Highly toxic disulfur decafluoride decomposes by a freeradical process: S₂F₁₀(g) ⇒ SF₄(g) + SF₆(g). In a study of the decomposition, S₂F₁₀ was placed in a 2.0-L flask and heated to 100°C; [S₂F₁₀] was 0.50 M at equilibrium. More S₂F₁₀ was added, and when equilibrium was reattained, [S₂F₁₀] was 2.5 M. How did [SF₄] and [SF₆] change from the original to the new equilibrium position after the addition of more S₂F₁₀?

Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

What are Molecules ?

Molecules are the combination of two or more different atoms combine in a fixed ratio.

Molecules can be independently founded.

Atoms are always founded in combined state and does not occurs independently except rare earth elements which belongs to 18th group of periodic table.

Chemicals are taken in compound state But they undergo chemical reaction individually in molecular level.

Hence, Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

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A near-azeotropic refrigerant blend is a mixture of two or more refrigerants that have similar boiling points and vapor pressures, resulting in a composition that behaves like a single fluid. These blends are designed to offer improved performance and efficiency compared to single-component refrigerants.

Two examples of near-azeotropic refrigerant blends are R-410A and R-404A.

R-410A is a blend of difluoromethane (R-32) and pentafluoroethane (R-125), which has replaced R-22 as a popular refrigerant for air conditioning systems due to its superior efficiency and environmental properties.

R-404A is a blend of tetrafluoroethane (R-134a), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-143a), which is commonly used in commercial refrigeration applications such as supermarkets and convenience stores.

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When \(CO_{2}\) and \(H_{2} CO_{3}\) are both horizontal lines, the rate of the forward reaction is the same as the rate of the reverse reaction. The reaction is occurring at equilibrium, with no net change in the concentrations of reactants and products over time.

When the concentration of carbon dioxide \(CO_{2}\) and the concentration of carbonic acid \(H_{2} CO_{3}\) are both horizontal lines, it indicates that their concentrations remain constant over time. In such a scenario, the rate of the forward reaction is the same as the rate of the reverse reaction. A horizontal line on a concentration-time graph suggests that the concentrations of the reactants and products are not changing, implying that the reaction has reached equilibrium. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. This is a fundamental principle of chemical equilibrium, described by the principle of microscopic reversibility.

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The temperature of the bromine reaction mixture during reflux, it typically depends on the boiling point of the solvent being used.

For example, if the solvent is chloroform, the reflux temperature would be around 61-62°C. If the solvent is carbon tetrachloride, the reflux temperature would be around 76-77°C.

As for the condenser, a water condenser is typically used during reflux to prevent the loss of solvent and/or reagents due to evaporation. Air condensation is not likely to be sufficient, especially for reactions that require longer reflux times.

Regarding the bromination of alkenes, the substituents do remain on opposite sides of the molecule after the reaction, resulting in a trans product. The absolute configurations of the carbons depend on the starting configuration of the alkene. For example, if the starting alkene is (Z)-2-butene, the product of bromination would be (2R,3S)-2,3-dibromobutane, as shown in the following diagram:

   H     Br

   |     |

H -- C=C -- C -- H

   |     |

   Br    H

Note that the stereochemistry of the product is determined by the anti-addition mechanism of bromination, which results in the formation of a meso compound with two chiral centers.

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Answer:  The bonds that are made and broken in a reaction release energy when forming products that contain less total energy than the reactants.

Explanation:  Elements form bonds with each other when the total energy of the resulting products is less than the starting energy.  The term "energy" refers to the energy of the electrons that are being held in an atom by the nucleus.  Keeping the positively charged nucleus happy means that the electrons are trying to get closer, but they repel each other as they get closer to the nucleus.  This results in orbits, preferred areas around the nucleus where the electrons spend their day in a delicate balance with the nucleus and other electrons.  These orbits offer housing for the electrons that involve discreet energies for the electrons.  When elements react, the resulting bonding pattern often results in an overall reduction in total energy.  The energy reduction results in heat, light, and/or sound.  The release is termed "exothermic."

Answer:

If it has to do with heat, it's thermal. ... The Greek word therme, meaning “heat,” is the origin of the adjective thermal. Something that is thermal is hot, retains heat, or has a warming effect.

Explanation:

hope it helps :)

Answer:

energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another. ... For example, any given body has kinetic energy if it is in motion.

Explanation:

please mark my answer in brainlist

Answer:

Meiosis is the anwer

Explanation:

meiosis

The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition. The density of aluminum in g/cm³ is 2.70 g/cm³.

A substance's density is a measurement of how heavy it is in relation to its size. If an object is placed in water, it will float if it is less dense than the water, and it will sink if it is more dense. The density of a material is a distinguishing quality that is independent of the substance's volume.

The volume of the metal =315 cm³

Then density is:

Density = mass /volume

Density of metal = 851 g / 315cm³

D = 2.70 g / cm³

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White dwarf spectra can be compared to fingerprints in several ways. Like fingerprints, each white dwarf spectrum is unique and can be used to identify and distinguish one white dwarf from another.

Additionally, just as fingerprints provide valuable information about an individual's identity, white dwarf spectra offer important insights into the physical properties, composition, and evolutionary history of the white dwarf. White dwarf spectra, obtained through the analysis of light emitted or absorbed by these stellar remnants, exhibit characteristic patterns and features that are specific to each white dwarf. Similar to how fingerprints are unique to individuals, the distinct features in white dwarf spectra allow astronomers to identify and classify different white dwarfs, distinguishing them based on their chemical composition, temperature, surface gravity, and other physical properties. By examining the spectra, scientists can learn about the elements present in the white dwarf's atmosphere, study its internal structure, and gain insights into its evolutionary path, providing valuable information for understanding stellar evolution and the life cycles of stars.

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The total amount of energy necessary to break apart 2 moles of H2 molecules and 1 mole of O2 molecules is 1370 kJ.

To calculate the total amount of energy required to break apart 2 moles of H2 molecules and 1 mole of O2 molecules, we need to consider the bond dissociation energy of each type of bond.
1. H2 molecule has one H-H bond with a bond dissociation energy of approximately 436 kJ/mol.
2. O2 molecule has one O=O double bond with a bond dissociation energy of approximately 498 kJ/mol.
Step 1: Calculate the energy required to break H2 molecules.
Energy for H2 = 2 moles * 436 kJ/mol = 872 kJ
Step 2: Calculate the energy required to break O2 molecules.
Energy for O2 = 1 mole * 498 kJ/mol = 498 kJ
Step 3: Add the energies calculated in steps 1 and 2 to find the total energy.
Total energy = Energy for H2 + Energy for O2 = 872 kJ + 498 kJ = 1370 kJ
The total amount of energy necessary to break apart 2 moles of H2 molecules and 1 mole of O2 molecules is 1370 kJ.

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The citric acid cycle is an aerobic process. The major reactants in the citric acid cycle are acetyl-CoA, NAD+, GDP, and FAD. In the citric acid cycle, acetyl-CoA is cleaved to produce NADH and FADH2. This applies to the citric acid cycle.

The citric acid cycle serves as the mitochondrial hub for the final step of carbon-skeletal oxidative catabolism for carbohydrates, amino acids, and fatty acids. Each oxidation step in turn reduces coenzymes such as nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FADH2). The enzyme rearranges the atoms of the citric acid molecule (6 carbons) into a new 6 carbon configuration. Energy is released when a six-carbon array is oxidized and one carbon is removed.

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Answer:

speed inscreases mass decrreases, but when no friciton mass dont matter

Explanation:

Mass does not affect speed directly, but it does affect how fast an object can change its speed by accelerating or decelerating. Objects with larger masses require more time for acceleration or deceleration compared to lighter objects. The law of inertia states that objects that are still remain still and that objects in motion remain in motion regardless of the object's mass.

Answer:

The sublimation of iodine at 25.0°C, which is the process of iodine transitioning from solid to gas phase with no liquid phase in between, can be described as an endothermic process. This is because the transition requires the absorption of energy in order to break the intermolecular attractions holding the solid together and to overcome the intermolecular forces holding the gas molecules apart. Therefore, this process absorbs heat from the surrounding environment, which results in a decrease in temperature. This is why solid iodine is often used as a freezing mixture to cool thermally insulated coolers that store food and drinks.

If 50 g of potassium nitrate is added to 100 g of water at 30 degrees Celcius, 30 gram of potassium nitrate will not dissolve.

A solubility curve is a curve that is produced when the amount of solute that dissolves in a given volume of solvent is plotted against the temperature of the solution formed.

A solubility curve can be used to predict the amount of a given solute that will dissolve in a given amount of solvent at a particular temperature.

The solubility curve of potassium nitrate is shown in the attachment.

At 30°C, the solubility of potassium nitrate is 20 g/100 g of water.

Hence, the amount of potassium nitrate that will remain undissolved when 50 g of it is added to 100 g of water at 30°C will be:

Amount left undissolved = 50 - 20 g

Amount left undissolved = 30

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Answer:

The pituitary gland is located below the brain. :)

Answer:

Explanation:

The Tacoma Narrows Bridge is the historical name given to the twin suspension bridge—originally built in 1940—that spanned the Tacoma Narrows strait. It collapsed just four months later due to aeroelastic flutter. Since then, this topic has become popular, with several case studies discussing the failure phenomenon of suspension cable bridges.

In the state of Washington, the construction of the Tacoma Narrows Bridge was completed and opened to the traffic on July 1st, 1940. It was the very first bridge to incorporate a series of plate girders as roadbed support, and the first bridge of its type (cable suspension). It was also the third largest suspension bridge of its time, with a 2800-foot central span and two side spans of 1100 feet each.

A west-side approach had a continuous steel girder of 450ft, while the east side had a long reinforced concrete frame of 210ft.  It had two cable anchorages of 26ft. along roadways, two 5ft. sidewalks and two 8ft. deep stiffening girders. Among several other structural details, the suspension cable anchorages to which the cables were connected were made of 20,000 cubic yards of concrete, 6 lakh pounds of structural steel, and 2.7 lakh pounds of reinforcing steel. Because of its extremely long length, it was considered a ‘narrow bridge’. The overall construction cost was estimated to be a whopping $6 Million in 1940. Considering inflation, this is equivalent to almost $1 Billion, and all of this for something that lasted just four months and seven days. Yet, this remains a great engineering feature for civil engineers to ponder over.

Answer:

8 mol of hydrogen will react with 1 mol of sulfur.

Explanation:

We'll begin by writing the balanced equation for the reaction.

This is given below:

8H2 + S8 —> 8H2S

Now, let us carefully observe the mole ratio of the reactants.

This is illustrated:

The mole ratio of the reactants ( i.e H2 and S8) is 8 : 1

From the balanced equation above,

We can thus, concluded that:

8 moles of H2 will reacted with 1 mole of S8.

Answer:

b

Explanation:

edge 2021

Answer:

KCI

Explanation:

Answer: 526 grams of Ag3PO4.

Explanation:

First, we need to calculate the number of moles of Silver Nitrate (AgNO3) present in 245 grams:

245 g AgNO3 / 169.88 g/mol AgNO3 = 1.444 mol AgNO3

The balanced chemical equation for the reaction between AgNO3 and Ag3PO4 is:

3 AgNO3 + Ag3PO4 → 3 Ag3PO4 + NO3

We can see that for every 3 moles of AgNO3 reacted, we get 1 mole of Ag3PO4 produced. Therefore, the number of moles of Ag3PO4 produced is:

1.444 mol AgNO3 / 3 mol AgNO3 per 1 mol Ag3PO4 = 0.481 mol Ag3PO4

Finally, we can use the molar mass of Ag3PO4 to convert from moles to grams:

0.481 mol Ag3PO4 × 418.58 g/mol Ag3PO4 = 201.18 g Ag3PO4

Therefore, 245 grams of AgNO3 will produce 201.18 grams of Ag3PO4.

Answer:

Molecules in solids are tightly packed because the atoms are freezed together. Molecules in liquids are loosely packed because atoms are broken down and can move anywhere. Molecules in gases are free; the atoms can move or spread anywhere.

Solids do not move; hence no speed.

Liquids move and slide past past each other.

Gases move freely at high speeds

The R value for air under STP, based on density and the average molar mass, is approximately 287.058 J/kg·K.

To calculate the R value based on the density and average molar mass of air under Standard Temperature and Pressure (STP).
First, let's establish the necessary information. At STP, the temperature is 273.15 K and the pressure is 1 atm (101.325 kPa). The average molar mass of air is approximately 28.97 g/mol. To calculate density at STP, we'll use the equation:
Density (ρ) = (P × M) / (R × T)
where P is pressure, M is molar mass, R is the gas constant, and T is temperature. We want to find R, so let's rearrange the equation:
R = (P × M) / (ρ × T)
Next, we need to find the density of air under STP. We can use the Ideal Gas Law:
PV = nRT
where V is volume and n is the number of moles. The density (ρ) can be expressed as:
ρ = m/V = (n × M) / V
Combining the two equations and solving for ρ, we get:
ρ = (P × M) / (R × T)
We have P, M, and T, so we can calculate ρ:
ρ = (101.325 kPa × 28.97 g/mol) / (8.314 J/mol·K × 273.15 K) ≈ 1.225 kg/m³
Now we can calculate R using the equation we derived earlier:
R = (101.325 kPa × 28.97 g/mol) / (1.225 kg/m³ × 273.15 K) ≈ 287.058 J/kg·K

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To find the moles present in 83.20 grams of manganese we must use the molar mass of manganese. This mass is equal to 54.94g/mol. So the moles of manganese (Mn) will be:

Answer: 83.20 grams of manganese are equivalent to 1.51 moles

As it is less than 7, solution A, with a pH of 6, is acidic, whereas solution B, with a pH of 8, is basic.

In contrast to solution B, which is basic in nature, acidic solution A has a higher concentration of hydrogen ions.

A is therefore an acid and B is a base.

How does pH work?

hydrogen's potential noun. the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimeter of solution; a measure of a solution's acidity or alkalinity. A pH of 7 refers to pure water, a pH of less than 7 to acid solutions, and a pH of more than 7 to alkaline solutions.

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As it is less than 7, solution A, with a pH of 6, is acidic, whereas solution B, with a pH of 8, is basic.

In contrast to solution B, which is basic in nature, acidic solution A has a higher concentration of hydrogen ions.

A is therefore an acid and B is a base.

How does pH work?

hydrogen's potential noun. the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimeter of solution; a measure of a solution's acidity or alkalinity. A pH of 7 refers to pure water, a pH of less than 7 to acid solutions, and a pH of more than 7 to alkaline solutions.

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Answer:NH4, because nitrogen needs four electrons, and each hydrogen needs one electron.

Explanation:

Answer:

any factor in the environment that does not

depend on the number of members in a

population.

Explanation:

Density independent limiting factors also cause

population sizes to increase. For example, the

water from a flash flood increases the growth

of vegetation, thereby providing more food for

primary consumers in the ecosystem.

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Answer:

search ur question on brainly and you will see some one already asked that question and some one answered it

Answer:

1. Cerium

2. Iodine

3. Potassium

4. Lead

5. Boron

6. Calcium

7. Krypton

8. Einsteinium

Explanation:

Hope it helped!

the terminal speed of the skydiver falling feet first is approximately 64.8 m/s.

To find the terminal speed of the skydiver, we can use the following formula:

v_t = \(\sqrt{(2mg)/p(AC_d)}\)

where:

v_t is the terminal speed

m is the mass of the skydiver

g is the acceleration due to gravity (9.81 )

rho is the density of air

A is the cross-sectional area of the skydiver

C_d is the drag coefficient

First, we need to convert the dimensions of the skydiver from centimeters to meters:

length (l) = 170 cm = 1.7 m

width (w) = 38 cm = 0.38 m

height (h) = 24 cm = 0.24 m

The cross-sectional area A of the skydiver can be calculated as the product of its width and height:

A = w * h = 0.38 m * 0.24 m = 0.0912 \(m^{2}\)

Next, we can calculate the mass of the skydiver:

m = 72 kg

We are given the drag coefficient C_d as 0.80, and the density of air rho as 1.2 kg/\(m^{3}\)

Plugging all the values into the formula, we get:

= \(\sqrt{(2*72kg*9.81 m^{2})/(1,2kg/m^{3}*0.0912m^{2} *0.80))\)

= 64.8 m/s

Therefore, the terminal speed of the skydiver falling feet first is approximately 64.8 m/s.

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