following sentences.
1.
energy is the work done by a
force acting through a distance and involves
motion.


2.
describes the amount of energy
in a system.

Considering the Dalton's partial pressure, the partial pressure of nitrogen in the tank is 41 atm.

The pressure exerted by a particular gas in a mixture is known as its partial pressure.

So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

\(P_{T} =P_{1} +P_{2} +P_{3} + ... +P_{n}\)

where n is the amount of gases present in the mixture.

This relationship is due to the assumption that there are no attractive forces between the gases.

In summary, the total pressure in a mixture of gases is equal to the sum of partial pressures of each gas.

In this case, the total pressure of the gas mixture is calculated as:

\(P_{T} =P_{oxygen} +P_{helium} +P_{nitrogen}\)

You know that:

Replacing in the expression for the total pressure:

\(180 atm=81 atm+58 atm+P_{nitrogen}\)

Solving:

180 atm -81 atm -58 atm= \(P_{nitrogen}\)

41 atm= \(P_{nitrogen}\)

Finally, the partial pressure of nitrogen in the tank is 41 atm.

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Answer:

Hydochloric acid

HCl

Explanation:

Hydrochloric acid is an acid and ionizes to form hydrogen and chloride ions.

The name of the compound that gives hydrogen ion and chloride ions in the solution state is Hydrochloric acid.

Hydrochloric acid is made up of one atom of hydrogen and 1 atom of chlorine. We can also say, it is made up of 1 mole of hydrogen and 1 mole of chlorine.

 The formula of this compound is HCl;

 In solution:

               HCl\(_{aq}\)    →   H⁺    +    Cl⁻  

Theoretical yield of copper is 7.22 g when 4.25g of iron in the chemical reaction.

2Fe(s) + 3Cu2(aq.) ---->  2Fe3(aq.)  + 3Cu (s)

Molar mass of Iron (Fe) is 56g/mole.

Molar mass of copper (cu) is 63.5g/mole.

2 mole ( 2 * 56g/mole) Iron produces = 3 mole ( 3 * 63.5g/mole ) copper

Theoretical yield is the maximum amount of product that could be formed from the given amounts of reactants. The actual yield is the amount of product that is actually formed when the reaction is carried out in the laboratory. The theoretical yield is the amount of product that would be formed from a reaction if it was 100% efficient.

There are 4. 25 g of Iron .so,

4.25 g Iron produces = (3 * 63.5g / 2 * 56 g ) * 4.25 g copper

                                     = 7.22 g copper

Theoretical yield of copper is 7.22g.

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In conclusion, the order of the conjugate bases in decreasing order of basicity is NO3-, CH3COO-, C6H5O-, OH-, and HC2H3O2-.

This arrangement helps us understand the relative strengths of acids and their conjugate bases let's first understand what conjugate bases are. Conjugate bases are the species that result from the removal of a proton (H+) from an acid. In other words, it is the acid minus a proton. So, for example, the conjugate base of HNO3 is NO3-, and the conjugate base of CH3COOH is CH3COO- now that we know what conjugate bases are, we can arrange them in order of decreasing basicity using the same order as the original acids:
NO3- > CH3COO- > C6H5O- > OH- > HC2H3O2-
This means that NO3- is the strongest conjugate base (i.e. the weakest acid) and HC2H3O2- is the weakest conjugate base (i.e. the strongest acid) in the given group of acids. The basicity of a conjugate base is directly related to the acidity of its parent acid. The stronger the acid, the weaker its conjugate base, and vice versa.

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Bohr: Electrons move in circular paths that have different energies.

Thomson: Atoms contain electrons.

Dalton: Matter is made up of indivisible atoms.

Schrodinger and others: Electrons exist in a cloud of probability.

Rutherford: The mass of an atom is concentrated in its center.

Answer:

The screenshot shows all the answers

Explanation:

Answer:

your answer gonna be 20 miles

Blue = orange/yellow light (wavelengths around 450-500 nm) is absorbed by the solution that appears blue.

Red = green light (wavelengths around 550-600 nm) is absorbed by the solution that appears red.

Orange = blue light (wavelengths around 450-500 nm) is absorbed by the solution that appears orange.

Green = red light (wavelengths around 650-700 nm) is absorbed by the solution that appears green.

Give a short note on absorption.

Color absorption takes place because substances selectively absorb certain wavelengths of visible light, while transmitting or reflecting others. The color that we perceive is the result of the wavelengths of light that are not absorbed, but rather transmitted or reflected, and detected by our eyes. This phenomenon is commonly used in colorimetric analysis and can provide important information about the electronic structure and composition of a substance.

Hence, the answer is,

Blue = orange/yellow light

Red = green light

Orange = blue light

Green = red light

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12.28 L volume at 6.98atm in sample gas occupies 10. 28 l at 8. 34atm. Hence, option A is correct.

Ideal gas is a hypothetical gas whose molecules occupy negligible space and have no interactions, and which consequently obeys the gas laws exactly.

In the limit of low pressures and high temperatures, where the molecules of the gas move almost independently of one another, all gases obey an equation of state known as the ideal gas law:

PV = nRT,

When Temperature is constant so, it follow Boyle's law:

P1 V1 = P2 V2

P1 = 8.34atm, V1 = 10.28 L, P2 = 6.98atm

V2 = P1 V1 / P2

V2 = 8.34atm x 10.28 / 6.98atm

V2 = 12.28 L

12.28 L volume at 6.98atm in sample gas occupies 10. 28 l at 8. 34atm. Hence, option A is correct.

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Answer:

652.17cm³

Explanation:

Mass=1.5kg=1500g

Density =2.3g/cm³

Volume =Mass/Density

Volume =1500/2.3

Volume =652.17cm³

Answer:

This relationship between temperature and pressure is observed for any sample of gas confined to a constant volume. I find that temperature and pressure are linearly related. If the temperature on the kelvin scale increases by a certain factor, the gas pressure increases by the same factor. On the can is the warning “Store only at temperatures below 120 °F (48.8 °C). Do not incinerate.” The can contains an amount of isobutane gas at a constant volume, so if the temperature increased by heating, the pressure will increase proportionately. High temperature could lead to high pressure, causing the can to burst. Just like,  The gas in the can is initially at 24°C,  and the can has a volume of 350 mL.  If we fill a balloon with air and seal it,  If we put the balloon in a refrigerator, the gas inside gets cold and the balloon shrinks. If we make the balloon very cold, it will shrink a great deal, and it expands again when it warms up. Temperature is sometimes measured with a gas thermometer by observing the change in the volume of the gas as the temperature changes at constant pressure. A volume change caused by a temperature change at constant pressure means we should use Charles’s law. Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure. In fact, if the volume increases by a certain factor, the pressure decreases by the same factor, and vice versa.  The earth’s atmosphere exerts a pressure, as does any other gas. Although we do not normally notice atmospheric pressure, we are sensitive to pressure change, for example, when your ears “pop” during take off and landing while flying, or when you dive underwater.  Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure. In fact, normal air pressure is strong enough to crush a metal container when not balanced by equal pressure from inside the container.  Atmospheric pressure is caused by the weight of the column of air molecules in the atmosphere above an object, such as the tanker car. At sea level, this pressure is roughly the same as that exerted by a full-grown African elephant standing on a doormat, or a typical bowling ball resting on your thumbnail. These may seem like huge amounts, and they are, but life on earth has evolved under such atmospheric pressure. If you actually perch a bowling ball on your thumbnail, the pressure experienced is twice the usual pressure, and the feeling is unpleasant.

Explanation:

A contained gas's pressure rises as its volume decreases, while its pressure falls as its volume rises. In fact, if the volume increases by a certain factor, so does the pressure, and vice versa. The earth's atmosphere, like any other gas, exerts pressure.

Boyle's Law describes the relationship between pressure and volume. The volume of a gas decreases as the pressure on it increases because the gas particles are forced closer together. As the pressure on a gas decreases, the volume of the gas increases because the gas particles can now move farther apart.

As a result, volume is inversely proportional to pressure. A straight line is obtained by plotting pressure (p) against the reciprocal of volume (1/V), the gradient of which is the constant in Boyle's Law. The number of gas particles per unit volume increases as volume decreases.

The pressure-volume relationship of a confined gas is inversely proportional. This relationship is demonstrated by the data collected and the graphs plotted.

Thus, A contained gas's pressure rises as its volume decreases, while its pressure falls as its volume rises.

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In the decay reaction 60 60, 29 27 Co→28 Ni+ ? the emitted particle is an electron. This process is called Beta minus decay. In this process, a neutron in the nucleus transforms into a proton and an electron. The proton remains in the nucleus while the electron, with high energy, is emitted from the nucleus.

This causes the atomic number of the nucleus to increase by one, but the mass number remains the same. This process is governed by the weak nuclear force.Let's look at the balanced nuclear equation for this process and see how the emission of the electron is represented.

60Co → 60Ni + β-1 + γ

The symbol β-1 represents the emitted electron, and the symbol γ represents the emission of a gamma ray. The gamma ray is emitted as the nucleus transitions from a higher energy state to a lower energy state after the beta decay. The gamma ray has high energy, similar to X-rays, but is highly penetrating and dangerous to living organisms. Hence it is necessary to handle radioactive sources with care. The decay of Cobalt-60 is a common source of gamma rays used in the medical industry for radiotherapy to treat cancer. Cobalt-60 decays with a half-life of 5.26 years, which makes it a useful and long-lasting source for such applications.

In conclusion, the emitted particle in the decay reaction 60Co → 60Ni + β-1 + γ is an electron, emitted due to Beta minus decay. The process is governed by the weak nuclear force.

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The nucleus decays into the daughter nucleus, which has an atomic number lower by 2 and a mass number lower by 4, as well as an alpha particle. In the reaction 60 60, 29 27 Co→28 Ni+ ? the emitted particle is an alpha particle. In radioactive decay, the atom's nucleus undergoes a transformation, emitting alpha, beta, or gamma radiation to achieve stability.

An alpha particle is a particle consisting of two protons and two neutrons, and it is produced as a result of alpha decay, which is a type of radioactive decay. A nucleus may be unstable if it contains too many protons or neutrons, or if the energy required to keep the nucleus together (binding energy) is insufficient.

Unstable nuclei seek to reach a more stable state by undergoing radioactive decay. The daughter nucleus, which has an atomic number lower by 2 and a mass number lower by 4, is formed as a result of alpha decay. Therefore, in the reaction 60 60, 29 27 Co→28 Ni+ ? the emitted particle is an alpha particle.

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Answer:

C

Explanation:

C) an atom with an atomic number of 18

Answer:

A

Explanation:

One of the most important aspects to consider when looking at the fire potential of flammable liquid is its flash point.

A flash point is the lowest temperature at which a flammable liquid produces a sufficient vapor concentration that can ignite in the presence of an ignition source. It is an essential factor in evaluating the potential for fire hazards and for designing safety systems.

The lower the flash point of a liquid, the more volatile it is and, therefore, the higher the likelihood of ignition and fire. On the other hand, if a liquid has a higher flash point, it means that it will require higher temperatures to ignite. Hence, it is less likely to ignite and poses a lower fire risk.

Therefore, when handling, storing, or transporting flammable liquids, it is essential to be aware of their flash points. It helps in selecting the appropriate safety measures to minimize the risk of fire and protect workers, property, and the environment.

 Overall, flashpoints provide a way to classify flammable liquids based on their potential fire hazards. It is an essential tool to manage fire hazards and ensure safety.

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The concentration of chloride ions in the solution is 0.012 mM.

To determine the concentration of chloride ions (Cl-) in the solution, we need to first calculate the number of moles of calcium chloride (CaCl2) that were dissolved in the solution. We can use the formula weight of calcium chloride, which is 110.98 g/mol:

=> 23.7 g CaCl2 / 110.98 g/mol

=> 0.214 moles CaCl2

Next, we need to determine the number of moles of chloride ions produced when the calcium chloride dissolves. Since calcium chloride is an ionic compound, it dissociates into its constituent ions when dissolved in water. For every mole of calcium chloride that dissolves, one mole of calcium ions (Ca2+) and two moles of chloride ions (Cl-) are produced.

So, the number of moles of chloride ions produced is twice the number of moles of calcium chloride that were dissolved:

0.214 moles CaCl2 * 2 moles Cl- / 1 mole CaCl2

=> 0.428 moles Cl-

Finally, to determine the concentration of chloride ions in the solution, we need to divide the number of moles of chloride ions by the volume of the solution. The volume of the solution can be calculated from its mass and density:

=> 375 g solution / 1.05 g/mL

=> 358.33 mL

Now we can calculate the concentration of chloride ions in moles per milliliter (mM):

=> 0.428 moles Cl- / 358.33 mL

=> 0.012 mM Cl-

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In an HCP (hexagonal close-packed) metal, the family of planes that act as dislocation slip planes are the basal planes. In three Miller index notation, these planes are represented as {0001}.

The {110} planes you mentioned are not the primary slip planes in HCP metals, but rather in BCC (body-centred cubic) metals. Remember, for HCP metals, the primary slip planes are the basal {0001} planes.

In hexagonal close-packed (hcp) metals, the planes that act as dislocation slip planes are the basal planes, which are parallel to the base of the hexagonal unit cell. The basal planes are represented by the Miller indices (0001) in three-index notation, where the first two indices (0,0) represent the unit cell translation perpendicular to the basal plane, and the last index (1) represents the spacing between the basal planes. Therefore, dislocations in hcp metals typically occur on the (0001) basal planes.

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Answer:

Answer:

B.) conclusion

Answer: Aluminum is ideal for aircraft manufacture because it's lightweight and strong.

Explanation:

Answer:

im pretty sure its b

Explanation:

When any substance converts to liquid then heat is required to break the intermolecular forces of attraction between the particles. In this process heat increase but temperature remains the same. The line along B represents the melting of unknown substance. Therefore the 72°C is melting point of the substance.

Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure. Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.

During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing.

The line along B represents the melting of unknown substance. Therefore the 72°C is melting point of the substance.

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Answer:

D

Explanation:

metals are conductors because energy such as electricity and heat can pass through them

metals are ductile because they can be drawn out into thin wires

metals are malleable because due to the way the atoms are structured they can be bent and shaped without breaking

therefore the answer is all off the above

hope this helps :)

The two types of nucleophilic substitution reactions are SN1 and SN2. SN2 has two molecules, whereas SN1 only has one.

A nucleophilic molecule replaces a different atom or group of atoms on a molecule, known as the leaving group, in a nucleophilic substitution reaction. The substrate molecule is attacked by the nucleophilic molecule's abundant electrons.

A process in which one functional group or atom is swapped out for another negatively charged functional group or atom is known as a nucleophilic substitution reaction.

The SN1 reaction is monomolecular, whereas the SN2 reaction is bimolecular.

Any substitution reaction in which an atom or functional group is changed for one that has a single pair of electrons, a negatively charged ion, or both. The negatively charged ion or the atoms/molecules with lone pairs of electrons will be pulled to the positively charged area of an atom or complex in an effort to replace the functional group or atom already attached to the positive location.

Therefore, The two types of nucleophilic substitution reactions are SN1 and SN2. SN2 has two molecules, whereas SN1 only has one.

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Oxidations states can be used to tell if a Lewis diagram is relatively stable. This statement is not true, it is false. correct option is ii

Explanation:

Oxidation states can be defined as the number of electrons that an atom gains or loses in order to obtain a stable outer electron configuration.

Lewis diagrams or Lewis structures are used to illustrate the electrons present in atoms and molecules. They depict the arrangement of electrons around atoms and show the chemical bonds between atoms in a molecule.

Oxidation states can be used to identify the number of electrons that an atom gains or loses, however, they cannot be used to determine the relative stability of a Lewis diagram.

Stability of a Lewis diagram is determined by the octet rule which states that atoms tend to gain or lose electrons to obtain a stable electron configuration with a full valence shell.

Therefore, the correct option is i. Oxidations states cannot be used to tell if a Lewis diagram is relatively stable, which is false.

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Answer:  5 plates

Explanation:

Because you have 5 sandwiches total

5 plates are the theoretical yield. Hence, option C is correct.

The theoretical yield is the maximum possible mass of a product that can be made in a chemical reaction.

The actual yield is the result obtained from the experiment while the theoretical yield is the result obtained from our calculations.

The actual yield of a chemical reaction rarely equals the theoretical yield because some of the amounts are lost during the process.

5 plates are the theoretical yield.

Hence, option C is correct.

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The conclusions or discussions presented in study 2 regarding the relationship between Cl- wet deposition and seasonal variations.

To determine if the statement is supported by the results of study 2, we need to follow a step-by-step process:

Obtain the results of study 2: Obtain the research paper or report detailing the results of study 2.

Identify the variables and data: Look for data related to Cl- wet deposition and its values during different seasons, specifically winter and early spring.

Analyze the data: Examine the data to see if it provides information on Cl- wet deposition values during different seasons.

Compare the values: Compare the Cl- wet deposition values during the winter and early spring to values from other seasons (e.g., summer, autumn) to determine if there is a notable difference.

Consider the findings: Review the conclusions or discussions presented in study 2 regarding the relationship between Cl- wet deposition and seasonal variations.

Check if the study supports the statement that Cl- wet deposition values are greater during the winter and early spring.

Evaluate the evidence: Assess the strength of the evidence provided by study 2. Consider factors such as sample size, statistical significance, and any limitations or potential biases.

Formulate a conclusion: Based on the analysis of the data and findings in study 2, determine if the statement is supported or not.

Without access to the specific results and findings of study 2, it is not possible to provide a definitive answer.

It is essential to consult the actual study and evaluate the evidence within its context to determine if the statement is supported.

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The complete, balanced chemical reaction for the reaction between gold (Au) and selenic acid (H2SeO4) is: 4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O. The coefficients for the reactants and products are as follows: 4 for Au, 3 for H2SeO4, 2 for Au2(SeO4)3, 1 for H2SO3, and 1 for H2O. The type of chemical reaction is a single displacement reaction.

The balanced chemical equation for the reaction between gold (Au) and selenic acid (H2SeO4) is:

4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O

In this equation, the coefficient in front of Au is 4, indicating that 4 moles of gold are involved in the reaction. The coefficient in front of H2SeO4 is 3, indicating that 3 moles of selenic acid are present.

On the product side, the coefficient in front of Au2(SeO4)3 is 2, indicating the formation of 2 moles of gold selenate. The coefficient in front of H2SO3 is 1, representing the formation of 1 mole of sulfurous acid. The coefficient in front of H2O is also 1, indicating the production of 1 mole of water.

Based on the reactants and products involved, the type of chemical reaction is a single displacement reaction, as gold displaces hydrogen in selenic acid to form gold selenate.

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