what is the correct name of Fe(CN)3?

The molecular formula of the compound is determined as P₂F₄.

Molecular formula tells us which atoms and how many of each type of atom are present in the molecule.

Molar mass of CaF₂ is 78.07 g/mol(0.2631 g  CaF₂) × (1 mol  CaF₂ / 78.07 g  CaF₂) = 0.00337 mol  CaF₂

2F- + Ca₂+ →  CaF₂

(0.00337 mol  CaF₂) × (2 mol F / 1 mol  CaF₂) = 0.00674 mol F

As, Molar mass of F is 18.9984 g/mol

So, (0.00674 mol F) × (18.9984 g F / 1 mol F) = 0.12805 g F

1 mmHg = 0.00131578947 atm

(97.3 mmHg) × (0.00131578947 atm / 1 atm) = 0.128 atm

(378 cm³) × (1L / 1000 cm³) = 0.378 L

Now, T = 77 + 273 = 350 K

As, PV = nRT

n(PxFy) = PV / RT

n(PxFy) = (0.128 atm × 0.378 L) / (0.0821 L atm mol-1 K-1 × 350 K) = 0.001684 mol

n(PxFy) = 0.001684 mol

n(PxFy) = m(PxFy) / M(PxFy)

M(PxFy) = m(PxFy) / n(PxFy) = (0.2324 g) / (0.001684 mol) = 138 g/mol

m(PxFy) = m(P) + m(F)

0.2324 g = m(P) + 0.12805 g

m(P) = 0.2324 - 0.12805 = 0.10435

m(P) = 0.10435 g

Molar mass of P is 30.9737 g/mol

so, (0.10435 g P) × (1 mol P / 30.9737 g P) = 0.003369 mol P

Now, n(P) : n(F) = 0.003369 mol : 0.00674 mol = 1 : 2

Therefore, empirical formula of PxFy is PF₂

Molar mass of PF₂ 68.9705 g/mol

Molecular formula of PxFy is ( PF₂)n

n = M(PxFy) / M( PF₂) = (138) / (68.9705) = 2

Therefore, the molecular formula of PxFy is P₂F₄.

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In a drought-stricken area where city dwellers and farmers compete for water resources, both sides have valid claims for prioritizing their needs. it is essential for policymakers to consider both sides' needs and work towards a balanced and sustainable solution for water allocation.

1. Farmers:
- Agriculture is essential for food production, and without sufficient water, crops will not grow, leading to potential food shortages.
- The livelihood of farmers depends on the success of their crops, so prioritizing their water needs is crucial for their economic well-being.
- Supporting agriculture may have positive effects on the local economy, as it provides jobs and resources for other industries.
2. City dwellers:
- Water is necessary for basic human needs, such as drinking, cooking, and hygiene, so ensuring an adequate supply for city dwellers is essential for maintaining public health.
- Urban populations often have limited alternatives for water sources, unlike farmers who may have access to wells or other natural resources.
- Prioritizing city dwellers' water needs may be seen as supporting a larger population, given the higher population density in urban areas.
To resolve such disputes, it is essential for policymakers to consider both sides' needs and work towards a balanced and sustainable solution for water allocation. This may involve implementing water conservation strategies, developing alternative water sources, or investing in more efficient agricultural practices.

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while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.

How to solve the problem?

The statement that is NOT true of zinc is "Grains are the most reliable food sources of zinc." While grains can be a source of zinc, they are not necessarily the most reliable source.

Zinc is an essential mineral that plays important roles in many biological processes, including immune function, protein synthesis, wound healing, and DNA synthesis. It is involved in various enzymatic reactions, and acts as a cofactor for many enzymes. Zinc is also important for proper growth and development, especially during childhood and adolescence.

Excess zinc intake can lead to decreased copper absorption, as both minerals compete for absorption in the intestines. This can lead to copper deficiency, which can cause anemia neutropenia, and other health problems. Therefore, it is important to maintain a balance between zinc and copper intake.

While grains can be a source of zinc, other foods such as meat, seafood, and dairy products are also good sources. Vegetarians and vegans may need to pay particular attention to their zinc intake, as plant-based sources of zinc may be less bioavailable than -based sources. Zinc supplements can also be used to prevent or treat deficiencies, but should be used with caution as excessive intake can have negative health effects.

In summary, while zinc is an important mineral with numerous functions in the body, it is not true that grains are the most reliable food source of zinc. A balanced diet that includes a variety of foods can provide adequate zinc intake for most people.

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Answer:

Heterogeneous mixture

Explanation:

Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture.

T=41+273=314 k

M=(12)+(16×2)=44g/mol

d=PM/RT

d=685×44/0.0821×314

d=1169.15 g/L

Answer:

Explanation:

To find the concentration of a solution, we need to divide the number of moles of solute by the volume of the solution in liters.

In this case, we have 0.50 mol of NaCl dissolved in 0.30 L of solution. Therefore, the concentration of the solution can be calculated as:

Concentration = moles of solute / volume of solution

Concentration = 0.50 mol / 0.30 L

Concentration = 1.67 mol/L

Therefore, the concentration of the solution is 1.67 mol/L.

A solution is a homogeneous mixture of a solute and a solvent. Both can be solid, liquid, or gas. Solutions exist for every possible phase of the solute and the solvent.

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. Remember, solutions are homogeneous mixtures.

You can find many solutions in your daily life.

For example, solutions are salt and water, rubbing alcohol, and sugar dissolved in water.

Let's take salt and water.

Solute here is the salt and the water is the solvent. The amount of solvent is higher than solute in a solution.

When you look closely, upon mixing salt with water, you can't see the salt particles anymore, making this a homogeneous mixture. That is why the mixture of salt and water is a solution.

Answer:

42.75 grams of SiCl2Br2 must be weighed out

Explanation:

Here is the complete question:

An experiment requires that enough SiCl2Br2 be used to yield 13.2g of bromine . How much SiCl2Br2 must be weighed out?

Explanation:

First, we will determine the Molar mass of SiCl2Br2,

Si = 28.08, Cl = 35.45, Br = 79.90

Molar mass of SiCl2Br2 = 28.08 + 35.45(2) + 79.90(2)

= 258.78

Hence, the molar mass of SiCl2Br2 is 258.78 g/mol

If 79.90 grams of bromine is present in 258.78 grams of SiCl2Br2

Then, 13.2 grams of bromine will be present in \(x\) grams of SiCl2Br2

\(x\) = (13.2× 258.78) / 79.90

\(x\) = 42.75 grams

Hence, 42.75 grams of SiCl2Br2 must be weighed out.

Answer:

Explanation:

C

Answer:

They never cross with one another. They have the same strength. They seek the path of least resistance between opposite.

Explanation:

The main characteristic of a magnet is that they attract or repel other objects without touching. The attraction and repulsion depend upon the property of the object. We feel like the magnet pushes the object when it is repelling and pulls if it is attracting.

Answer:

Organism B produces pyruvic acid at a faster rate as the temperature increases than Organism A.

Explanation:

Helen takes 35 nights to knit a total of 175 centimeters of scarf. Hence, she will take 36 nights to knit 180 centimeters of scarf.

Length is a basic measurement in for an object which is basically taken in meters or centimeters. The basic unit of length in American standard is meters (m) and in CGS system it is centimeters.

It is given that, Helen knit a total of 175 centimeters of a scarf over 35 nights. Then, the length she knit in one nigh is calculated as:

175/35 = 5 cm.

Therefore, the number of nights required to complete 180 cm is :

180 /5 = 36

Thus, she will take 36 nights to knit a total of 180 cm of scarf.

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For the principal quantum number n = 5, the values of l that are possible are;  0, 1, 2, 3, 4

The position of the electron in an atom are shown by the quantum numbers. The quantum numbers give the description that matches the possible place that the electron could be found in a given atom. The set of quantum numbers are;

1) Principal quantum number

2) Magnetic quantum number

3) Spin quantum number

4) Orbital quantum number.

We know that the values of the principal quantum number would vary with the values of the orbital quantum number thus we have that the values of the orbital quantum numbers must be in the range of 0 to n - 1

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Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

The free magnet will gradually feel a pull toward the magnet that is fixed when it is brought slowly toward the magnet that is affixed.

Inside an iron rod, there are hardly any magnetism regions. When a powerful magnet is present, these domains align with the preponderance of the north seeking ends going in the same direction. This occurrence causes the polarities to be different. A magnet has a pole that faces south on one end and a pole that faces north on the other. Because the Antarctic area has historically been referred to as the South Pole and because the Earth is thought to contain a strong magnet, this phrase is used as a point of reference.

Two magnet magnets that are opposed to one another are attracted to one another. When like sides are forced together, a force of repulsion is produced. In a magnetic field, opposite poles attract and similar poles resist one another.

The free magnet will gradually experience a draw to the magnet that is fixed when it is gently moved toward the magnet that is fixed and taped. The power of attraction grows as the opposite sides get closer to one another.

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A mixture can be defined as a physical blend of two or more substances that are not chemically combined.

They retain their own properties and can be separated by physical means like filtration, distillation, evaporation, or magnetism. The various types of mixtures include homogeneous mixtures, heterogeneous mixtures, and colloids.Homogeneous mixtures, also known as solutions, are uniform mixtures where the composition is the same throughout. They are not visibly different and consist of a solute (the substance being dissolved) and a solvent (the substance doing the dissolving). For example, salt water is a homogeneous mixture because the salt is dissolved uniformly throughout the water.Heterogeneous mixtures are non-uniform mixtures that consist of two or more phases, each with its own distinct properties. They can be seen with the eye, and the different components can be separated using physical means. An example of a heterogeneous mixture is oil and water. They can be mixed together, but they will eventually separate.Colloids are mixtures where the particle size is intermediate between that of a solution and a suspension. The particles are small enough to not be visible to the eye, but they are large enough to scatter light. Milk is an example of a colloid because it appears homogeneous but is actually made up of small particles of fat and protein dispersed throughout the liquid.In conclusion, a mixture is a physical blend of two or more substances that are not chemically combined. They can be separated by physical means and consist of homogeneous mixtures, heterogeneous mixtures, and colloids.

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The volume at which the balloon bursts is 150.7 L.

To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas.

The combined gas law is expressed as:

(P1 x V1) / (T1) = (P2 x V2) / (T2)

We can convert the initial pressure to torr by multiplying by 760 torr/1 atm, and convert the temperatures to Kelvin by adding 273.15 to the Celsius temperatures.

Substituting the given values into the equation, we get:

(1.00 atm x 14.9 L) / (293.15 K) = \((26.0\ torr *V2) / (223.15 K)\)

Solving for V2, we get:

V2 = \((1.00\ atm * 14.9 L * 223.15 K) / (293.15 K * 26.0\ torr)\)

= 150.7 L

Therefore, the volume at which the balloon bursts is 150.7 L.

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Answer:

the answer is chemical element because when a symbol consists of two letters the first letter is always capitalized

The balanced chemical equation for the decomposition of aspirin (acetylsalicylic acid) is:

\(2C_{9}H_{8}O_{4} (aspirin) → 2C_{7}H_{6}O_{3} (salicylic acid) + 2CO_{2} (Carbon dioxide) + H_{2}O (water)\)

In this reaction, the aspirin molecule breaks down into salicylic acid, carbon dioxide, and water. The reaction is typically catalyzed by heat or exposure to acidic or basic conditions.

Aspirin, or acetylsalicylic acid, contains ester functional groups that can undergo hydrolysis. Under suitable conditions, the ester bond in aspirin is cleaved, leading to the formation of salicylic acid, which is the primary decomposition product. Additionally, carbon dioxide and water are released as byproducts of the reaction.

The balanced equation shows that for every two molecules of aspirin, two molecules of salicylic acid, two molecules of carbon dioxide, and one molecule of water are formed. Understanding the decomposition of aspirin is important in pharmaceutical and chemical industries to ensure the stability and shelf-life of the compound, as well as to study its breakdown products and potential side reactions.

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Answer:

Be replacement

Explanation:

srry they delted my answer before:( someone from brainly all i did was added a link for a quizlet that would help you.. :(

Answer:

Be

Replacement

Explanation:

True. Electrolysis can be used to resolve hydrogenation pathways at palladium surfaces in a membrane reactor. It uses electro catalytic palladium membrane reactor.

Palladium surface membrane reactors use electricity to hydrogenate organic molecules at ambient temperature and pressure. These reaction conditions position ePMRs as a sustainable alternative to thermochemical hydrogenation which requires high-temperature and high-pressure reaction conditions. The electro catalytic palladium membrane reactor uses electrolysis and a hydrogen-selective palladium membrane to deliver reactive hydrogen to a catalyst surface in an adjacent compartment for reaction with an organic substrate. This process forms the requisite metal-hydride surface for hydrogenation chemistry but at ambient temperature and pressure and without a H2 source.

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Answer:  **

H-N-H

   |

  H

Explanation:

Look at a periodic table to determine how many electrons you need to account for. Hydrogen (H) only has 1 electron, while Nitrogen (N) has 5. We have three Hydrogen atoms and one Nitrogen atom, so the total number of electrons will be 3 * 1 + 5 = 8 e-.

Now, place the center atom, which will be Nitrogen and place the three Hydrogens on three sides of it as above in the answer. You should use single bonds for this. Each single bond is a pair of electrons, so since we have three single bonds so far, we have accounted for 2 * 3 = 6 electrons. However, we need 2 more electrons for the total of 8. We put these electrons in as a lone pair above Nitrogen.

We check to see if everything follows the octet rule: Nitrogen has three single bonds, so that's 6 e-, as well as one lone pair, so that's another 2 e- for a total of 8 e-. Check. Now look at Hydrogen: H is the only element whose full orbital is 2 e-. Each H has a single bond with Nitrogen, so each does have 2 e-.

Thus, we know this is the correct diagram, and we are done.

Explanation:

A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons. So ,the correct answer is option C.

The correct Lewis structure for ammonia (\(NH_3\)) is option C. It shows a bond line structure with three hydrogen atoms (H) bonded to a central nitrogen atom (N) in a linear plane.

One hydrogen atom branches upward from the plane. Additionally, the nitrogen atom in this structure has two dots at its bottom, indicating a lone pair of electrons. This arrangement follows the octet rule, as nitrogen has formed three covalent bonds with hydrogen, completing its valence shell. The lone pair on nitrogen gives ammonia its characteristic properties.

Thus, option C accurately represents the Lewis structure of ammonia, showing the bonding and lone pair arrangement of its atoms.

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This question is describing two chemical equations whereby the concentration of ammonia has to be determined. The first reaction is between 25.00 mL of ammonia and 50.00 mL of 0.100-M HCl whose excess was neutralized with 21.50 mL of 0.050-M Na₂CO₃ and thus, the concentration ammonia in the cloudy solution was determined as 0.114 M.

First of all we need to go over the titration of the excess HCl with Na₂CO₃ by writing the chemical equation it takes place when they react:

\(2HCl+Na_2CO_3\rightarrow 2NaCl+CO_2+H_2O\)

Whereas the mole ratio of HCl to Na₂CO₃ is 2:1 and the volume of the HCl leftover is determined as follows:

\(V_{HCl}^{leftover}=\frac{2*0.050M*21.50mL}{0.100M} =21.5mL\)

Next, we infer that the consumed volume of HCl by the ammonia solution was:

\(V_{HCl}^{consumed}=50.00mL-21.50mL=28.5 mL\)

Then, we write the chemical equation that takes place between ammonia and HCl:

\(HCl+NH_3\rightarrow NH_4Cl\)

Whereas the mole ratio is now 1:1, which means that the concentration of ammonia was:

\(M_{NH_3}=\frac{28.5mL*0.100M}{25.00mL}\\\\ M_{NH_3}=0.114M\)

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When two iron bars at different temperatures are placed in thermal contact, the rate of heat exchange can vary depending on whether the system is isolated or open.

If the iron bars were placed in thermal contact in an open system instead of an isolated system, the results would be different due to the exchange of energy with the surroundings. In an open system, energy can be transferred between the system and the surroundings, typically in the form of heat.

When the iron bars are in thermal contact, heat will flow from the hotter bar to the cooler bar until they reach thermal equilibrium. In an open system, the heat transferred from the hotter bar will not be retained within the system but will instead be dissipated into the surroundings. Similarly, the cooler bar will absorb heat from the surroundings. This continuous exchange of heat with the surroundings will affect the rate of temperature change in the bars.

In the given scenario, where the room temperature is 25°C, when the iron bars are in contact, the hotter bar at 200°C will lose heat to the surroundings, and the cooler bar at 120°C will absorb heat from the surroundings. This heat exchange with the surroundings will slow down the rate at which the bars reach thermal equilibrium.

Therefore, in an open system, after 30 minutes of thermal contact, the iron bars may not reach the exact temperature of 160°C as they did in the isolated system. The final temperature of the bars would depend on the rate of heat exchange with the surroundings and the difference in temperature between the bars and the surroundings.

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Answer and explanation

We are asked to calculate the partial pressure of each gas given the mass of the gasses

We can do this as follows

For H2

Mols = 3.93g/2.016 g/mol

= 1.95 mols

For NO

Mols = 38.4 g/ 30.01 g/mol

= 8.31 mols

the total number of mols then becomes:

8.31 + 1.95 =

10.26

and the mol fraction of each gas is determined by dividing the number of mols of that gas by the total number of mols

for H2 = 1.95/10.26

= 0.190

for NO = 8.31/10.26

= 0.809

now that we have the mols we can determine the pressures exerted by each gas by multiplying the total pressure by the mol fraction of each gas

for H2 the partial pressure is:

P(H2) = 3.01 atm x 0.190

= 0.572 atm

for NO the partial pressure is:

P(NO) = 3.01 atm x 0.809

= 2.44 atm

Answer:

When a molecule absorbs infrared radiation,transition s occur from the ground vibrational state to an excited vibrational state. For a molecule to be IR active there must be a change in dipole moment as a result of the vibration that occurs when IR radiation is absorbed.

Answer: It is true about the type of reaction that it is a single replacement reaction, and the cations in the two ionic compounds are different.

Explanation:

When one element in a compound is replaced by another element in a chemical reaction then it is called a single replacement reaction.

For example, \(K + NaCl \rightarrow KCl + Na\)

Here, potassium metal is replacing the sodium metal in the sodium chloride compound.

As metals become cation by losing an electron in a chemical reaction.

Thus, we can conclude that it is true about the type of reaction that it is a single replacement reaction, and the cations in the two ionic compounds are different.

Answer: Its A

Explanation:

a single replacement reactions, and the ANIONS in the two ionic compounds are different

Answer: Positive environmental changes.

Explanation: Without many humans around, the environment has been getting better as more sea life have been spotted in places they haven't been for decades, as well as clearer waters and less rubbish about. Pollution levels have dropped as there are barley any planes in the sky and not many cars about.

Answer:

honestly,i can say that socially being away from people reduces stress

Explanation:

The standard reaction Gibbs free energy (ΔGrxn°) using the given partial pressures is -60,200 J/mol.

Energy is the ability to do work, whether it be in the form of heat, light, electrical, chemical, nuclear, or mechanical energy. It is the capacity to move, change, or transform matter, and is essential for all processes of life.

ΔGrxn = -RT ln Kp
Where R is the universal gas constant (8.314 J/mol K) and T is the temperature (25°C).
Therefore, ΔGrxn = -(8.314)(298) ln (2.26 x 10⁴)
= -20,067 J/mol
Now we need to calculate the standard reaction Gibbs free energy (ΔGrxn°) using the given partial pressures:
ΔGrxn° = ∑nΔGrxn°products - ∑nΔGrxn°reactants
ΔGrxn°products = -RT ln (PCH₃OH)
= -(8.314)(298) ln (1.0)
= 0 J/mol
ΔGrxn°reactants = -RT ln (PCO) - 2(RT ln (PH2))
= -(8.314)(298) ln (0.010) - 2(8.314)(298) ln (0.010)
= -60,200 J/mol
Therefore, ΔGrxn° = ∑nΔGrxn°products - ∑nΔGrxn°reactants
= 0 - (-60,200)
= -60,200 J/mol
Finally, ΔGrxn = ΔGrxn° + RT ln Q
= -60,200 + (8.314)(298) ln (1.0)
= -60,200 J/mol.

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The synthesis reactions are generally exothermic. They release energy in the form of heat and light. In such reactions new compounds are found to be formed. Among the given options, none are synthesis reaction. So the given options are incorrect.

A reaction in which multiple reactants combine together to form a single product is defined as the synthesis reaction. It is a chemical reaction in which two or more simple substances combine to form a more complex compound.

1. H₂ + Br₂ → 2HBr = Redox reaction

2. 2H₂O + 2Na → 2NaOH = Redox reaction

3. NaCl → Na+ + Cl = Dissociation

4. Mg + H₂SO4 → MgSO4 + H₂​ = Single replacement

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