what is the ph of a solution made by mixing 25.00 ml of 0.100 m hi with 40.00 ml of 0.100 m koh? assume that the volumes of the solutions are additive.

The minimum de Broglie wavelength of the ejected electrons = 0.66 nm

The De Broglie wavelength is a wavelength manifested in all of the objects in quantum mechanics which determines the opportunity density of locating the item at a given point of the configuration area. The de Broglie wavelength of a particle is inversely proportional to its momentum.

Frequency = 2. 41×10^15 Hz

Work function =  6. 53 eV = 6. 53 * 1.6 * 10^-19 = 10.45 * 10^-19

ENERGY = Work function +  MAX KINETIC ENERGY

K max = 6.626 * 10^-34 * 2. 41×10^15 - 10.45 * 10^-19

K max = 15.96 *10^-19 - 10.45 * 10^-19

K max = 5.51 * 10^-19

Now, minimum de Broglie wavelength of ejected electron

       λmin= \(\frac{h}{\sqrt{2mKmax} }\)

               = \(\frac{6.626 * 10^-34}{2 * 9.1 * 10^-31*6.25 *10^-19}\)

             =  0.66 nm  answer

Hence, The minimum de Broglie wavelength of the ejected electrons = 0.66 nm

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The volume of the sample \(V_{2} =53ml\)

To determine the new volume of the gas , we do this by assuming that the gas behaves ideally so  We do this by assuming that the gas behaves ideally so we can use the Combined gas laws.

Boyle's Law, Charles Law, and Gay-Lussac Law are combined to form the Combined gas laws. It claims that a constant exists between the ratio of a gas's absolute temperature to the product of its pressure and volume.

\(\frac{P_{1} V_{1} }{T_{1} }=\frac{P_{2} V_{2} }{T_{2} }\)

where P is the pressure, V is the volume, and T is the temperature in Kelvins. We are given the following values:

\(P_{1} =240\:KPa\:,V_{1} =70\:ml,\:T_{1} =300K,\:P_{2} =160\:KPa,\:T_{2} =150K\)

We proceed with the solution by solving it for \(V_{2}\) -

\(\frac{P_{1} V_{1} }{T_{1} }=\frac{P_{2} V_{2} }{T_{2} }\)

\(\frac{P_{1} V_{1} }{T_{1} }\times\frac{T_{2} }{P_{2} }=V_{2}\)

\(\frac{(200KPa).(70ml) }{300K }\times\frac{150K }{160KPa }=V_{2}\)

\(V_{2} =53ml\)

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Answer:

See below.

Explanation:

A dynamic equilibrium in chemistry refers to a situation in which the reaction of reactants to form product(s) in which the products can reverse the reaction by falling apart and back to the reactants.  Reactions that go to completion are irreversible.  In cases where reactants form products (in a forward reaction), but the products can change back into reactants (in a reverse reaction) are called reversible.

An example is the reaction of carbon dioxide with water to form carbonic acid (think soft drinks).

     CO2(g)+H2O(l) ⇌ H2CO3(aq)

As anyone who has opened a warm can of soda knows, it can erupt suddenly and spray anyone nearby with a shower of bubbly, and sticky, soda.  Carbonic acid is unstable and will happily decompose back to it's reactant molecules if given the chance.

Experience tells us what to expect when giving a brother or sister a can of warm soda that you've shaken hard for a minute.  But if you are a chemist, such responses aren't always easy to predict with a new reaction.  Equilibrium constants were developed to provide a means for presdicting the exstent of these reactions.  They are used in equilibrium equations to predict the concentrations of products and reactants, given conditions of temperature and pressure, under defined conditions of temperature and pressure.

The equations themselves include concentrations as the key input.  In the carbonic acid example, if one were to add excessive amounts of one of the reactants, one would expect the equilibrium to "shift to the right."  This simply means that more carbonic acid would be made.  The chances of the forward reaction increase as concentration increases.  The amount of CO2 given off as a gas depends on the concentration of the CO2 in the gas phase, which is given by the partial pressure of the gas.

The space above the soda and the cap represents one place that the CO2(g) can escape the solution.  The CO2 pressure in the gas phase is a measure of it's concentration.  An equilbium calculation takes this concentration in account when decidng how much much of each component is present.  Other compouns that are present may also impact the equilibrium since they may interfere with one of the reaction steps.  Pressure and emperature either dirctly impact the concentration (e.g., gases) or they affect the "effective" concentrations of the compunds.  A higher temperature creates more collisons between reactant molucules that may change the equilibrium constant..

Answer:

it sucks up stuff,cleans around the house,and can be emptied

Explanation:

because its what it is spose to do

Answer:

a space entirely devoid of matter.

Explanation:

Answer:

False.

Compounds can have a charge. A compound is a substance made up of two or more elements that are chemically bonded together. The charge on a compound depends on the number of electrons in the outermost energy level, or valence electrons, of the atoms that make up the compound. If the compound has an equal number of protons and electrons, it will have no charge, and is called a neutral compound.

However, if there is an unequal number of protons and electrons, the compound will have a charge and is called an ionic compound. For example, the compound sodium chloride, NaCl, is made up of positively charged sodium ions and negatively charged chloride ions, and therefore has an overall charge of neutral.

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According to the conservation of mass, the mass of the reactant is always equal to the total mass of products.

According to the rule of conservation of mass, mass is neither generated nor destroyed during a chemical process. On the basis of the conservation of mass, the mass of products will be:

2H₂    +    O₂     →    2H₂O

(5.00g)     (2.30g)     (7.30g)

4P    +    5O₂     →    2P₂O₅

(7.00g)  (8.00g)      (15.00g)

2Al    +    3Cl₂    →    2AlCl₃

(5.40g)  (8.00g)       (13.4g)

P₂O₅    +    2H₂O    →    2H₃PO₄

(0.370g)   (2.50g)          (2.87g)

Thus, these are the resultant masses of products.

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short story about The Blind Date by Jeffrey Archer

The given chemical equation is:

MgCl + Na(OH)₃ → Mg₃(OH)₂ + NaCl

        MgCl + Na(OH)₃ → Mg₃(OH)₂ + NaCl

        3 MgCl + Na(OH)₃ → Mg₃(OH)₂ + NaCl

        3 MgCl + Na(OH)₃ → Mg₃(OH)₂ + 3 NaCl

        3 MgCl + 3 Na(OH)₃ → Mg₃(OH)₂ + 3 NaCl

        3 MgCl + 3 Na(OH)₃ → Mg₃(OH)₂ + 3 NaCl + 6 H₂O

        3 MgCl + 3 Na(OH)₃ → 3 Mg₃(OH)₂ + 3 NaCl + 6 H₂O

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Answer:

Hello! Your answer would be BELOW

Explanation:

So a molten salt powers electricity. Hence, molten sodium chloride conducts electricity due to the presence of free ions. So, the correct answer is option D.      Atoms of sodium and chloride.

Hope I helped! Hope you make an 100%

-Amelia♥

The given statement "Modern vehicles are designed to crush when they crash to absorb kinetic energy" is true. Because, Modern vehicles are designed with safety features that include controlled deformation or "crumple zones" to absorb kinetic energy during a crash. Option A is correct.

These crumple zones are strategically placed in the front and rear of the vehicle and are designed to collapse and deform upon impact.

When a vehicle collides with an object or another vehicle, the kinetic energy of the moving vehicle is converted into various forms of energy, including deformation energy. By allowing certain parts of the vehicle to crush or deform, the kinetic energy is absorbed and dissipated over a longer period of time, reducing the force transmitted to the occupants.

The purpose of designing vehicles to crush during a crash is to enhance occupant safety. By absorbing and dissipating energy through controlled deformation, the impact forces on the occupants are reduced, which can help minimize the risk and severity of injuries.

Hence, A. is the correct option.

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Answer:

fractional bond orders

Explanation:

because fractional bond orders

Answer:

What is the atomic number of neon?

10

What is the atomic mass of neon? Give your answer to the nearest tenth.

20.2

The periodic table is a representation of the periodic elements based on atomic numbers. The atomic number of neon is 10, and the atomic mass is 20.2 amu.

Neon is categorized as a stable gas that belongs to the noble gas group. It has been represented as Ne and is a monoatomic gas with no odor or color. It has an atomic number of 10 and an electronic configuration as, [He] 2s²2p⁶.

The atomic mass of neon elements is 20.2 amu and is said to have full electrons per shell. They do not need to donate or accept any electron as they have a balanced orbital. They have the property of fluorescence and are used in electric signs and lamps.

Therefore, neon is placed in group 18 and has atomic number 10 and a mass of 20.2 amu.

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Answer:

Hot chocolate is as straightforward as drinks go: at its core, it's milk, cocoa powder, and sugar. Despite its simplicity, this cold-weather classic is swirling with science. The backbone of any decent hot chocolate is milk. Beyond water, milk is perhaps the most basic and familiar substance to humans.

The quantity of the limiting reagent determines how many batches of Snickerdoodles are produced. Four Snickerdoodles can be created since cinnamon-sugar has a lower reagent need.

When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant and limiting agent—is the reactant that has been completely consumed. Since the reaction is unable to continue without this reagent, the quantity of product that may be produced is constrained. surplus reagents or surplus reactants are any reagents that are present in amounts greater than those necessary to cause a reaction with the limiting reagent. The quantity of the limiting reagent determines how many batches of Snickerdoodles are produced. Four Snickerdoodles can be created since cinnamon-sugar has a lower reagent need.

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The usage of plastic bags and the level of awareness among people in your locality. Summarize the findings in a report or presentation, highlighting key findings and any recommendations for promoting sustainable alternatives to plastic bags.

As an AI language model, I don't have direct access to real-time data or the ability to conduct surveys. However, I can provide you with a general framework for conducting a survey on the usage of plastic bags and awareness among people. Here are the steps you can follow:

Define your survey objectives: Determine the specific information you want to gather about the usage of plastic bags and people's awareness. This will help you design appropriate survey questions.

Create survey questions: Develop a set of questions that capture the key aspects you want to investigate. These may include questions about the frequency of plastic bag usage, reasons for using or not using them, knowledge about the environmental impact, and willingness to adopt alternatives.

Determine the sample size: Decide on the number of respondents you want to survey. Aim for a sample size that provides a representative perspective of your locality, but keep in mind the practicalities of reaching out to and collecting responses from the selected participants.

Select participants: Randomly select or identify individuals within your locality to participate in the survey. Consider diversifying the sample to include people of different ages, occupations, and backgrounds for a more comprehensive understanding.

Draw conclusions and report findings: Based on the analyzed data, draw conclusions about the usage of plastic bags and the level of awareness among people in your locality. Summarize the findings in a report or presentation, highlighting key findings and any recommendations for promoting sustainable alternatives to plastic bags.

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6KOH + CO₃(PO₄)₂ → 2K₃PO₄ + 3CO(OH)₂

It is a double displacement reaction.

Double displacement reaction- In aqueous solutions, where ions precipitate and exchange occurs, double displacement processes are most common. For instance, a white precipitate of barium sulphate quickly forms when a solution of barium chloride and sodium sulphate are combined. These are ionic-based reactions.

In double displacement reactions, there is simply an ion exchange between the two reactants and no oxidation or reduction of any of the reactants. Double displacement processes are therefore not redox processes.

The positive ions trade partners with the negative ions during double displacement processes. Ionic chemicals that are dissolved in water undergo several double displacement reactions with one another.

Thus it is a double displacement reaction.

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Answer:

Observation

Explanation:

In chemistry a chemist conducts an experiment and he/she concludes some points and arranges information about his/her experiment can be called observation or result

Organizing information in a meaningful way is an example of good management and the proper establishment of the research parameters.

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Answer:

white

Explanation:

A white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce a white precipitate, giving a false positive result. Barium nitrate solution can be used instead of barium chloride solution

Answer:

The colder an object it, the slower the atoms are. This is the rule that affects how cold something can get. There is a limit of how cold something can get though. This is called absolute zero. And, actually, we've gotten very close to it. Scientists in Finland have cooled rhodium atoms to a 10th of a billionth of a degree above absolute zero.

option (B) KOH is the correct answer

KOH is the substance that, when added to the solution, is most likely to raise the pH .

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Chemical chemical X. The silicon is available. This information is not given here. Therefore, we shall use the atomic number as the amount of protons. So, the solution is 17.

A proton, a quasiparticle, is found in the nucleus of every atom.. The particle has an electrical charge that is positive and opposite to the electron's. A single proton would weigh just 1.673? 10-27 kilos if it were isolated, which is only a little bit less than a neutron.

A subatomic particle with a negative charge is an electron. A proton is an unit of matter with the a positive charge. Protons are bound together in an atom's nucleus by the potent nuclear energy. The neutron is a type of subatomic particle sans charge (they are neutral).

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The equilibrium constant (Kc) for the reaction at the given temperature is 54.3. This means that at equilibrium, the concentrations of the reactants and products favor the formation of HI, and the reaction is considered to be product-favored.

The balanced chemical equation for the reaction is:

H2(g) + I2(g) ⇌ 2HI(g)

The expression for the equilibrium constant (Kc) is given by the following equation:

Kc = [HI]2 / [H2][I2]

where [ ] represents the molar concentration of the corresponding species.

To determine the molar concentrations of the reactants and products at equilibrium, we need to use the given masses and the molar masses of the substances. The molar mass of H2 is 2.02 g/mol, I2 is 253.81 g/mol, and HI is 127.91 g/mol.

The number of moles of H2 is given by:

n(H2) = 0.7660 g / 2.02 g/mol = 0.3792 mol

The number of moles of I2 is given by:

n(I2) = 96.80 g / 253.81 g/mol = 0.3812 mol

The number of moles of HI is given by:

n(HI) = 90.20 g / 127.91 g/mol = 0.7052 mol

At equilibrium, the number of moles of H2 and I2 that have reacted are (0.3792 - x) and (0.3812 - x), respectively, where x is the number of moles of HI that has been formed. The number of moles of HI at equilibrium is (0.7052 + 2x).

Substituting these expressions into the equilibrium constant equation and solving for Kc, we get:

Kc = [(0.7052 + 2x)2] / [(0.3792 - x)(0.3812 - x)]

To find x, we use the mass balance equation:

mass(H2) + mass(I2) = mass(HI)

0.7660 g + 96.80 g = (0.7052 + 2x) g

x = 0.3695 mol

Substituting this value of x into the expression for Kc, we get:

Kc = [(0.7052 + 2(0.3695))2] / [(0.3792 - 0.3695)(0.3812 - 0.3695)] = 54.3

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Answer

:yes or no

Explanation:

you needd tol try it yolurself

Thermoluminescence can date sediments and rocks directly

Radiocarbon dating, also known as carbon-14 dating, is a technique used to estimate the age of carbon-containing materials that have been preserved in the last 50,000 years. It is widely used in geology, archaeology, and paleontology.The theory behind carbon dating is straightforward: living organisms absorb carbon from their environment and use it to create new organic compounds. Carbon-14 is a radioactive isotope of carbon that is absorbed by organisms at the same rate as ordinary carbon. Carbon-14 decays at a constant rate, and measuring the amount of carbon-14 in a sample can provide an estimate of how long it has been since the organism died or the carbon-containing material was formed.

Thermoluminescence (TL) dating, on the other hand, is a technique used to date sediments and rocks directly. It is based on the fact that when rocks are heated, they emit light energy. This light energy is trapped within the crystal structure of the rock, and over time, it accumulates. By measuring the amount of light energy trapped within a sample, scientists can estimate how long it has been since the sample was last heated.

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Answer:

no habla espanol

Explanation:

Answer:

Option A. 0

Explanation:

To know the number of lone pair on each H in NH3, we shall determine how NH3 is formed. This is illustrated below:

3H + N —> NH3

Three atoms of Hydrogen, H reacted with 1 atom of nitrogen to produce ammonia, NH3. Each atoms contribute one electron each to form the covalent bond in NH3.

Hydrogen has only one electron and it will share it with the nitrogen atom to produce ammonia.

Further details can be seen in the attached photo.

Further more, in the attached photo, we can see that there is no lone pair of electron in the hydrogen atom as all it's electron has been used to form bond with the nitrogen atom. Only the nitrogen has a lone pair of electron.

Therefore, there are zero lone pair of electron on each hydrogen, H atom in ammonia, NH3.