consider the following reaction: nh4cl(s) nh3(g) hcl(g) if a flask maintained at 564 k contains 0.167 moles of nh4cl(s) in equilibrium with 4.73e-2 m nh3(g) and 2.53e-2 m hcl(g), what is the value of the equilibrium constant at 564 k?

Answer: 30.7 moles

Explanation:

Answer: The percent yield for the \(NaBr\) is, 86.7 %

Explanation : Given,

Moles of \(FeBr_3\) = 2.36 mol

Moles of \(NaBr\) = 6.14 mol

First we have to calculate the moles of \(NaBr\)

The balanced chemical equation is:

\(2FeBr_3+3Na_2S\rightarrow Fe_2S_3+6NaBr\)

From the reaction, we conclude that

As, 2 moles of \(FeBr_3\) react to give 6 moles of \(NaBr\)

So, 2.36 moles of \(FeBr_3\) react to give \(\frac{6}{2}\times 2.36=7.08\) mole of \(NaBr\)

Now we have to calculate the percent yield for the \(NaBr\).

\(\text{Percent yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100\)

Experimental yield = 6.14 moles

Theoretical yield = 7.08 moles

Now put all the given values in this formula, we get:

\(\text{Percent yield}=\frac{6.14mol}{7.08mol}\times 100=86.7\%\)

Therefore, the percent yield for the \(NaBr\) is, 86.7 %

Answer:

\(4.6\,\,moL\,\,L^{-1}\)

Explanation:

Molarity refers to a measure of concentration.

Molarity = moles of solute/Litres of solution

Molarity refers to number of moles of solute present in this solution.

In order to find a solution's molarity, use value for the number of moles of solute  and the total volume of the solution expressed in liters

As molarity of 2.3 mol of Kl is dissolved in 0.5 L of water,

Molarity = \(\frac{2.3}{0.5} =4.6\,\,moL\,\,L^{-1}\)

The electronic configuration of the element Sb (antimony) can be determined by referring to the periodic table. Antimony has an atomic number of 51, which means it has 51 electrons.

Writing out the electronic configuration using superscript with the orbital:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p³

Writing out the electronic configuration using noble gas notation:

[Noble Gas] 5s² 4d¹⁰ 5p³

The noble gas notation allows us to use the symbol of the noble gas element that comes before the element of interest in the periodic table. In the case of Sb, the noble gas that comes before it is Kr (krypton), which has the electronic configuration [Kr] 5s² 4d¹⁰. Therefore, we can replace [Kr] with its electronic configuration and continue with the remaining electrons.

Ranking the atoms in each group in order of increasing size:

a. beryllium < boron < neon

b. nitrogen < phosphorus < arsenic

c. argon < phosphorus < chlorine

The size of an atom is determined by its atomic radius, which generally increases as you move down a group in the periodic table and decreases as you move across a period from left to right.

Identifying the element from which it is easier to remove an electron:

a. lithium (Li) is easier to remove an electron compared to beryllium (Be)

b. fluorine (F) is easier to remove an electron compared to oxygen (O)

c. neon (Ne) is easier to remove an electron compared to krypton (Kr)

d. phosphorus (P) is easier to remove an electron compared to gallium (Ga)

The ease of removing an electron, or ionization energy, generally decreases as you move down a group and increases as you move across a period in the periodic table.

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Answer:

24.3

Explanation:

Two containers of gas have the same volume, temperature and pressure. One container has a sample of oxygen gas having a mass of 3.95g. The other container has a gas with a mass of 2.99g. Determine the molar mass of the gas in the second container.

O2 has a molar mass of 16 X 2 =32

the number of moles for O2 is the weight divided by the molar mass or, but since the two container have the same P,V, AND T they have the same number of moles since

PV =nRT

SO

the weight of the gas in the second container divided by its molar mass =

0.123

or

2.99/? = 0.123

so

? = 2.99/o.123 = 24.3

Answer:

Chemical to thermal to mechanical

Explanation:

It is because gasoline is chemical energy which turns to thermal. Because it said hot gas which is thermal energy. Then it turns to mechanical for the car to even move.

All seeing eyes:

i know your answer it is the third one (C, chemical to thermal to mechanical)

Explanation:

my all seeing eyes know all the answers

Answer:

bob up and down

Explanation:

i think it is the answer i am not sure

Answer:

They share an outer electron.

Explanation:

For complementary reasons, sodium and chlorine are both highly reactive. Sodium has a single electron in its outermost, third shell, and chlorine has one electron less than eight in its outermost, fourth shell. They form a strongly bound molecule by sharing that outer electron.

False: Green apple flavor in beer is not likely caused by bacterial contamination. The green apple flavor is typically associated with a compound called acetaldehyde.

Which is produced during fermentation. Acetaldehyde can result from various factors such as incomplete fermentation, yeast stress, or oxygen exposure. It is not necessarily indicative of bacterial contamination. Bacterial contamination in beer can lead to off-flavors, but these are usually different from the green apple flavor.  The green apple flavor in beer is not likely caused by bacterial contamination. It is typically attributed to acetaldehyde, a compound formed during fermentation. Acetaldehyde can result from factors like incomplete fermentation, yeast stress, or oxygen exposure. Bacterial contamination in beer can lead to different off-flavors, but it is not directly associated with the green apple flavor.

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Answer:

they become water vapor and after that, they become a type of precipitation

Answer:

Correct question is;

Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is?

Answer:

6%

Explanation:

From ohms law, we know that;

R = V/I

Where;

R is resistance

V is voltage

I is current

Now, the percentage error in the resistance is given by the formula;

ΔR/R = ΔV/V+ ΔI/I

We are told that the current and the voltage difference have a percentage error of 3% each. Thus;

ΔR/R = 3% + 3% = 6%

Answer:

The burning of a candle is both a physical and a chemical change.

Explanation:

Plz mark brainliest thanks

Lowering the pressure in a container will cause the liquid in the container to boil faster because it becomes easier for the molecules to escape.

Boiling happens when the vapor pressure of a liquid equals the atmospheric pressure.

By lowering the atmospheric pressure, the vapor pressure of a liquid takes a lower time to equal the atmospheric pressure.

Thus, it becomes easier for the molecules of the liquid to escape from each other.

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Preparing a supersaturated solution involves dissolving more solute in a solvent than it can normally hold at a given temperature.

Start with a clean and dry container to minimize impurities.

Gradually add the solute to the solvent while continuously stirring. It is crucial to add the solute slowly to avoid triggering crystallization.

Continue stirring the solution until no more solute can dissolve, resulting in a saturated solution.

Apply external factors to increase the solubility of the solute. This can be done by raising the temperature or adding pressure, depending on the specific solute-solvent combination.

Once the solute is fully dissolved under these altered conditions, carefully cool or depressurize the solution while keeping it undisturbed. This promotes the formation of a supersaturated solution.

The resulting supersaturated solution contains an excess of dissolved solute that exceeds its normal solubility limit.

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89.74% is the percentage yield of the product. Hence, option D is correct.

The percentage can be calculated by dividing the value by the total value and then multiplying the result by 100.

Given data:

Actual yield of product = 2.80 g

Theoretical yield = 3.12 g

Percent yield = ?

Formula:

Percent yield =  \(\frac{\;actual \;yield \;X \;100}{theoretical \;yield}\)

by putting values in the formula,

Percent yield =\(\frac{2.80 g X 100}{ 3.12 g}\)

Percent yield = 89.74%

Hence, option D is correct.

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Answer:

The water cycle or hydrologic is a continuous cycle where water evaporates, travels into the air and becomes part of a cloud, falls down to earth as precipitation, and then evaporates again. ... These areas are usually close to oceans or large bodies of water that allow more water to evaporate and form clouds.

Explanation:

The combustion of 0.87 gallons of octane produces approximately 6.98 kg of CO₂ and 3.21 kg of H₂O.

To calculate the amount of CO₂ and H2O produced in the combustion of octane, we need to first convert the volume of octane from gallons to moles using its density and molar mass.

The density of octane is around 0.703 g/mL and its molar mass is 114.23 g/mol. One gallon is approximately 3.785 liters.

So, the amount of moles of octane in 0.87 gallons is:

moles of octane = (0.87 gallons) x (3.785 L/gallon) x (0.703 g/mL) / (114.23 g/mol) = 19.8 moles

The balanced chemical equation for the combustion of octane is:

2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O

From this equation, we see that 2 moles of octane reacts with 25 moles of oxygen to produce 16 moles of CO₂ and 18 moles of H₂O.

Using stoichiometry, we can calculate the amount of CO₂ and H₂O produced from 19.8 moles of octane:

To convert moles to grams, we can use the molar mass of each compound:

Therefore, the combustion of 0.87 gallons of octane produces approximately 6.98 kg of CO₂ and 3.21 kg of H₂O.

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To create photochemical smog, in addition to volatile organic compounds (VOCs), the presence of nitrogen oxides (NOx) is required. The combination of these two groups of pollutants can lead to the formation of ground-level ozone and other harmful secondary pollutants.

In addition to volatile organic compounds (VOCs), the presence of nitrogen oxides (NOx) is required to create photochemical smog. NOx is a term used to describe the family of nitrogen oxides, which include nitrogen monoxide (NO) and nitrogen dioxide (NO2), both of which are produced mainly from vehicle emissions, industrial processes, and combustion of fossil fuels.

When VOCs and NOx are emitted into the atmosphere and are exposed to sunlight, a series of complex photochemical reactions occur. This can result in the formation of ground-level ozone, a key component of photochemical smog, as well as other harmful secondary pollutants such as peroxyacetyl nitrate (PAN) and aldehydes.

Therefore, to create photochemical smog, the presence of both VOCs and NOx is necessary.

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False. The statement "4 L is the volume of any gas regardless of atmospheric conditions" is incorrect. The volume of a gas is not solely determined by its physical quantity but is also influenced by atmospheric conditions such as pressure and temperature.

According to the ideal gas law, the volume of a gas is directly proportional to the amount of gas (measured in moles) and the temperature, and inversely proportional to the pressure. The ideal gas law equation is expressed as:

PV = nRT

where:

P is the pressure of the gas,

V is the volume of the gas,

n is the number of moles of the gas,

R is the ideal gas constant, and

T is the temperature of the gas.

This equation shows that the volume of a gas is influenced by the pressure and temperature conditions. In different atmospheric conditions, the volume of a gas can vary.

Therefore, the statement that "4 L is the volume of any gas regardless of atmospheric conditions" is false. The volume of a gas depends on the specific pressure and temperature conditions in which it is measured.

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Answer:

B

Explanation:

The mechanism of this process: the electrolytic cell converts the electrical energy to chemical energy, using external energy source.

The statement which describes one characteristic of an operating electrolytic cell is it requires an external energy source.

Hence, option (B) is correct answer.

Electrolytic cell can be defined as an electrochemical device that requires an external source of electrical energy to facilitate a non-spontaneous redox reaction. It converts electrical energy in to chemical potential energy and this process is called electrolysis. In electrolytic cell anode is positive and cathode is negative.

A nonspontaneous redox reaction occurs when an external voltage is applied. Electrolytic cell is non spontaneous redox reaction.

Thus, from above conclusion we can say that The statement which describes one characteristic of an operating electrolytic cell is it requires an external energy source.

Hence, option (B) is correct answer.

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When k1 > k2, the KM is most analogous to the Kd. This is because KM is the concentration of substrate at which the reaction rate is half of its maximum velocity, and Kd is the dissociation constant, which is the concentration of ligand at which half of the receptor binding sites are occupied.

In both cases, they represent the affinity of the enzyme or receptor for the substrate or ligand, respectively. The Ka is the association constant, which is the inverse of Kd, and is not directly related to KM. The Kcat is the turnover number, which represents the maximum number of substrate molecules converted to product per unit time by a single enzyme molecule when it is saturated with substrate, and 1/Kcat is the catalytic efficiency, which is not directly related to KM either.
When k-1 > k2 (the rate constant for dissociation of the enzyme-substrate complex is greater than the rate constant for conversion to product), the KM is most analogous to: 1) the Kd

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An exothermic process releases heat causing the temperature of the immediate surroundings to rise in endothermic process absorbs heat and cools the surroundings so exothermic process releases heat while an endothermic process absorbs heat

Answer:

Mountains

Explanation:

Mountains are colder than the lower elevations.  When humid air enters a cooler region, the saturated air begins to cool  and this reduces the ability of the air to maintain the evaporated water is the gas state.  Molecules of water have reduced enerfy at the cooler temperatures.  They will slow down and coalesce with other water molecules to form small droplets of water.  The atmoshere cannot hold these heaevier droplets and they begin to fall  (i.e., rain).

One migh ask why does the air temperature drop at higher altitudes?  Heat rises, so why shouldn't it be warmer on top a mountain, compared to the valley.  The reason is that the atmosphere becomes less dense the further from Earth's center on gets.  This less dense air has a lower water saturation point, so it rains.

Answer:

qwe

Explanation:

wqe