Question 9 (5 points) For the following reaction, the change in free energy, AGº, is 4.15 kJ/mol at 25°C. Determine the equilibrium constant
N204 + 2NO2 a) 1.91 b) 0.19 c) 6.74 d) -1.91

Answer:

1) atomos. 2) uncuttable.

Explanation:

none

Answer:

gain

Explanation:

Answer: 6.45 Joules

Explanation: I just did it

Answer:

9.5

Explanation:

that the answer I hope am correct

Answer:

B). Electrons are more attracted to the oxygen atom, so there is a partial negative charge on the oxygen atom.

Explanation:

The above statement most aptly describes the polarity or uneven distribution of the density of electrons. In water, two hydrogen atoms and one atom of oxygen leading to the formation of polar covalent bonds. Thus, there is the presence of a partial negative charge close to the oxygen atom and partial positive charge near the hydrogen atom as the former has unshared pair of electrons. This polarity of water allows it to dissolve sugar or other ionic substances in it. Thus, option B is the correct answer.

I think by writing electronic configuration.

Another way of representing an atomic model is the use of  periodic table

There  are different ways in which an atom can be modelled  and  some of these methods includes:

All the ways listed above can be used to model/represent an atom graphically ( drawing ). while the periodic table can be used to model an atom into its element without drawing. The periodic table makes use of valance numbers of the atoms and chemical similarities between atoms when modeling an atom.

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Explanation:

At the start of the citric acid cycle, a molecule of oxaloacetate accepts a two-carbon acetyl group from acetyl CoA to form citrate. This reaction kicks off the citric acid cycle; thus, oxaloacetate is required for the cycle to take place.

To begin the citric acid cycle, an oxaloacetate molecule accepts a two-carbon acetyl group from acetyl CoA to form citrate. Because this reaction initiates the citric acid cycle, oxaloacetate is required for the cycle to occur.

The Krebs cycle, also known as the citric acid cycle or TCA cycle, is a chain of reactions that occurs in the mitochondria and is used by almost all living cells to produce energy through aerobic respiration. It consumes oxygen and emits water and carbon dioxide as byproducts.

All aerobic organisms use a series of chemical reactions to generate energy by converting acetate derived from carbohydrates, fats, and proteins into carbon dioxide.

The citric acid cycle involves the attachment of an acetyl group from acetyl CoA to a four-carbon oxaloacetate molecule to form a six-carbon citrate molecule.

Thus, Citrate is oxidized in a series of steps, releasing two carbon dioxide molecules for each acetyl group fed into the cycle.

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Answer:

The molecules tend to speed up and move faster throughout the substance once thermal energy increases. This is evident whenever we heat up water as its molecules tend to move faster throughout the water as thermal energy tends to increase

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Answer: A suspension is a heterogenous mixture containing large particles that will settle on standing. Sand in water is an example of a suspension. A solution is a homogenous mixture of two or more substances where one substance has dissolved the other.

Answer:

C.the Earth’s distance from the sun

Explanation:

Distance Does Not Cause Seasons

It is a common misconception that seasons occur because of Earth's elliptical orbit around the Sun, with winter occurring when Earth is farthest away from the Sun, and summer when it is closest to it. However, our planet's distance from the Sun has little effect on the onset of seasons.

The distance of the earth from the sun does not cause seasonal change. Therefore, option (C) is correct.

The seasons are changing depending on the sunlight reaching the Earth as it orbits around the sun during the year. The season changes are caused by the Earth as it is tilted on its axis. The earth travels each year in a loop around the sun.

The hemisphere of the Earth has tilted towards or away from the Sun. Because of that, there are different types of seasons are formed which are experienced in a whole year.

Summer season occurs on the earth when the hemisphere is tilted towards the sun and winter occurs in the hemisphere tilted away from the sun.

Because sunrays travel directly to the surface of Earth, the hemisphere which is tilted toward the sun is warmer. So they are less scattered in the atmosphere.

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The oxidation state of iron (Fe) is +10 in both Fe(CO)₅ and Fe(CO)₄I₂

In order to determine the oxidation states of the metal species mentioned, we need to consider the charges of the other atoms and the overall charge of the molecule.

Fe: The oxidation state of iron (Fe) can vary depending on the specific compound or complex it is part of. In a neutral compound like Fe, the oxidation state of iron is 0.

Fe(CO)₅: In Fe(CO)₅, the molecule contains five carbon monoxide (CO) ligands. The oxidation state of each carbon in CO is -2, and since there are five CO ligands, they contribute a total of -10. Since the overall charge of the compound is 0, the oxidation state of iron (Fe) can be calculated as follows:

Oxidation state of Fe + (Oxidation state of C) + 5(-2) = 0

Oxidation state of Fe - 10 = 0

Oxidation state of Fe = +10

Fe(CO)₄I₂: In Fe(CO)₄I₂, the molecule contains four carbon monoxide (CO) ligands and two iodine (I) atoms. Similar to the previous example, the oxidation state of each carbon in CO is -2, and each iodine atom has an oxidation state of -1. Therefore, the total contribution from CO ligands is -8, and the contribution from the iodine atoms is -2.

Using the same calculation as before, we can determine the oxidation state of iron (Fe):

Oxidation state of Fe + (Oxidation state of C) + 4(-2) + 2(-1) = 0

Oxidation state of Fe - 8 - 2 = 0

Oxidation state of Fe = +10

In summary, the oxidation state of iron (Fe) is +10 in both Fe(CO)5 and Fe(CO)4I2. It is important to note that oxidation states are assigned based on a set of rules and may not always directly correspond to the actual charge distribution in the molecule.

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To determine the molal freezing point depression constant (Kf) of water, an experiment can be conducted using deionized water and solid NaNO₃.

The experiment involves preparing a solution by dissolving a known mass of solid NaNO₃ in a measured volume of deionized water. The mass of NaNO₃ should be accurately determined, and the volume of water should be measured precisely.

The solution is then cooled in a controlled environment, such as a low-temperature bath or freezer, and the temperature is monitored using a sensitive thermometer. As the solution freezes, the temperature decreases until it reaches a constant value, indicating the freezing point.

By measuring the freezing point of the solution, the freezing point depression can be calculated by subtracting the freezing point of the solution from the freezing point of pure water. The molality (molal concentration) of the NaNO₃ in the solution can be determined using the mass of NaNO₃ and the mass of water.

Finally, the Kf value of water can be determined by dividing the freezing point depression by the molality (m) of the solution, using the equation ∆T = Kf × m.

By repeating the experiment with different masses of NaNO₃ and calculating the corresponding Kf values, an average Kf value can be obtained to characterize the freezing point depression of water in terms of molality.

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Answer:

we make water dirty

Explanation:

The concentration of nitrogen 2 mm from the surface after 25 hours is approximately 0.0198 wt%.

To find the concentration of nitrogen 2 mm from the surface after 25 hours, we can use Fick's second law of diffusion. The formula is given by:

C(x, t) = C0 * erfc((x / (2 * sqrt(D * t)))

Where:
C(x, t) is the concentration at a distance x from the surface at time t
C0 is the initial concentration at the surface
erfc is the complementary error function
D is the diffusion coefficient
x is the distance from the surface
t is the time

Given:
Initial concentration, C0 = 2 wt% = 0.02
Diffusion coefficient, D = 2.8 x 10^-11 m^2/s
Distance from the surface, x = 2 mm = 0.002 m
Time, t = 25 hours = 25 * 3600 seconds = 90000 seconds

Substituting these values into the formula:

C(0.002, 90000) = 0.02 * erfc((0.002 / (2 * sqrt(2.8 x 10^-11 * 90000))))

Evaluating this equation, we find that the concentration of nitrogen 2 mm from the surface after 25 hours is approximately 0.0198 wt%.

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Answer:

true

Explanation:

Answer:

do you have any vocabulary to help you with this or no

The number of protons in an isotope atom does not change but the number of neutrons does. The iron atom has about twenty-eight isotopes. Such as 45Fe, 46Fe, 47Fe, 48Fe, 49Fe, 50Fe, 51Fe, 52Fe, 53Fe, 54Fe, 55Fe, 56Fe, 57Fe, 58Fe, 59Fe, 60Fe, 61Fe, 62Fe, 63Fe, 64Fe, 65Fe, 66Fe, 67Fe, 68Fe, 69Fe, 70Fe, 71Fe and 72Fe.

Among the isotopes, 54Fe (Observationally Stable), 56Fe, 57Fe, and 58Fe are stable and formed naturally. The remaining isotopes of iron are highly unstable and their half-lives are very short.

Isotope Mass number (A) Atomic number (Z) Neutron number = A – Z

45Fe 45.01458 26 19

46Fe 46.00081 26 20

47Fe 46.99289 26 21

48Fe 47.98050 26 22

49Fe 48.97361  26 23

50Fe 49.96299 26 24

51Fe 50.956820 26 25

52Fe 51.948114 26 26

53Fe 52.9453079 26 27

54Fe 53.9396090 26 28

55Fe 54.9382934 26 29

56Fe 55.9349363 26 30

57Fe 56.9353928 26 31

58Fe 57.9332744 26 32

59Fe 58.9348755 26 33

60Fe 59.934072 26 34

61Fe 60.936745 26 35

62Fe 61.936767 26 36

63Fe 62.94037 26 37

64Fe 63.9412 26 38

65Fe 64.94538 26 39

66Fe 65.94678 26 40

67Fe 66.95095 26 41

68Fe 67.95370 26 42

69Fe 68.95878 26 43

70Fe 69.96146 26 44

71Fe 70.96672 26 45

71Fe 71.96962 26 46

Answer:

Protons: 26

Neutrons: 30

Electrons: 24

Explanation:

They attract each other to form ionic networks.

The appropriate method for removing a solvent depends on several factors. The following answers are correct; volume of solvent being evaporated, volatility of the solvent, the hazards associated with the solvent, and the thermal stability of the product. Option A, C, E, and F are correct.

If a large volume of solvent needs to be removed, then a rotary evaporator or distillation may be necessary. For smaller volumes, a simple evaporation may be sufficient.

Solvents with high volatility can be removed by simple evaporation or with the help of a vacuum. Solvents with low volatility may require techniques such as rotary evaporation or distillation.

If the solvent is hazardous or toxic, special precautions such as fume hoods or closed systems may be necessary.

If the product is sensitive to heat, then techniques such as vacuum or freeze-drying may be necessary to remove the solvent.

Hence, A. C. E. F. is the correct option.

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two negative charges because electrons have a negative charge

Answer:

3,1,4,2

Explanation: the time is the longest for the liquid that has the biggest viscosity

Rebecca made a mixture of raisins, nuts, and dried fruit for a snack then kind of mixture was rebecca’s snack is heterogenous mixture

A mixture is composed of one or more pure substances in varying composition and a pure substances or a homogenous mixture consist of a single phase and a heterogenous mixture consist of two or more phases and when oil and water are combined and they do not mix evenly and but instead form two separate  layer and each of the layer is called a phase and here is a mixture of raisins, nuts, and dried fruit that's why it is different fruits are seen so it is the heterogenous mixture

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A substance's ability to be observed or measured without altering its identity is referred to as its physical property.  How successfully a substance can undergo a specific chemical transition is determined by its chemical characteristic.

A substance's ability to be observed or measured without altering its identity is referred to as its physical property. Physical characteristics might include things like color, density, hardness, melting, and boiling points, among other things. How successfully a substance can undergo a specific chemical transition is determined by its chemical characteristic.

Based on their physical and chemical properties, materials can be grouped. Matter is anything that has mass and space. It is possible to mix any solid, liquid, and gas. When a substance changes from one state of matter to another without changing its chemical composition, a physical transition takes place.

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A substance's hue varies over time: Chemical transformation (Over time, the material is changing into a different chemical.

How can you tell whether a change you witness is chemical or physical?

In a physical change, the substance's shape or appearance changes, but the type of matter it contains stays the same. In contrast, when matter undergoes a chemical transformation, at least one new substance with novel features is created.

Not every change in colour results from a chemical shift. If one were to alter a substance's colour through a non-chemical interaction, such as painting an automobile, the alteration would be physical rather than chemical. This is due to the fact that the car's makeup has not changed.

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Answer:

5618J

Explanation:

Q=mcT

where Q=Energy required

m=mass of the sample

c=specific heat capacity of water

T=the temperature change

Q=32g×4.18×(54-12)

Q=5617.92J

Answer:

good times

Explanation:

always nedded

Here the nuclear decay of phosphorous to give S-32 is an example of beta-decay. Hence, the emitted particle is an electron. Thus, option b is correct.

The heavy unstable radioactive isotopes undergo nuclear decay by the emission of alpha or beta particle. Thus, there are mostly two types of decays, alpha decay and beta decay.

In alpha decay, the isotope emits a helium nuclei. Hence, mass number decreases by 4 units and atomic number decreases by 2 units. In beta decay, mass number does not change but atomic number increases by 1.

Here, P-32 undergo beta -decay by emitting an electron to form S -32. Hence, atomic number is increased by one. Therefore, the mission product is an electron option b.

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Answer: Enzymes

Explanation: entzymes are natural catalysts, e.g. Amylase is an enzyme

So according to the given scenario in the Question, the simplest formula of the compound is\(C_1H_1O_{15}\).

First, we calculate the number of moles of water produced:

\(4.419 g H_2O * (1 mol H_2O/18.015 g) = 0.2452 mol H_2O\)

Number of moles of carbon dioxide produced:

\(10.65 g CO_2 * (1 mol CO_2/44.01 g) = 0.2418 mol CO_2\)

Using the law of conservation of mass:

Moles of C = moles of \(CO_2\) = 0.2418 mol

Moles of H = (moles of \(H_2O * 2\)) = 0.4904 mol

Now :

Moles of O = (mass of sample/molar mass of sample) - (moles of C + moles of H)

Molar mass of sample = 0.8050 g/mL x 5.450 mL x 22.4 L/mol = 98.29 g/mol

Moles of O = \((98.29 g/mol / 1 mol) - (0.2418 mol + 0.4904 mol) = 7.56 mol\)

Finally:

\(C: 0.2418 mol / 0.2418 mol = 1 \\H: 0.4904 mol / 0.2418 mol = 2.03\) ≈ 2

\(O: 7.56 mol / 0.2418 mol = 31.3\) ≈ 31

So the empirical formula of the unknown compound is\(CH_2O_{31}.\)

After simplifying it, the simplest formula of the compound is \(C_1H_1O_{15}\).

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