into the ethanol. This process is known as extraction, and it is commonly used in chemistry and biology to isolate specific compounds from complex mixtures.

Once the ethanol has extracted the polar molecules from the strawberry extract, it can be separated from the mixture through a process called filtration or centrifugation. This leaves behind a concentrated solution of the nonpolar compounds in the strawberry extract, such as the flavor and aroma molecules.

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Answer:Al

Explanation:

To determine the mass of H₂O produced, one need to calculate the stoichiometry of the balanced chemical equation and use it to find the molar amounts involved. After solving the answer is the mass of H₂O that can be produced is approximately 4.53 grams.

The balanced chemical equation is:

H₂SO₄ + Ca(OH)₂ -> 2 H₂O + CaSO₄

the number of moles of H₂SO₄:

Given mass of H₂SO₄= 12.35 grams

Molar mass of H₂SO₄= 98.09 g/mol

Number of moles of H₂SO₄= Mass / Molar mass

= 12.35 g / 98.09 g/mol

≈ 0.1258 mol (rounded to four decimal places)

Since the stoichiometric ratio between H₂SO₄ and H₂O is 1:2, the number of moles of H₂O produced is twice the number of moles of H₂SO₄.

Number of moles of H₂O = 2 × Number of moles of H₂SO₄

= 2 × 0.1258 mol ≈ 0.2516 mol (rounded to four decimal places)

Molar mass of H₂O= 18.015 g/mol

Mass of H₂O= Number of moles of H₂O×Molar mass of H2O

= 0.2516 mol × 18.015 g/mol ≈ 4.53 grams (rounded to two decimal places)

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The fact of expanding of water as much as 9% of its volume as it freezes is the basis of frost wedging.

Water starts to contract as expected after it is cooled to a temperature of roughly 4 degrees Celsius. Once it hits the freezing point, it continues to grow gradually until it freezes and expands by around 9%.

When water fills a fissure, it freezes, expands (8–11% more volume than liquid water), and this process results in frost wedging. An enormous amount of pressure (up to 30,000 pounds per square inch) is applied to the rock by the growing ice, which causes the crack to widen.

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The possible values you could measure for a particle's energy depend on the specific system and context. In quantum mechanics, the energy of a particle is quantized, meaning it can only take on certain discrete values rather than any arbitrary value.

For a particle confined within a potential well or bound within an atom or molecule, the energy levels are quantized, and the particle can only have certain specific energy values. The allowed energy values depend on the particular system and are determined by the solution of the Schrödinger equation.

In other cases, such as free particles with no potential confinement, the energy can be continuous and take on a range of values. For example, in classical mechanics, the kinetic energy of a free particle can vary continuously, depending on its speed.

In summary, the possible values you could measure for a particle's energy depend on whether the system is quantum or classical, and if it is quantum, it depends on the specific quantum system and its energy level structure.

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Answer:

beacuse water is same every where because it is the combination of h2 +o2 h2o which doesn't change while it is different

Explanation:

ok

Explanation:

scandium

MN+4 means Mn has lost 4 electron which makes it orbital look like that of scandium

Here, we are required to determine which neutral atom is isoelectronic with MN+4.

Therefore, for Manganese, Mn in its neutral charge state,

However, MN+4 means the loss of 4 electrons and therefore,

Ultimately, a neutrally charged atom which has equal number of electrons (isoelectronic) as Mn+4 is Scandium.

Scandium in its neutral charge state has atomic number 21, consequently it has 21 protons and 21 electrons.

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Answer:  They belong to the same kingdom but different phyla.

Explanation:

The molarity of the aqueous solution of NaOH is 1.0 x \(10^-^1^0\) mol/L if its pH is measured and found to be 10.00, as the pH of a solution is a measure of the concentration of hydrogen ions ([H+]) present in the solution.

pH = -log[H+]

10.00 = -log[H+]

[H+] = \(10^-^p^H\)

[H+] =     \(10^-^1^0\)

[H+] = 1.0 x\(10^-^1^0\) mol/L

Since NaOH is a strong base, it dissociates completely in water to give Na+ and OH- ions. The concentration of hydroxide ions ([OH-]) in the solution is equal to the concentration of NaOH:

[OH-] = [NaOH]

The concentration of hydroxide ions to find the molarity of the NaOH solution:

Molarity = moles of solute / volume of solution (in liters)

Molarity = [OH-] = [NaOH]

Molarity = 1.0 x\(10^(^-^1^0^)\)mol/L

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Answer:

7500000cm/hr

Explanation:

6km=600000cm

24min=24/60hr=0.4hr

so, according to the question

6k/24km=600000cm÷0.4hr

=1500000cm/hr

therefore in 5 hours we can run:

5×1500000cm/Hr

=7500000cm/hr

A person can run "7,500,000 cm" in 5 hours.

According to the question,

A person can run 6 km in 24 minutes, i.e.,

= \(\frac{6}{24} \ km/min\)

and,

5 hours = 300 minutes

then,

→  A person can run in 5 hours:

= \(\frac{6}{24}\times 300\)

= \(\frac{1800}{24}\)

= \(75 \ km\)

By converting km into cm, we get

= \(7500000 \ cm\)

So the above is the right answer.

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As the effective nuclear charge increases, electron affinity generally increases.

Electron affinity increases to the right, while EI increases to the right and upwards. Thus, the general trend of electronegativity is to grow to the right and upwards. The further to the right, the greater the effective nuclear charge and the greater the atom's ability to pull electrons toward it.

In this case, we can say that as the effective nuclear charge increases, electron affinity generally increases.

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Answer:

212°F , 100°C , 373.15°K

They are all the same, in different units.

Answer:

The boiling point of water is 212 degrees fahrenheit, and/or 100 degrees celsius.

Answer: "donate" hydrogen ions

Explanation:

Answer: Carbon Monoxide (CO), Sulfur Dioxide (SO2), and Nitrogen Dioxide(NO2).

Explanation:

Exposure to these noxious gases severely affects the respiratory system of an individual thus deteriorating his health. Pneumonia and Bronchitis are the tips of an iceberg among various diseases and prolonged illnesses.

Answer:

0.41 and 0.02 moles Au

Explanation:

Moles:

81 grams (2.6 troy oz):

mole Au = 81g/(196.97 g/mole) = 0.41 moles Au

4.0g (0.13 oz):

mole Au = 4.0g/(196.97 g/mole) = 0.020 moles Au

Answer:

V = 100 ml

Explanation:

P1V1 = P2V2

P1 = 2.0 atm

V1 = 200ml

P2 = 4.0 atm

V2 = ?

(2.0)(200) = (4.0)V2

400 = (4.0)V2

V2 = 100

The new pressure will be

1000 L

, rounded to one significant figure.

Explanation:

Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely. The equation to use is

P

1

V

1

=

P

2

V

2

.

Given

V

1

=

200

mL

×

1

L

1000

mL

=

0.2 L

P

1

=

700 mmHg

V

2

=

100

mL

×

1

L

1000

mL

=

0.1 L

Unknown

P

2

Equation

P

1

V

1

=

P

2

V

2

Solution

Rearrange the equation to isolate

P

2

and solve.

P

2

=

P

1

V

1

V

2

P

2

=

(

700

mmHg

×

0.2

L

)

0.1

L

=

1400 L

, which must be rounded to

1000 L

because all of the measurements have only one significant figure

Answer:

carboxyl group and an amine group and other groups, depending on its structure.

There are several types of polyatomic ions, and they are typically listed in order by charge. polyatomic ion is a molecule made up of two or more atoms that are covalently bonded

Polyatomic ions can be classified according to their charge, which can be positive or negative. The most common polyatomic ions with a positive charge are ammonium (NH4+), hydronium (H3O+), and mercury (I) (Hg2 2+). The most common polyatomic ions with a negative charge include hydroxide (OH-), nitrate (NO3-), sulfate (SO4 2-), and phosphate (PO4 3-).

In general, polyatomic ions with a higher charge tend to be less stable than those with a lower charge, and they can also have a greater impact on the chemical properties of the compounds in which they are found. Understanding the types of polyatomic ions and their properties is an important aspect of studying chemistry and related fields.

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3. All substances have positive entropy values at temperatures above 0 K. this is correct statement.

Statement 1 is incorrect. The entropy of a substance generally increases when it is converted from a solid to a liquid. The increased freedom of movement and greater number of available microstates in the liquid phase lead to an increase in entropy.

Statement 2 is incorrect. The entropy of a substance generally increases as the number of atoms or particles increases. More atoms or particles contribute to a greater number of possible arrangements and microstates, resulting in higher entropy.

Statement 3 is correct. According to the third law of thermodynamics, all substances have positive entropy values at temperatures above absolute zero (0 K). At absolute zero, the entropy of a perfectly ordered crystal is considered to be zero, but as the temperature increases, the randomness and disorder (entropy) of the system also increase.

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Answer:

Yes

Explanation:

Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.

Exothermic reaction - A chemical reaction in which heat energy is given out .

Buring of natural gas , respiration, formation of compost from vegetables matter also exothermic processes.

Examples

C(s)+O2(g)⸻➤CO2(g)+94.00kcal

2H2(g) +O2(g)⸻➤2H2O(l) +136.0kcal

Endothermic reaction - A chemical reaction in which heat energy is absorbed is called endothermic reaction.

Example

C(s)+2S⸻➤CS(l)-22kcal

C(s)+H2O⸻➤CO(s) +H2(s)-31.4 kcal

{ ⸻➤at 1100°C }

Answer:

24.1 %

Explanation:

This is the reaction of oxygen between hydrogen sulfide.

The equation is:

2H₂S  +  O₂ →  2S  +  2H₂O

As the oxygen is the excess, limting reagent is the H₂S.

We convert the mass to moleS: 22g / 34.06 g/mol =

0.646 moles

Ratio is 2:2. 2 moles of sulfide can produce 2 moles of sulfur.

Then, 0.646 moles of sulfide will produce 0.646 moles of S.

We convert the moles to mass: 0.646 mol . 32.06 g/mol =

20.71 g

That's the theoretical yield.

% yield = (produced yield / theoretical yield) . 100

% yield = (5 g/ 20.71g) . 100 =  24.1 %

Answer:

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun.

The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. Although this inner core is white hot, the pressure is so high the iron cannot melt.

The iron isn't pure—scientists believe it contains sulfur and nickel, plus smaller amounts of other elements. Estimates of its temperature vary, but it is probably somewhere between 9,000 and 13,000 degrees Fahrenheit (5,000 and 7,000 degrees Celsius).

Above the inner core is the outer core, a shell of liquid iron. This layer is cooler but still very hot, perhaps 7,200 to 9,000 degrees Fahrenheit (4,000 to 5,000 degrees Celsius). It too is composed mostly of iron, plus substantial amounts of sulfur and nickel. It creates the Earth's magnetic field and is about 1,400 miles (2,300 kilometers) thick.

You can get more info, in national geographic.

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