In an experiment, 5.00 L of N₂ is saturated with water vapor at 22°C and then compressed to half its volume at constant T.
(b) What mass of water vapor condenses to liquid?

Answer:

C

\( \triangle \: H {}^{ \theta} _{s} = lattice \: energy + hydration \: energy \\ = + 2526 + ( - 2003 + (2 \times - 340)) \\ + 2526 - 2683 \\ = - 157 \: kjmol {}^{ - 1} \)

Answer:B

Explanation:

the particles in a gas are more far apart and have more kinetic energy than liquid because they are more close together and have less kinetic energy than   gas.  

The kinetic molecular theory explains the compressibility of gases as gas particles are in constant, random motion and have negligible volume. When pressure is applied, the particles can be compressed due to their free movement.

Two independent ways to increase gas pressure without adding more gas are by decreasing volume or increasing temperature, while keeping the number of particles constant. Decreasing volume increases collisions and pressure, while increasing temperature raises particle speed and pressure.

The variables held constant in Boyle's law are temperature and the number of gas particles. Boyle's law states that pressure and volume are inversely proportional, so decreasing volume leads to increased pressure while temperature and particle number remain unchanged.

The partial pressure of oxygen gas in normal air is around 20.9%. This means oxygen contributes approximately 20.9% to the total pressure of the air mixture.

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Answer:

it is d

Explanation:

because of the race he went from 400**'x greater than 58,

Answer:

It is not an oxidation-reduction reaction. The formation of carbon dioxide and water are redox reactions which involve the oxidation of carbon and hydrogen respectively with oxygen being reduced in both the case.

Explanation:

This is not a redox reaction.

A redox reaction is the one that involves reduction and oxidation simultaneously. In a redox reaction, one of the substance gets oxidised and behaves as a reducing agent and the other gets reduced that behaves as an oxidizing agent.

The oxidation or reduction of the substance is decided by the change in oxidation number of the atom which is the charge that an atom appears to have on forming ionic bonds with other heteroatoms.

In this reaction, no change in oxidation state of the atoms takes place and thus this reaction is not a redox reaction.

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a) Effective resistivity of carbon electrode: Carbon electrode is used in electrical arcing applications.

The resistivity of graphite (in polycrystalline form) at room temperature is approximately 9.1 μΩm and it is known that the electrode used in the electrical arcing application is 47% porous.

The effective resistivity of the carbon electrode can be calculated using the formula for the effective resistivity of the porous material

ρ=ρs(1+2.5D)

Where, ρ = effective resistivityρs = resistivity of solid D

= porosity of the material

Using the given values of ρs and D, we have

ρ = 9.1 x (1 + 2.5 x 0.47)ρ = 18.09 μΩm

Comparison of estimates with measured value of resistivity:

The measured value of resistivity = 18 μΩm

The estimated value of resistivity using the effective resistivity formula

= 18.09 μΩm

The difference between these two values is very small, which means that the effective resistivity formula is very accurate in predicting the effective resistivity of a porous material.

b) Effective conductivity of graphite paste with silver particles:

The resistivity of silver at 273 K is given as 14.6 nΩm. The volume fraction of silver particles dispersed in the graphite paste is 30%.

The effective conductivity of the paste can be calculated using the formula for the effective conductivity of the mixture

σm = σ1f1 + σ2f2

Where,

σm = effective conductivity σ1

= conductivity of component 1f1

= volume fraction of component 1σ2

= conductivity of component 2f2

= volume fraction of component 2

Using the given values, we have

σm = (1 / 14.6) x 0.3 + (1 / 9.1) x 0.7σm

= 0.023 + 0.076σm

= 0.099 mS/m

= 99 μS/cm

Therefore, the effective conductivity of the paste is 99 μS/cm at 300 K.

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The key differences between the Articles of Confederation and the U.S Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

The document created the better system of government for the new nation is the US constitution.

The Article of confederation , the state have stronger power than the central power and in the US constitution , the power of central government is stronger than the states. The important development was the establishment of three departments. There are three departments of government that is legislative , executive and judicial.

Thus, The key differences between the Articles of Confederation and the U.S. Constitution is the article of confederation is sovereignty in states and the constitution  is expand the governments authority.

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The availablity of oxygen and moisture or water.

Answer:

Explanation:

I think it's D but I could be wrong

Answer:

D

Explanation:

Answer:

The water displacement method, can be used to accurately find out the volume of an object of any shape. Basically, it relies on the fact that for all practical purposes, water is incompressible. So when an object enters water held in a container, the water gets displaced to make room for it.

Explanation:

YOU THE BRAINLIEST

Answer:Helium

Explanation:

Helium can hold two electrons on the outer shell. as for the inner part it mostly looks like helium.

Answer:

Put their markers together, now they have each color

Explanation:

Answer:

They should share the colors that they are missing

Explanation:

That way, they would both have each color

The flaw in Regina’s plan is that the time frame is unrealistic (option B).

Goal setting involves the development of an action plan designed in order to motivate and guide a person or group toward a goal, which is a result that one is attempting to achieve.

Effective goal setting lets you measure progress, overcome procrastination and visualize your dreams. However, setting goals is said to be effective when it is done in an adequate time frame.

According to this question, Regina identifies her goal and hastily writes it down as follows: I will make an A on my English literature term paper that is due next week.

This goal, although is great, is unlikely to be met because of the time frame. One cannot get an excellent result in something that lacks adequate preparation, which includes adequate time.

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Answer:

A. the electric motor

Explanation:

A cell is a biological molecule which is the basic and functional unit of life. Cells undergo series of processes to function appropriately. ATP is an acronym for adenosine triphosphate, which is the source of energy for various cell processes.

In the given mechanical system, the electric motor provides the energy required energy to drive the system. Therefore, the electric motor has the same major function of providing energy for the system as the ATP in a cell.

Answer:

it is dotted

Explanation:

Answer:

a: 1.181grams of iodine are present in the sample of soluble iodide.

b: 76.44 percent iodine is the mass percentage of iodine when excess silver nitrate was added to precipitate all of the iodide ions

Explanation:

We know that when silver reacts with halides it forms precipitate, silver when reacts with iodine it forms a yellow coloured precipitate of silver iodide which is an inorganic compound soluble in water. One odd characteristic of silver iodide is that it is photosensitive and may form metallic/dark silver if exposed to light. One of the most renowned albeit controversial use of silver iodide is that it is used to generate rain through clouds

Ag+ (aqueous)+ I−(aqueous) →AgI(s) yellow precipitate

2.185g x  (1 mole of AgI / 234.77 AgI)  x (1 mole Iodine/1 mole AgI)  x (126g of Iodine/1 mole of I)

= 1.181g

b)Now, mass percentage can be obtained by using the following formula

mass percentage = mass of solute/mass of solution x 100

iodine mass percent = (mass of iodine/mass of soluble iodide) x 100

= (1.181/1.545) x 100 = 76.44 %

mass percentage is the mass of the element/solute divided by the mass of compound or solution ,then the result is multiplied to get the answer. It can be defined as the weight of solute in a particular weight of solution.

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The pressure of the gas when the volume is 1.76 L and the temperature is 308 K is approximately 1.77 atm using the combined gas laws.

To calculate the pressure of an ideal gas using the combined gas law, we can use the formula:

P1 * V1 / T1 = P2 * V2 / T2

Where:

P1 = Initial pressure of the gas (1.02 atm)

V1 = Initial volume of the gas (2.32 L)

T1 = Initial temperature of the gas (285 K)

P2 = Final pressure of the gas (to be determined)

V2 = Final volume of the gas (1.76 L)

T2 = Final temperature of the gas (308 K)

Plugging in the values:

(1.02 atm) * (2.32 L) / (285 K) = P2 * (1.76 L) / (308 K)

Now, solve for P2:

P2 = (1.02 atm) * (2.32 L) * (308 K) / (1.76 L) / (285 K)

= 1.77 atm

Therefore, the pressure of the gas when the volume is 1.76 L and the temperature is 308 K is approximately 1.77 atm.

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Answer:

dic

Explanation:

Answer:

NO3 will produce 2 acids

Ksp for BaSO4 is 9.70 x 10^-11. Represents the equilibrium constant for the dissolution of BaSO4 in water at 25°C, indicating the extent to which solid BaSO4 dissociates into Ba2+ and SO42- ions in saturated solution.

To calculate Ksp for BaSO4, we need to use the solubility data and the stoichiometry of the balanced equation. The balanced equation for the dissolution of BaSO4 in water is: BaSO4(s) ⇌ Ba2+(aq) + SO42-(aq). From the solubility data given, we know that the solubility of BaSO4 is 0.0023 g/L.

To calculate Ksp, we need to determine the concentrations of Ba2+ and SO42- ions in the saturated solution. Since the stoichiometry of the balanced equation is 1:1 between BaSO4 and Ba2+ or SO42-, the concentration of Ba2+ and SO42- in the saturated solution will also be equal. Let's assume the concentration of Ba2+ and SO42- in the saturated solution is x mol/L.

Then, the solubility product expression for BaSO4 can be written as: Ksp = [Ba2+][SO42-] = x * x = x^2. Since the solubility of BaSO4 is 0.0023 g/L, we need to convert it to mol/L. The molar mass of BaSO4 is 233.39 g/mol, so the solubility in mol/L is:

0.0023 g/L / 233.39 g/mol = 9.85 x 10^-6 mol/L

Now, we can substitute this value into the Ksp expression:

Ksp = (9.85 x 10^-6 mol/L)^2 = 9.70 x 10^-11

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Less evaporation means that less of the sun's energy is used to convert water into water vapor, and more of it is used to heat up the surface. In urban areas, there is typically less vegetation and more impervious surfaces (such as concrete and asphalt), which reduces the amount of water that can evaporate.

This means that more of the sun's energy is absorbed by the surface, leading to higher temperatures. Additionally, buildings and other structures in urban areas can trap heat and prevent it from dissipating, further contributing to the urban heat island effect.

In rural areas, vegetation and soil moisture play an important role in regulating temperature through a process called evapotranspiration. Evapotranspiration is the combined process of water evaporation from the soil and plant transpiration. It helps to cool the air by removing heat from the surface through the transfer of water from the surface to the atmosphere.

In contrast, urban areas have a significant amount of impervious surfaces like concrete, asphalt, and buildings, which reduce the amount of vegetation and soil moisture. As a result, urban areas have less evapotranspiration, which means less cooling effect from the evaporation of water. This leads to a higher surface temperature in urban areas.

Furthermore, urban areas have a higher proportion of dark-colored surfaces, such as asphalt and concrete, which absorb more solar radiation than lighter-colored surfaces like vegetation and soil. This is known as the "urban heat island effect," which further contributes to higher temperatures in urban areas.

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Answer:

310.15 Degrees Kelvin

Explanation:

37 Degrees Celsius = 310.15 Degrees Kelvin = 98.6 Degrees Fahrenheit

Conversion Factor from Celsius to kelvin

or 37 + 273 = 310 Degrees Kelvin

The value of ΔGrxn for the given reaction is -156.74 kJ·mol-1 at 25 °C.

To calculate ΔGrxn for the given reaction, we can use the following equation:

ΔGrxn = ΣnΔfG(products) - ΣmΔfG(reactants)

where ΔfG is the standard molar Gibbs free energy of formation, n and m are the stoichiometric coefficients of the products and reactants respectively.

Let's start by writing the balanced chemical equation for the reaction:

\(SO_2(g) + 2 H_2(g)\) → \(S(s) + 2 H_2O(g)\)

Now we can use the given values of ΔfG to calculate ΔGrxn:

ΔGrxn = [ΔfG(S) + 2ΔfG(\(H_2O\))] - [ΔfG(\(SO_2\)) + 2ΔfG(\(H_2\))]

ΔGrxn = [0 + 2(-228.57 kJ·mol-1)] - [-300.4 kJ·mol-1 + 2(0)]

ΔGrxn = -457.14 kJ·mol-1 + 300.4 kJ·mol-1

ΔGrxn = -156.74 kJ·mol-1

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Answer:

The balance equation of Ca(OH)2 + HCl ---> CaCl2 + H2O​

is

Ca(OH)2(s) + 2HCl(aq) ---> CaCl2(aq) +2H2O​ (l) (balanced equation)

Peptide bonds are an example of covalent bonding.

A chemical bond is a link between two atoms in a molecule. It is a chemical bond that binds atoms together. Covalent bonds are one of three main types of chemical bonds in the field of chemistry, the other two being ionic bonds and metallic bonds.

The electrons are shared between atoms in covalent bonds, resulting in stable molecules being formed. When two atoms share a pair of electrons, a covalent bond is formed. Both atoms are bound together by the bond's energy and, as a result, become more stable.  Examples of covalent bonds include bonds that are found in diatomic elements and compounds containing carbon (such as hydrocarbons).

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Answer:

Fossil fuels are non-renewable which means that they wont last forever and they contribute largely to unnatural climate change.

Explanation:

The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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The reaction, as written, is an exothermic reaction.

In an exothermic reaction, heat is released or given off to the surroundings. This can be observed as an increase in temperature, the production of light, or the release of heat energy. In the given reaction, 2NO2(g) → N2O4(g), the forward reaction results in the formation of N2O4, and it is exothermic.

The formation of N2O4 from 2NO2 releases energy in the form of heat. This means that the products of the reaction (N2O4) have lower energy than the reactants (2NO2). The difference in energy is released as heat to the surroundings.

It is important to note that the statement assumes that the reaction is carried out at constant pressure. In such a scenario, any heat released or absorbed would result in a change in temperature or the enthalpy of the system, while the pressure remains constant.

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Answer:

(A) chlorine is an oxidizing agent in this reaction so it oxidize iodine and it itself is reduced

Explanation:

Cl2 oxi no. = 0 became Cl- oxi no. = -1

so it is reduced

I- oxi no. = -1 became I2 oxi no. = 0

so it oxidized