How much energy is needed to change 475. 0 grams of liquid water at 40. 0°C to steam at 100. 0°C?

Pendulum shows the path it takes as it swings back and forth and it is because of kinetic energy is converted into potential energy only once

Pendulum is the point mass suspended by the weightless and inextensible string fixed rigidly to support pendulum is also used in scientific instrument and it form because of gravity and in that pendulum potential energy is transformed to the kinetic energy and come back again and weight of pendulum is released and then it get active and gravity pull it back and that's why kinetic energy is converted into potential energy only once

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The molar mass of the solute x is 85.32 g/mol.

The mass of the unknown, non-volatile, non-electrolyte solute = 12.0 g

Mass of the solvent = 100 g

The vapor pressure of the solvent before adding the solute = 100 torr

The vapor pressure of the solvent after adding the solute = 91.4 torr

Temperature = 299 K

Raoult's law can be written as:

P₂ = X₂ * P₁

Where:

P₁ = the vapor pressure of the pure solvent

P₂ = the vapor pressure of the solution

X₂ = the mole fraction of the solute

Solving for

X₂;X₂ = P₂/P₁ = 91.4/100

    X₂ = 0.914

Calculate the moles of benzene;

n = 100g / 78.11 g/mol = 1.28 moles

X₂ = moles of solute / (moles of solute + moles of benzene)

Substituting the value of X₂ and moles of benzene;

n = 0.1406 moles

Now we need to calculate the moles of the solute;

Mass of solute = 12.0 g

Now, we will use the following formula to calculate the molar mass of the solute;

Molar mass = Mass of solute / Moles of solute

Molar mass = 12.0 g / 0.1406 moles

Molar mass of the solute is 85.32 g/mol.

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Answer:

The gas volume remains constant

Explanation:

The volume stayed constant however the balloon may seem to have shriveled or deflated upon walking outside due to the helium condensing in  the cooler climate.

Answer:

B. convection because warm air rises and cool air sinks.

Explanation:

The processes that enables birds to fly to higher altitudes without flapping their winds while riding air thermals is called convection.

Convection is one of the forms of heat transfer usually found in gases and liquids.

Answer:

b)

Explanation:

hydrogen bond is a form of dipole-dipole interaction but with more unique properties

In the case of a proton deposit customer (an acid), the answer is electron withdrawal customer.option B.

An acid is a chemical compound that donates protons or accepts an electron pair in reactions with another chemical substance. The concept of acid and base behavior was first recognized by Svante Arrhenius in 1884 when he proposed the idea of electrolytes. An acid is defined as a substance that donates protons (H+) and a base as a substance that accepts protons (H+).This is because the proton deposit customer (an acid) is defined as a substance that donates protons (H+) and accepts electrons, while an electron withdrawal customer is defined as a substance that accepts electrons but doesn't necessarily donate protons. Acids and electron withdrawal customers have an inverse relationship, in that when an acid donates a proton, it can also accept electrons. Conversely, when an electron withdrawal customer accepts an electron, it can donate a proton. The most important difference between the two is that acids donate protons, while electron withdrawal customers accept electrons.A proton withdrawal customer, on the other hand, is a substance that accepts protons and donates electrons. This is the opposite of a proton deposit customer (an acid), as the acid donates protons and accepts electrons. An electron deposit customer, on the other hand, is a substance that donates electrons and accepts protons, which is not similar to an acid.option B.

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Answer:

[He]2s2  2p1.

that is the answer have an amazing day. Remember your an amazing person for who you are.

\((40.0)(7.426)=\boxed{297.0 \text{ g (to 4 sf)}}\)

If the density of carbon tetrachloride is 0. 793 g/ml, and a sampl.e has a volume of 9. 29 ml the mass is 7.367 g

For CCl4

Density of carbon tetrachloride = 0.793 g/ml

Volume of sample = 9.29ml

mass = density * volume = 0.793 × 9.29 = 7.367 g

The chemical name for carbon tetrachloride, sometimes referred to as tetrachloromethane and recognized by the IUPAC, carbon tet in the cleaning business, Halon-104 in firefighting, and Refrigerant-10 in HVACR, is CCl4. It is an organic compound. It has an indistinct color and a just perceptible "sweet" odor. At lower temperatures, it is almost incombustible. Prior to being phased out because to environmental and safety concerns, it was frequently used in fire extinguishers, as a predecessor to refrigerants, and as a cleaning agent. The central nervous system can be impacted as well as the liver and kidneys when exposed to high amounts of carbon tetrachloride, particularly its vapor. An extended exposure risk can be lethal.

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Answer:

They have different DNA and different physical appearance

Explanation:

Because if the sperms fertilize two different eggs the DNA will be different too and if the sperms are different the physical appearance will be different also

Answer:

Frequency is 2Hz

Explanation:

Glycinate donates an electron pair so it is a bidentate ligand.

The molecular formula is C₂H₄NO₂⁻. The octahedral complex is formed between glycinate molecules and cobalt(III) and the stoichiometry of the complex is [Co(gly)₃]. The reaction is as follows;

Co₃⁺(aq) + 3C₂H₄NO₂⁻ ⇒ [Co(C₂H₄NO₂⁻](aq)

A cobalt complex is formed when 3 glycinate ions equivalents react with one Co₃⁺ ion equivalent so, it is necessary to keep the glycinate ions concentration greater than the cobalt(III) ions at least three times more.

So, taking the concentration 4 times greater can facilitate the reaction.

For a complex whose concentration is 0.015M, 0.06M glycinate ions are required to obtain the desired cobalt(III) glycinate complex.

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Chemical reactions tend to speed up when the concentration of the reactants is increased because all of the above apply. The correct option is d.

When the concentration of reactants is increased, several factors contribute to an increase in the reaction rate.

Firstly, as the concentration of reactants increases, the reactant particles become more crowded, leading to a higher frequency of collisions between them. The more often reactant particles collide, the greater the chances of successful collisions that result in the formation of products. Therefore, an increase in reactant concentration leads to an increase in the collision rate, which can accelerate the reaction.

Secondly, an increase in concentration also means a higher number of reactant particles present in the reaction mixture. This results in an increased likelihood of reactant particles having sufficient energy to overcome the activation energy barrier required for the reaction to occur. As a result, a larger proportion of reactant particles will possess the necessary energy, leading to a higher reaction rate.

Lastly, an increase in concentration generally means a higher number of particles per unit volume. This increased density of reactant particles can lead to more frequent and energetic collisions, as the particles are in closer proximity. The increased energy of collisions further promotes successful reactions and accelerates the overall reaction rate.

In summary, when the concentration of reactants is increased, the reactants collide more often due to increased crowding, move faster due to higher energy, and have greater energy overall. These combined effects contribute to the acceleration of chemical reactions. Therefore, All of the above apply. Option d. is the correct answer.

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If the pressure is increased from 1 atm to 10 atm maintaining the constant temperature of 0℃, Ice will change to liquid water

We know that, pressure is inversely proportional to volume. When pressure in a system increases, the volume would decrease or vice versa.

In the given scenario, the pressure is increased from 1 atm to 10 atm. As the pressure is increased, the volume would decrease.

At 0℃, the volume of ice is higher than the volume of water. The forward reaction is the formation of water which has lower volume from ice. Thus, increasing the pressure would cause the ice to melt and results in the formation of water in liquid state.

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By beta, tungsten 188 decays. The mechanism through which an insecure atomic structure is produced is known as radioactive decay.

The process through which highly unstable molecular nucleus loses its energy through radiation is described as radioactive decay, also characterized as nuclear decay, radiography, radioactivity breakdown, or nuclear disintegration. A substance that has unstable nuclei is regarded as radioactive. For a large variety of human activities, radioactive decay is crucial.

Alpha, beta, and/or gamma rays are all types of ionizing radiation that are released when radioactive atoms decay. Because the energy is powerful enough to dislodge firmly coupled electrons from just an atom's orbit, it is known as ionizing radiation. As a result, the atom develops into a charged ion.

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It would be safer to store a chromium(II) chloride solution in a steel container rather than a zinc container because steel is an alloy primarily composed of iron and carbon.

Chromium(II) chloride is a corrosive substance that can react with metals, and using the appropriate container is crucial for safety and material preservation. In this case, a steel container is the better option because steel is an alloy primarily composed of iron and carbon, which provides enhanced strength and corrosion resistance compared to pure metals. Steel's resistance to corrosion is due to the formation of a passive film on its surface, preventing further deterioration. Additionally, steel containers often have coatings that further increase their resistance to corrosive chemicals like chromium(II) chloride.

On the other hand, a zinc container is more susceptible to corrosion when exposed to chromium(II) chloride. Zinc is an active metal, and its protective oxide layer can be easily disrupted, allowing the chromium(II) chloride solution to attack the metal and compromise the integrity of the container, this reaction could lead to leaks or spills, posing safety hazards and damaging the surrounding environment. In conclusion, for the safe storage of a chromium(II) chloride solution, a steel container is the preferred choice due to its increased strength and corrosion resistance compared to a zinc container.

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To synthesize an alkyl halide through an electrophilic addition reaction, a neutral organic starting material such as an alkene is typically used. The alkene can react with a halogen, such as chlorine or bromine, in the presence of a catalyst like iron or aluminum chloride. The resulting intermediate is an additional product that contains both the halogen and the alkene.

For example, if we start with the neutral organic starting material of propene, we can synthesize the alkyl halide 1-chloropropane through an electrophilic addition reaction with chlorine gas and aluminum chloride as the catalyst:

CH3CH=CH2 + Cl2 → CH3CH(Cl)CH3

The structure of the neutral organic starting material, propene, would be:

CH3CH=CH2

The electrophilic addition reaction involves the double bond in ethene reacting with a halogen molecule (in this case, Br2), resulting in the formation of 1-bromoethane.

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In the Caloric Content of Food lab for Chemistry, you built a simple calorimeter to measure the heat released by burning food items.

A bomb calorimeter is a more advanced device used to measure the heat of combustion of a sample. Both calorimeters have the goal of measuring heat released, but they differ in their design, accuracy, and application.

Similarities:
1. Both calorimeters measure heat released during a reaction.
2. Both are closed systems, preventing the exchange of matter between the system and its surroundings.

Differences:
1. A bomb calorimeter is a more sophisticated and accurate device, while the one built in the lab is simpler.
2. A bomb calorimeter measures heat of combustion by combusting a sample in a sealed, high-pressure container, while the simple calorimeter measures heat released by burning food items in an open system.
3. A bomb calorimeter has a controlled environment, ensuring accurate measurements, while the simple calorimeter is affected by external factors, such as air currents and heat loss.
4. A bomb calorimeter is used in various industries and research, while the simple calorimeter is mainly used for educational purposes.

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Answer:

true

Explanation:

The research titled "Stratospheric Ozone in the 21st Century: The Chlorofluorocarbon Problem" by F.S. Rowland was published in the journal Science in 1991. The study's significance is evident in the way it paved the way for global action on the depletion of the ozone layer.

The study outlined the link between chlorofluorocarbons (CFCs) and the depletion of the ozone layer in the stratosphere. These chemicals have long been utilized in refrigerants, air conditioning systems, foam insulation, and various industrial applications. They have been shown to destroy ozone molecules when they rise to the stratosphere, allowing ultraviolet radiation to penetrate the Earth's atmosphere. Rowland's research proved beyond a doubt that human activity is significantly affecting the ozone layer, resulting in an increased risk of skin cancer, blindness, and other problems associated with exposure to UV radiation.

The research is vital in the sense that it helped to initiate international agreements, such as the Montreal Protocol, aimed at phasing out the use of CFCs. These agreements have been instrumental in lowering the production and use of CFCs, resulting in a reduction in the depletion of the ozone layer. As a result, the world has benefited from a decrease in the risks associated with exposure to UV radiation. In conclusion, Rowland's research was groundbreaking in the sense that it confirmed the link between CFCs and ozone depletion, providing a basis for a global reaction to this critical problem.

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Answer: your weight can change but your mass can't no matter where you go

Explanation:

Answer:

Pore spaces filled with water

Answer:

Fastest C. Reaction time is faster

Slowest A. Reaction time is slower and it takes longer to finish

Explanation:

Answer:

The information from Mariner 6 and Mariner 7

Explanation:

Because they had not been launched yet

Waves are the propagation of particles with or without a medium. Fernando's wave is an example of a transverse wave, and x-rays, gamma rays, and UV rays are indeed examples of waves.

Transverse waves are the type of waves in which the particle oscillates in the perpendicular direction of the transmitted wave direction. The electromagnetic and the seismic waves are the type of transverse waves.

X rays, gamma rays, and ultraviolet rays are electromagnetic waves and have high energy radiations with frequency and wavelengths of their own. As electromagnetic waves are the type of waves hence they all are waves too.

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The correct statement about binding energy is: (B) The binding energy per nucleon of a nucleus with A = 144 is more than the binding energy per nucleon of a nucleus with A = 56.

Binding energy refers to the energy required to disassemble the nucleus into its individual nucleons (protons and neutrons). The binding energy per nucleon is a measure of the stability of the nucleus. A higher binding energy per nucleon indicates greater stability.

In general, as the mass number (A) of a nucleus increases, the binding energy per nucleon also increases up to a certain point. This is because the strong nuclear force, which holds the nucleus together, becomes more effective in binding the nucleons as the number of nucleons increases. Thus, larger nuclei tend to have higher binding energy per nucleon.

Therefore, option B is the correct statement, stating that the binding energy per nucleon of a nucleus with A = 144 is more than the binding energy per nucleon of a nucleus with A = 56.

Option A is incorrect because it compares the total binding energy of nuclei with different mass numbers, which does not necessarily reflect the stability.

Option C is incorrect because it states a specific binding energy value for a Nitrogen isotope, which may not be accurate.

Option D is incorrect because nuclei have different binding energies per nucleon, as explained above.

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Answer:

1). Scientific

2). Plating the diluted bacteria on media that supports the growth of only living micro organisms. Statistically accurate.