Acetic acid (mm = 60.05 g/mol) is a monoprotic acid; an amount of acetic acid was dissolved in enough water to make a 10.00 mL solution. Titration of this acid required 18.53 mL of 0.300 M sodium hydroxide. How many grams of acetic acid were used in this titration?

Answer:

Explanation:

Given that:

The argon atoms are excited into an excited state before emitting the 488.0 nm laser.

the energy of the first ionization energy of argon is 1520 kJ mol-1.

SInce 1 eV = 96.49 kJ/mol

Therefore, the energy of the first ionization energy of argon in eV is = ( 1520/ 96.49) eV

=  15.75 eV

To find where  the energy level of the excited state lies below the vacuum energy level, let's first determine, the energy liberated by using planck expression.

\(E = \dfrac{hc}{\lambda}\)

\(E = \dfrac{6.6 \times 10^{-34} \times 3 \times 10^8}{488 \times 10^{-9}}\)

\(E = \dfrac{1.98 \times 10^{-25}}{488 \times 10^{-9}}\)

\(E = \dfrac{1.98 \times 10^{-25}}{488 \times 10^{-9}}\)

\(E =4.057 \times 10^{-19} \ J\)

Converting Joules (J) to eV ; we get,

\(E =\dfrac{4.057 \times 10^{-19}}{1.6 \times 10^{-19}}\)

E = 2.53 eV

The energy levels of the first exited state = -13.223 eV

The mass of the carbon dioxide is  49.72 g from the calculation done.

The phrase "mole fraction," which is often referred to as "molar fraction" or "amount fraction," is used to describe the proportions of a mixture's components. It is an intangible quantity that expresses the proportion between the moles of a given component and the total moles in the combination.

We know that;

Number of moles of ethanol = 9.2/46 g/mol

= 0.2 moles

Now;

Number of moles of water = 216.0 g/18 g/mol

= 12 moles

Mole fraction of water = Number of water/ Total number of moles

0.9 = 12/12 + 0.2 + x

0.9(12.2 + x) = 12

10.98 + 0.9x = 12

x = 1.13 moles

Now;

Moles = mass/Molar mass

1.13 = x/44

x = 49.72 g

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Answer:

D. Each jar contains the same number of atoms

Explanation:

Each of jar containing 1 mole of the element has consisted of an equal number of atoms.

Each jar has been consisted of 1 mole of gas. The number of atoms in a mole of gas can be calculated with Avogadro's number.

Avogadro number has been the constant, that relates the particles and the sample constituents. The value of the Avogadro number has been \(\rm 6.023\;\times\;10^2^3\) .

1 mole of gas = Avogadro's number molecules

Thus, each of them containing 1 mole of the element has consisted of an equal number of atoms.

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The quantity of moles in 57.0grams of RbF is 0.545mol.

Moles is the base unit of amount of substance i.e. the amount of substance of a system which contains exactly 6.022 × 10²³ elementary entities (atoms, ions, molecules, etc.).

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.

No of moles = mass ÷ molar mass

Molar mass of RbF = 85.467 + 18.998 = 104.5g/mol

moles = 57.0g ÷ 104.5g/mol = 0.545mol

Therefore, 0.545moles is the quantity of moles of RbF in 57.0grams of the compound.

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Solution :

It is given that a now-a-days many of the health clubs and the gyms provides steam saunas with the help of heated rocks in a container. When water is poured in to these heated rocks, steam is being produce.

This is because the energy conversion takes place in this process. The hot rocks have high temperatures and possess heat energy in them. So when cold water is poured in to the rocks, the cold water absorbs the heat energy from the rocks and is converted in to hot vapor by converting heat energy in to vapor energy or steam energy by the process of vaporization.

Answer:

the structure of an atom, theoretically consisting of a positively charged nucleus surrounded and neutralized by negatively charged electrons revolving in orbits at varying distances from the nucleus, the constitution of the nucleus and the arrangement of the electrons differing with various chemical elements.

Explanation:

In a drought-stricken area where city dwellers and farmers compete for water resources, both sides have valid claims for prioritizing their needs. it is essential for policymakers to consider both sides' needs and work towards a balanced and sustainable solution for water allocation.

1. Farmers:
- Agriculture is essential for food production, and without sufficient water, crops will not grow, leading to potential food shortages.
- The livelihood of farmers depends on the success of their crops, so prioritizing their water needs is crucial for their economic well-being.
- Supporting agriculture may have positive effects on the local economy, as it provides jobs and resources for other industries.
2. City dwellers:
- Water is necessary for basic human needs, such as drinking, cooking, and hygiene, so ensuring an adequate supply for city dwellers is essential for maintaining public health.
- Urban populations often have limited alternatives for water sources, unlike farmers who may have access to wells or other natural resources.
- Prioritizing city dwellers' water needs may be seen as supporting a larger population, given the higher population density in urban areas.
To resolve such disputes, it is essential for policymakers to consider both sides' needs and work towards a balanced and sustainable solution for water allocation. This may involve implementing water conservation strategies, developing alternative water sources, or investing in more efficient agricultural practices.

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1) Write the chemical equation.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 1

Cl: 1

List the elements (or polyatomic ions) in the reactants.

K: 1

P: 1

O: 4

H: 3

Cl: 1

2) Balance K.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 1

Cl: 1

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

3) Balance Cl.

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

List the elements (or polyatomic ions) in the reactants.

K: 3

P: 1

O: 4

H: 3

Cl: 3

4) The balanced chemical equation.

.

Answer:

Deductive reasoning  (Brainliest please)

Explanation:Deductive reasoning begins with a general principle and a prediction based on this principle; the prediction is then tested, and a specific conclusion can then be drawn. The first step in the process of inductive reasoning is making specific observations.

Answer:

Electrons are not considered.

Explanation:

An electron's mass is around 9.1 * 10^-31 kg, whereas the mass of protons and neutrons is around 1.7 * 10^-27 kg. Since electrons are about 1000x smaller than protons and neutrons, they are not considered to contribute significantly to the atomic mass.

The reagents are H2, Pd/C at step 1 and H2, Lindlar's cat at step 3. The reactants are 1.1) NaNH2, 1.2) 1-bromo-2 methylpropane, 2.1) NaNH2, 2.2) 2 butanone, and 2.3) H+.

When the base H2, Pd/C reagent reacts with any NaNH2, an acidic proton is initially abstracted, leaving carbon with a negative charge that will be counterbalanced by any plus. Now, this alliance will attack the chemical one bromo three methylpropane from the back, releasing a negative. And substance B is created. NaNH2 and Compound B will react. There is acidic hydrogen compound B present, and NaNH2 will eliminate it. 2 Butane reacts with hydrogen that is acidic  to produce Compound C which further reacts with reagent H2, Lindlar's cat to produce final product.

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Gauss's law and the sum of electric fields we can find that the variation of the force has as response:

the electric field is a vector field that indicates the force on a point test charge

Gauss's law is a method to calculate the electric field when the charges have some symmetric

             Фl =∫ E. ds = \(\frac{q_{int}}{\epsilon_o}\)

The bold letters indicate vectors, fi is the electric field flux, E the field value and ds the area differential of a Gaussian surface.

The Gaussian surface is an imaginary surface at the point where the field is calculated, the shape of this surface should be selected to simplify calculations.

In this case suppose that the plates are very large, so the Gaussian surface is a cylinder with the base parallel to the plane. For this surface the normal is parallel to the field lines so the scalar product is reduced to the algebraic product

             2E A =  \(\frac{q_{int}}{\epsilon_o}\)  

The number two is due to the fact that the field is emitted towards both sides of the plate, if we use the concept of surface density

               σ = \(q_{int}\) / A

                \(q_{int}\) = σ A

              2 E A = σ A / ε₀

                E = \(\frac{\sigma }{2 \epsilon_o }\)

in the case of the plate with a positive charge the field leaves the plate and in the case of the negative plate the field enters the plate, we can see that the two fields point in the same direction so they must be added

              E_ {total} = 2 E

              E_ {total} = \(\frac{\sigma }{\epsilon_o}\)  

The electric force is

                  F = q E

                  F = q   \(\frac{\sigma }{\epsilon_o}\)

From this expression we see that the force is constant and does not change with the position of the cars

In conclusion, using Gauss's law and the sum of electric fields, we find that the answer is:

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Answer:

29/43

Explanation:because of the numbers

25.46 mL x NaOH times 1L NaOH times/    1,000 mL of NaOH  x  0.959 moles NaOH/ 1 L NaOH    1 mole EqualsH2SO4/2 moles NaOH =    0.0122 moles H2SO4                                                    

 Moles + Molarity/  L

 201.7 milliliters H2SO4    1 liter  H2SO4 /  1000 mL H2SO4 = 0.2017 liters.H2SO4.      

molarity =  0.0122 moles.H2SO4/  0.2017 L H2SO4 =  =  0.0605 M H2SO4.

One mole of H2SO4 will be present in a liter of a 1 M solution of the acid, but when the solution is titrated with a base, it is revealed to contain two moles of acid. This is due to the fact that each H2SO4 molecule has two acidic protons (H+ Ions). A 1 M solution of H2SO4 will be 2 N as a result.

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: M = liters of solution/moles of solute

The number of moles of protons in the solution is a measure of normality. Each H2SO4 molecule has 2 protons available to react, so 2 N is the normality.

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Answer:

2.77495 moles

Explanation:

Boron= 10.811g (according to periodic table)

\(33g*\frac{1mole}{10.811g B}=2.774951 moles B\)

Answer:

66.7 g

Explanation:

Number of atoms = 2×10²¹

Mass of 2×10²¹ atoms = 0.4 g

Mass of 0.5 moles of that element = ?

Solution:

1 mole contain 6.022×10²³ atoms

2×10²¹ atoms × 1 mol / 6.022×10²³ atoms

0.33×10⁻² mol

0.003 mol

 0.003 mole have mass of 0.4 g

0.5 mol have mass 0.5/0.003×0.4 g = 66.7 g

Answer:

Finally, coagulation occurs and reinforces the platelet plug with threads of fibrin which are like a molecular binding agent. The hemostasis stage of wound healing happens very quickly.

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

Answer:

electrons are combining with other electrons

Answer:

Pb

Explanation:

Answer:

Pb is the answer You're looking for

The freezing point of the solvent in a solution changes as the concentration of the solute in the solution changes (but it does not depend on the identity of either the solvent or the solute(s) particles (kind, size or charge) in the solution).

Generally, pressures lower than 1 atmosphere lower the temperature at which a substance freezes, but for water, a higher pressure gives a lower freezing point. The force from a pressure change figures into the molecular forces already at play in a substance.

Answer:

1). Carbon dioxide.

Nitoge dioxide.

2). Through photosynthesis.

Answer:

11

Explanation:

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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The most typical solution is a 0.25 molar (M) HCl solution, which has exactly 0.25 moles of HCl in it. Per litre of this solution, 0.25 moles of HCl are present. Calculating the mass of HCl required to produce one litre of 0.25 M HCl solution is the first step in making this solution.

The molar mass of HCl (36.46 g/mol) must be multiplied by 0.25 moles to get this. As a result, we get 9.115 grammes of HCl in total mass. This quantity of HCl needs to be dissolved in one litre of water in order to make the solution.

This will result in a solution of 0.25 M HCl, or exactly 0.25 moles of HCl. It's critical to understand that a solution's concentration It's crucial to understand that a solution's concentration and its solute content are two different things.

For instance, an HCl solution at 0.5 M does not contain twice as much HCl as one at 0.25 M. It has twice as much solute in the same amount of solution, though. As a result, 0.5 moles rather than 0.25 moles of HCl are present in a 0.5 M solution.

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Answer:

Chemical reactions in living things are the chemical processes that occur within living organisms to maintain their biological functions. These reactions are essential for metabolism, growth, reproduction, and response to stimuli. They involve the conversion of one or more substances into new substances with different physical and chemical properties.

Some examples of chemical reactions in living things include:

Cellular respiration: the process by which cells convert nutrients into energy in the form of ATP. This process involves the oxidation of glucose to produce carbon dioxide, water, and ATP.

Photosynthesis: the process by which plants and other organisms convert light energy into chemical energy in the form of glucose. This process involves the conversion of carbon dioxide and water into glucose and oxygen.

Digestion: the process by which food is broken down into simpler substances that can be absorbed and used by the body. This process involves the hydrolysis of complex carbohydrates, proteins, and lipids into simpler molecules such as glucose, amino acids, and fatty acids.

DNA replication: the process by which cells make copies of their DNA before cell division. This process involves the synthesis of new strands of DNA from existing strands.

Chemical reactions in living things are regulated by enzymes, which are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur. Enzymes are specific to particular substrates and are critical for the proper functioning of metabolic pathways. Any disruption in these chemical reactions can lead to metabolic disorders and diseases.

Explanation:

Answer: 3.984 L

Explanation:

Answer:

4426.70 atm

Explanation:

pv = nrt

p = nrt/v

p = (5.8 * 8.3144598 * 358) / 3.9

p = 4426.70 atm

The temperature and pressure of the left box is 250c (298 K), and 1 atm pressure.

The right box is at standard temperature and pressure.

Standard temperature and pressure is 00c (273.15 K) and 1 atm.

Hence, the pressure is the same, therefore the position is piston will be the same as the left figure.

At constant pressure, volume is directly proportional to absolute temperature.

\(V \propto T .\)

Now, as the temperature at the right box is less than 250c that of the left box, hence the volume decreases significantly.

The arrangement of molecules in the right box will be closer.

A diagram of the right box is given below.

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To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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