NEED HELP
The system at equilibrium below is cooled.
How does the system adjust to reestablish
equilibrium?
2NO(g) + O₂(g) = 2NO₂(g) + 113.06 kJ
A. The reaction will not change because it was already at
equilibrium.
B. The reaction will shift toward the products (right) and
decrease the concentrations of NO and O2.
C. The reaction will shift toward the reactants (left) and
increase the concentration of O2.
D. The reaction will shift toward the reactants (left) and
increase the concentration of NO2.

Answer: 20 , 40

I want know the answer now !

Elements in group 18 have a np6 electron configuration in the outer shell.The elements in group 18 are known as noble gases because they are inert (non-reactive) due to their electronic configurations.

The electronic configuration of all noble gases follows a pattern of ns²np⁶ (where n is the energy level) in their outermost shell.The ns²np⁶ electronic configuration is indicative of having a completely filled p orbital. Since the p orbital can accommodate six electrons, the noble gases have a completely filled outer shell with eight valence electrons, giving them remarkable stability in nature. This stability is the reason why they are unreactive and do not typically form compounds. In addition, because they have a complete outer shell, they are less likely to lose or gain electrons to form ions and enter into chemical reactions.In conclusion, elements in group 18 have a np6 electron configuration in the outer shell.

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The functional group with the COOH setting is called Carboxylic acid, which is a type of organic acid, whereas Esters will have COOR representation, Aldehydes wl l be OCH and Alcohols OH, therefore the answer will be number 4

Answer:

I'm sorry, but I don't see an equation in your question to provide a specific answer. However, I can answer your general question.

Nitrogen has one more proton than Carbon because it has one more positively charged particle (proton) in its nucleus. This difference in the number of protons determines the atomic number and identity of the element.

Protons can only come from the nucleus of another atom, through a nuclear reaction. In nature, nitrogen is usually created by nuclear fusion in stars, where lighter elements combine under high pressure and temperature to form heavier elements.

Regarding the second part of your question, without the specific equation you are referring to, I cannot determine the type of reaction depicted. There are many types of chemical reactions, including synthesis, decomposition, combustion, acid-base, and redox reactions, among others.

Answer:

1 kPa = 760/101.325 = 7.5 mmHg; atm = atmosphere; kPa = kilo Pascal; mmHg = millimetres of mercury.

Answer:

5,000

Explanation:

ed2021

Exothermic reactions release heat when the reactants produce products. The process of respiration is an exothermic reaction as it releases heat. Thus, option D is correct.

An exothermic is a type of reaction that involves the release of heat during the reaction through product formation. The respiration reaction is exothermic as it involves the breakdown of oxygen and glucose into energy.

Thermal decomposition is an endothermic reaction as it requires energy for completion. Similarly, photosynthesis and reaction between ammonium nitrate and water are endothermic reactions as they also require energy from the external source.

Therefore, respiration is an exothermic reaction.

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Based on the chemical equation of the reaction, S (sulfur) was oxidized and N (nitrogen) was reduced.

The correct option is C.

A redox reaction is a name for a reduction-oxidation reaction.

In a redox reaction, oxidation and reduction occur during the reaction.

Oxidation involves a loss of electrons and results in an increase in the oxidation number of the oxidized species.

Reduction involves a gain of electrons and results in a decrease in the oxidation number of the reduced species.

Considering the given equation of reaction:

3 SO₂ + 2 HNO₃ + 2 H₂O → 3 H₂SO₄ + 2 NO

The oxidation number of nitrogen changes from +5 in HNO₃to +2 in NO. Hence, it is reduced.

The oxidation number of sulfur changes from +4 tin SO₂ to +6 in H₂SO₄. Hence it is oxidized.

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Overall, the food groups can you find the richest food sources of phosphorus are Protein and dairy.

A spread of meals evidently includes phosphorus, and the richest sources are dairy, pork, hen, seafood, legumes, and nuts. Phosphorus from those meals is called organic phosphorus. it's far absorbed greater efficiently from animal foods than plant meals.

Phosphorus is most commonly observed in rock formations and ocean sediments as phosphate salts. Phosphate salts which are released from rocks via weathering generally dissolve in soil water and can be absorbed by way of flowers.

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Answer:

I dont understand what is the question you need help on-

Explanation:

c. Direct calorimetry (a measure of heat released when food is burned) measures the potential energy in food.

Direct calorimetry is a method used to measure the energy content of food by directly burning it and measuring the heat released. This technique provides a measure of the potential energy contained within the food.

Option a is incorrect because direct calorimetry can determine the energy value of alcohol, as it measures the heat released during combustion.

Option b is incorrect because a bomb calorimeter measures the heat released during combustion, not the oxygen consumed.

Option d is incorrect because the physiological fuel value of a food is typically lower than the energy value determined by direct calorimetry. This is due to the inefficiencies in the human body's energy utilization process, such as incomplete digestion and absorption of nutrients.

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Answer:

:)

Explanation:

Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.

Answer:

H2O

Explanation:

Thats the formula :P

A common rock that can be dissolved easily by water and weak acids will be " limestone".

Pure quartz sandstone must have been originally transformed into the hard, un-foliated metamorphic rock known as quartzite. Quartzite is created from sandstone by heating it under pressure, typically caused by tectonic compression in orogenic zones.

The majority of caves occur in limestone terrain. Because a very moderate carbonic acid may dissolve the mineral grains of limestone in nature, limestone is unusual. Water from rain as well as carbon dioxide as from air and also the soil combine to make the weak acid.

Therefore, the correct answer will be option (c).

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The false statements from the given choices are c. The delta S is positive and d. The delta S_univ is positive. These statements are not true because the spontaneity of a chemical reaction depends on the Gibbs free energy change, which is given by the formulaΔG = ΔH - TΔS, where ΔH is the enthalpy change, T is the temperature in Kelvin, and ΔS is the entropy change.

The Gibbs free energy change is negative for a spontaneous reaction and positive for a non-spontaneous reaction. Thus, a spontaneous reaction occurs when ΔG < 0, which can happen in the following cases:

The products are lower in energy than reactants (ΔH < 0).

The reaction releases heat (ΔH < 0), making the system more stable and causing the entropy to increase (ΔS > 0).

Both of these factors contribute to a negative ΔG, making the reaction spontaneous. However, a reaction that is exothermic or has a positive entropy change is not necessarily spontaneous. For example, melting ice is an endothermic process that has a positive entropy change but is non-spontaneous at temperatures below the melting point.

Therefore, the false statements are c. The delta S is positive and d. The delta S_univ is positive.

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Making a solution of sodium chloride for an experiment , we add 250 mg of sodium chloride to 500 ml of lab water. the sodium chloride concentration of solution in unit of mg/l is 499.7 mg/l and in ppm is 499.7 mg/l.

mass of solute = 250 mg = 0.250 g

volume of solvent = 500 ml = 500 g

mass of solution  = 0.250 g + 500 g = 500.25 g

concentration of solution in ppm ( parts per million ).m

= ( mass of solute in g / mass of solution in g  ) × 1000000

= ( 0.250 g / 500.25 g) × 1000000

= 499.7 ppm

so, we know that , 1 ppm is equivalent to 1 mg /l

1 ppm = 1 mg/l

Therefore, 499.7 ppm = 499.7 mg / l.

thus,Making a solution of sodium chloride for an experiment , we add 250 mg of sodium chloride to 500 ml of lab water. the sodium chloride concentration of solution in unit of mg/l is 499.7 mg/l and in ppm is 499.7 mg/l.

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The length of the dollar bill is 157 millimeters.

To calculate the length of the dollar bill in millimeters, we need to convert the length from meters to millimeters.
1 meter = 1000 millimeters
So, the length of the dollar bill in millimeters can be calculated by multiplying the length in meters by 1000.
Length of dollar bill in millimeters = 0.157 meters x 1000 = 157 millimeters
Therefore, the length of the dollar bill is 157 millimeters.

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Answer:

B?

Explanation:

okay so honestly i think its b, but dont get me wrong, im not smart

Energy required : 69834 J

The heat to change the phase can be formulated :  

Q = mLf (melting/freezing)  

Q = mLv (vaporization/condensation)  

Lf=latent heat of fusion  

Lv=latent heat of vaporization  

The heat needed to raise the temperature

Q = m . c . Δt

30.9 g of water at 100.0 degrees C is converted to steam

Lv=latent heat of vaporization  for water = 2260 J/g

Heat required (phase change water to steam at 100 C)

\(\tt Q=m.Lv\\\\Q=30.9\times 2260\\\\Q=69834~J\)

Answer:

C rusting iron

Explanation:

water evaporating and melting is an example of physical change it doesn't change the H2O composition of the atoms, rubbing water on paper doesn't change any atoms or molecules. so the only answer that leaves is rusting iron because when an iron nail comes into contact with water and is then exposed to the air, it rusts, forming a brown-red substance. This process changes the chemical composition of the original substance.

Answer:

co + H2 it is the answer may it helpfull

Answer:

d

Explanation:

because CO mixes with H2O

Answer:

Is that all in the Image take a bigger pic

Explanation:

Answer:

Name: Sodium Thiosulfate Pentahydrate.

Formula: Na2S2O3.5H2O.

Molar Mass: 248.1841.

Explanation:

Hope this helps :D

and feel free to click that thanks button

The internal energy change and temperature change for the two processes involving 1 mole of an ideal monatomic gas for (a) ΔU = 3200 J, ΔT = 256.7 K and for (b) ΔU = -3200 J, ΔT = -256.7 K.

The internal energy change and temperature change for the two processes involving 1 mole of an ideal monatomic gas  can be computed using the following formula:

ΔU = Q - W

Where ΔU is the internal energy change, Q is the heat added or taken away from the gas, and W is the work done by or on the gas.

For process (a), 3200 J of heat are added to the gas and the gas does no work and no work is done on the gas. Therefore, the internal energy change is:

ΔU = Q - W = 3200 J - 0 = 3200 J

The temperature change can be computed using the following formula:

ΔT = ΔU / (n * Cv)

Where ΔT is the temperature change, ΔU is the internal energy change, n is the number of moles of gas, and Cv is the molar heat capacity at constant volume.

For an ideal monatomic gas, Cv = 3/2 R, where R is the gas constant. Therefore, the temperature change is:

ΔT = 3200 J / (1 mol * 3/2 * 8.314 J/mol*K) = 256.7 K

For process (b), 3200 J of work are done on the gas and the gas does no work and no heat is added or taken away from the gas. Therefore, the internal energy change is:

ΔU = Q - W = 0 - 3200 J = -3200 J

The temperature change can be computed using the same formula as above:

ΔT = -3200 J / (1 mol * 3/2 * 8.314 J/mol*K) = -256.7 K

Therefore, the internal energy change and temperature change for the two processes are:

(a) ΔU = 3200 J, ΔT = 256.7 K
(b) ΔU = -3200 J, ΔT = -256.7 K

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Given the Ksp values:

CoS: 5.9×10⁻²¹

Cu(OH)₂: 1.6×10⁻¹⁹

Ca₃(PO₄)₂: 1.0×10⁻²⁵

Relative solubility refers to the comparison of the solubility of different substances or compounds in a given solvent. It is a measure of how much of a particular substance can dissolve in a solvent under specific conditions.

Comparing the values, we find that:

CoS has the lowest Ksp value (5.9×10⁻²¹), indicating the lowest solubility.

Cu(OH)₂ has an intermediate Ksp value (1.6×10⁻¹⁹), indicating intermediate solubility.

Ca₃(PO₄)₂ has the highest Ksp value (1.0×10⁻²⁵), indicating the highest solubility.

Therefore, the relative solubities are as follows:

CoS < Cu(OH)₂ < Ca₃(PO₄)₂

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Answer:

light intensity

Explanation:

Answer:

The main component are electrons.

A chemical bond is any attractive interaction that keeps atoms short. This interaction can be directional as the bond between two atoms within a molecule, or non-directional as the electrostatic interaction that keeps the ions of an ion crystal in contact. It can be strong like the two previous examples, or weak as van der Waals interactions that are dipolar in nature.

Many models exist to describe these interactions. For example, the chemical bond between two atoms within a molecule can be described with the Lewis model or with a quantum model, like the theory of molecular orbitals. In both cases, the origin of the interaction is a sharing of electrons between the two partner atoms of the chemical bond.

There are three types of chemical bonds: single bonds, double bonds, and triple bonds. Indeed, the type of chemical bond depends on the number of electrons shared between the bound atoms:

* Simple bonds have 2 shared electrons.

* Double bonds have 4 shared electrons.

* Triple bonds have 6 shared electrons.

This number of electrons shared between the atoms depends on the electronic structure of these atoms and thus on the rules of the byte and the duet.

According to the illustration, the factors that influence the gravitational attraction between two objects would be mass and distance. Option A.

The gravitational attraction between two objects is determined by two factors: their masses and the distance between them.

This is due to the inverse square law, which states that the force between two objects is proportional to the inverse square of the distance between them.

Therefore, the correct answer is mass and distance.

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Answer:it is A

Explanation:

Out of the two chair conformations of methanol the first chair conformation of menthol, with the hydroxyl group in the equatorial position, is more stable than the second conformation.

Menthol is a cyclic compound with the chemical formula C10H20O. It has one chiral center, which means that it can exist in two different stereoisomeric forms known as enantiomers.

To draw the chair conformations of menthol, we first need to identify the ring structure. Menthol has a cyclohexane ring with a hydroxyl group (-OH) attached to one of the carbons. The carbon with the hydroxyl group is the chiral center, and we will designate it as "C" in the following diagrams.

The two chair conformations of menthol can be drawn as follows:

              H

              |

      H-----C-----H

        \   /  \

         C-----C

        /  \   |

      H     C--H

            |

            H

            H

            |

      H-----C-----H

        /   \   /

       C-----C

       |     /  \

      H     C---H

            |

            H

In the first chair conformation, the hydroxyl group is equatorial (pointing outwards from the ring), while in the second conformation, it is axial (pointing upwards or downwards along the ring). The equatorial position is generally more stable than the axial position, because it minimizes steric hindrance between the hydroxyl group and the neighboring atoms in the ring.

Therefore, the first chair conformation of menthol, with the hydroxyl group in the equatorial position, is more stable than the second conformation.

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The normal boiling point of mercury is approximately 348.3 K.

To determine the normal boiling point of mercury (Hg), we need to compare the enthalpy of formation (ΔHof) and entropy (S) values between the liquid (Hg(l)) and gas (Hg(g)) phases.

Hg(l): ΔHof = 0 (by definition), S = 77.4 J/Kamal

Hg(g): ΔHof = 60.78 kJ/mole, S = 174.7 J/Kamal

The normal boiling point is the temperature at which the liquid phase and gas phase of a substance are in equilibrium, and the Gibbs free energy change (ΔG) is zero. The equation for ΔG is:

ΔG = ΔH - TΔS

At the boiling point, ΔG = 0, so we can set up the equation as follows:

0 = ΔH - TΔS

Rearranging the equation to solve for temperature (T):

T = ΔH / ΔS

Substituting the given values:

T = (60.78 kJ/mold) / (174.7 J/Kamal)

Converting kJ to J:

T = (60.78 * 10^3 J/mold) / (174.7 J/Kamal)

Simplifying:

T ≈ 348.3 K

Therefore, the normal boiling point of mercury is approximately 348.3 K.

By using the relationship between enthalpy, entropy, and temperature through the Gibbs free energy equation, we can determine the boiling point of mercury.

The normal boiling point occurs when the Gibbs free energy change is zero, indicating equilibrium between the liquid and gas phases. By substituting the given enthalpy and entropy values, we can calculate the temperature at which this equilibrium is achieved, giving us the normal boiling point of mercury.

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171.875 pounds of flour and 103.125 pounds of sugar should be ordered.

The pound is defined as the basic unit for weight in the Foot Pound Second (F.P.S) system and is equal to 16 ounces.

To find the amount of flour in pounds we need to find the 62.5%  of 275.

62.5% of 275 = 171.875

To find the amount of sugar in pounds we need to find the 37.5% of 275.

37.5%  of 275 =103.125

Hence, 171.875 pounds of flour and 103.125 pounds of sugar should be ordered.

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