what is the equivalence point of the titration? select the correct answer below: the point where the concentrations of the analyte and the titrant are equal the point where the volumes of the analyte and the titrant are equal the point where a noticeable change in appearance occurs the point at which the volume of the titrant solution required for complete reaction with the analyte has been added

In the titration of 2.00 mL of vinegar, it takes 15.32 mL of 0.100M NaOH (aq) to neutralize acetic acid in vinegar. The number of moles of NaOH (aq) is:
The number of moles of NaOH (aq) is 0.001532 moles.

To calculate the number of moles of NaOH (aq), we can use the formula:
moles = volume (L) × concentration (M)
First, convert the volume of NaOH from mL to L:
15.32 mL * (1 L / 1000 mL) = 0.01532 L
Next, multiply the volume by the concentration:
0.01532 L × 0.100 M = 0.001532 moles

Summary: In the titration of 2.00 mL of vinegar, 0.001532 moles of 0.100M NaOH (aq) were used to neutralize the acetic acid in the vinegar.

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In order to demonstrate that intramolecular forces are stronger than intermolecular forces, a block of ice will be heated in a sealed container until it turns into steam.

Because the forces holding together compounds are stronger than the forces holding together molecules, intramolecular forces are stronger than intermolecular forces.

Intermolecular forces exist between molecules, but intramolecular forces exist between atoms within a molecule. This is the primary distinction between intermolecular and intramolecular forces.

Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.

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Further explanation

Given

25 moles of Oxygen(02)

Required The number of molecules

Solution Reaction

2NO+02 → 2NO2

From the equation,

mol NO2: = 2/1 x mol O2 = 2/1 x 25moles = 50 moles

The number of molecules :

\( = 50 \times 6.022 \times 10^{23}\)

\( = 3.011 \times 10{²5}\)

Answer:

A. mass

Explanation:

On edgenuity 2020

The property of matter that is conserved in chemical reactions is mass. The correct option is A.

The law of conservation of mass implies that mass is never be created nor destroyed in a chemical reaction.

The law of conservation of mass, also known as the principle of mass conservation, implies that for any system closed to all transfers of matter and energy.

The mass of the system must remain constant over time, because the system's mass cannot change, and thus quantity cannot be added or removed.

The law of conservation of mass was critical to the advancement of chemistry.

It assisted scientists in understanding that substances did not disappear as a result of a reaction, as they may appear to do, but rather transformed into another substance of equal mass.

Thus, the correct option is A.

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Answer:

Volume is 0.0247L

Explanation:

This question involves the use of Boyle's law which states that the volume of a given mass of gas is inversely proportional to it's pressure provided that temperature remains constant.

Mathematically,

v = k/p

K = VP

P1V1 = P2V2 = P3V3 = .........=PnVn

V = volume

p = pressure

Data;

P1 =1.0atm

V1 = 1.73L

P2 = 70atm

V2 = ?

P1V1 = P2V2

V2 = P1V1 / P2

V2 = (1.0×1.73)/70

V2 = 0.0247L

The volume of the sample is 0.0247L

The compound is polar and the compound is T shaped.

We know that the Lewis structure of a compound tells us the way that electrons are arranged around a central atom in a compound. We can see that the Lewis structure would consist of the central atom and then the atoms that are surrounding the central atom of the molecule.

In any case, the valence electrons that surround each of the atoms in the compound would be shown as dots and they would surround the symbol of the elements to  which the atoms belong. We can now look up at the structure and be able to deduce what the compound can be able to look like.

The compound as shown is polar because of the fact that he compound is non symmetrical.

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There is one Lewis dot in lithium, representing the one valence electron in the outermost shell of the atom.

Lithium is a compound component with nuclear number 3 and image Li. In the Lewis speck design of lithium, the image Li is encircled by a solitary dab, which addresses the one valence electron of the lithium iota. This electron is situated in the peripheral shell of the particle, otherwise called the valence shell, which is the shell that takes part in substance holding. The Lewis dab design of lithium demonstrates that there is just a single valence electron in the iota. The peripheral shell of lithium can oblige up to eight electrons, however lithium will in general lose its valence electron to shape a steady cation with a positive charge of +1.

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In the given chemical equation, oxidation takes place at anode  of the electrochemical cell .

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

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Stars are made of mostly hydrogen and helium, held together by the Sun.

Are stars mostly made of hydrogen and helium?

Massive celestial objects called stars, which are primarily composed of hydrogen and helium, generate light and heat from the churning nuclear forges inside their cores. The other flecks of light we see in the sky, besides our sun, are all light-years away from Earth.

What holds a star together?

The process responsible for a star's luminosity is known as nuclear fusion. The pull of gravity is resisted by the hot gas as it pushes outward. A star is created by this harmony of forces. It maintains the star's structural integrity and maintains its temperature throughout the majority of its lifespan.

What causes stars to group together?

The majority of stars in the Milky Way are found in pairs or clusters of multiple stars, which is consistent with predictions made by three-dimensional computer models of star formation that the collapsing spinning clouds of gas and dust may split into two or three blobs.

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Answer:

Friction, Ability to work and Inertia all increase.

The atomic number of this atom is 3.

Atomic Number =Number of Protons .

Here protons=3, Neutrons=4 and Electrons=3. So, The atomic number of this atom is 3.

The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number (symbol Z). This is equivalent to the proton number (np), or the number of protons present in the nucleus of each atom of that element, for conventional nuclei.

Ordinary chemical elements can be uniquely identified by their atomic number. The atomic number and the number of electrons are both equal in a regular, uncharged atom.

The atomic mass number A of a regular atom is calculated by adding its neutron number N and neutron number Z. Since the mass of electrons is negligible for many uses, protons and neutrons have roughly equal masses, thus the mass defect of a nucleon.

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When calcium (Ca) becomes an ion (Ca2+), the two 4s electrons are lost. Hence, the correct answer is Option a. the 4s electrons.

The electron configuration of an atom refers to the arrangement of its electrons in its atomic shells. The electron configuration of a neutral atom shows its unexcited state's orbitals, where electrons are placed. A calcium ion (Ca2+) has a +2 charge, indicating that it has two fewer electrons than a neutral calcium atom.

The electron configuration of neutral calcium (Ca) is:Ca 1s2 2s2 2p6 3s2 3p6 4s2When calcium (Ca) ionizes, it loses two electrons from the 4s orbital. Calcium cation (Ca2+) configuration is therefore:Ca2+ 1s2 2s2 2p6 3s2 3p6.

An electron configuration shows how the electrons are distributed within an atom's shells. The notation follows a set pattern and starts with the atom's symbol. For example, the electron configuration of oxygen is 1s² 2s² 2p⁴, which shows the arrangement of electrons in its shells.

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The Gibbs free-energy change at 298 K for 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g) is -2.38 kJ/mol and would be negative, so the reaction is spontaneous at all temperatures.

The Gibbs free-energy change can be calculated using the equation:

ΔG = ΔH - TΔS

where ΔH is the enthalpy change, ΔS is the entropy change, and T is the temperature in Kelvin.

ΔH for the reaction is the sum of the enthalpies of formation of the products minus the sum of the enthalpies of formation of the reactants:

ΔH = [2 mol KCl(g) + 3 mol O₂(g)] - [2 mol KClO₃(s)]

ΔH = (-869.6 kJ/mol) - (-924.4 kJ/mol)

ΔH = 54.8 kJ/mol

ΔS for the reaction is the sum of the entropies of the products minus the sum of the entropies of the reactants:

ΔS = [2 mol KCl(g) + 3 mol O₂(g)] - [2 mol KClO₃(s)]

ΔS = (205.2 J/K mol) + (231.0 J/K mol) - (238.7 J/K mol)

ΔS = 197.5 J/K mol

Substituting these values into the equation for ΔG:

ΔG = 54.8 kJ/mol - (298 K)(197.5 J/K mol)

ΔG = -2.38 kJ/mol

Since the ΔG value is negative, the reaction is spontaneous at all temperatures.

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Answer:

cation ca2+ anion cl-

Explanation:

please see the picture your answer is there

The mechanism of action for the citrate synthase 2-part reaction is decarboxylation followed by condensation.

This reaction is the first and the most critical reaction of the Krebs cycle, which is also called the tricarboxylic acid cycle or the citric acid cycle. The Krebs cycle is a series of enzymatic reactions that occur in the mitochondria of eukaryotic cells.

The Krebs cycle is critical in the metabolic process because it oxidizes the pyruvate generated during glycolysis, produces ATP and reduces coenzymes, and ultimately prepares substrates for the electron transport chain. It is a cyclic reaction consisting of eight steps, with citrate synthase catalyzing the first reaction.

The reaction mechanism of citrate synthase is as follows:

The mechanism of action for the citrate synthase 2-part reaction is, therefore, decarboxylation followed by condensation.

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Answer:

D- Release of dust during volcanic eruption

Explanation:

During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere. Injected ash falls rapidly from the stratosphere -- most of it is removed within several days to weeks -- and has little impact on climate change. But volcanic gases like sulfur dioxide can cause global cooling, while volcanic carbon dioxide, a greenhouse gas, has the potential to promote global warming.

answer:

a - decrease in the suns energy.

explanation:

although the other options do discuss climate, temperature, etc., the sun DIRECTLY influences the earth's climate and would most likely affect it on a larger scale. for example, warm and cold ocean currents would affect the temperature of the ocean and could touch bay cities or islands, but they would not dictate the overall climate of the earth :)

♡ hopefully my reply helped you come to an answer~ please keep in mind that my response is purely that... MY response! i still have lots to learn, so please correct/educate me if you have found otherwise ♡

Answer:

a.polar covalent

b.ovalent

c.covalent

d.covalent

Explanation:

a.the atomic number of nitrogen is 7 and atomic number of hydrogen is 1, so the type of bond firmed btw them is called polar covalent

b.The total valence electrons in sulphur atom are 6.thus, one atom of carbon forms two *Covalent bonds* with sulphur atoms each in order to complete it octet. Hence, the bond btw carbon and sulfur us covalent bond

c.The two fluorine atom form a stable F molecule by sharing two element ; the linkage ² is called a Covalent bonds

Answer:

search it

Explanation:

The density of the cube with sides of 2cm and a mass of 100g is 12.5 g/cm³.

How to calculate the density of the cube?

The density of the object is defined as its mass-per-unit volume. In this case, we know the mass of the cube and we can calculate its volume as the cube of the length of its sides.

The volume of the cube is:

V = (2 cm)³ = 8 cm³

Next, The density can be calculated using the following formula:

Density = mass / volume

Density = 100 g / 8 cm³ = 12.5 g/cm³

Therefore, the density of the cube is 12.5 g/cm³.

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Answer:

an element with a large number of valence electrons and a large atomic radius

Explanation:

Electronegativity means a tedency when an atom attracts bonding electrons in a covalent bond situation.

» If an atom has many valency electrons [ empty orbitals in outermost shell ], it has difficulty in attracting electrons hence electronegativity low.

» If an atom is large, its nuclear attraction force of incoming electrons is low hence low electronegativity.

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The element that would have the lowest electronegativity is an element with a small number of valence electrons and a large atomic radius.

Both electronegativity and atomic radius are periodic trends. Electronegativity increases across the period while atomic radius decreases across a period.

An element that has a small number of valence electrons and a large atomic radius will most likely be a metal hence it will have the lowest electronegativity.

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The 95% margin of error for the mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment is ±1.98 (rounded off to two decimal places).

The mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment can be estimated by using the formula;μ = x ± z(\(a^{2}\)) * σ/√n

Where;μ is the population mean increase.x is the sample mean increase.z(\(a^{2}\)) is the z-scoreα is the level of significanceσ is the population standard deviationn is the sample size.

Substituting the given values into the formula;μ = 9.1 ± 1.96 * 5.5/√37= 9.1 ± 1.98

The mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment lies between 7.12 to 11.08.

Hence, the estimated mean increase is between 7.12 to 11.08 millimeters of mercury.

The 95% margin of error can be calculated using the formula;

Margin of error (E) = z(\(a^{2}\)) * σ/√n

Margin of error (E) = 1.96 * 5.5/√37

Margin of error (E) = 1.98 (approximated to two decimal places).

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Nice written.

Is it written by you yourself or you have copied it from somewhere?

Answer: 34.425 g

Explanation:

2.7*12.75=34.425 g

Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.

When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.

This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.

When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.

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The complete question is:

Compare the size of ions to the size of atoms from which they form.

Answer:

8. When using the scientific notation system to express large numbers, move the decimal until one digit(s) remain(s) to the left, then indicate the number of moves of the decimal point as the power of 10.

9. b. Significant figures.

When significant figures are used, the digits are certain plus one uncertain digit.

10. a Kelvin scale, absolute zero.

The Kelvin scale runs to absolute zero which is the lowest theoretical temperature. This measures 0 Kelvins on the Kelvin scale and −273.15°C on the Celsius scale.

Answer:

In a saturated solution of potassium nitrate (KNO3), the rate of dissolution and the rate of recrystallization are equal. This equilibrium state is reached when the amount of KNO3 that dissolves equals the amount that recrystallizes from the solution.

The equilibrium can be influenced by various factors such as temperature and pressure. For example, if you increase the temperature of the solution, the solubility of potassium nitrate increases, meaning that more KNO3 can dissolve before reaching saturation. This would momentarily increase the rate of dissolution until a new equilibrium is reached where the rates of dissolution and recrystallization are equal again, but at a higher concentration of KNO3.

To summarize, in a saturated solution of KNO3, the rate of dissolving KNO3 is equal to the rate of recrystallization of KNO3. This is a characteristic of dynamic equilibrium in solutions.

Answer: 120 mph or 2 mpm

Explanation: 60/5= 12

12*10=120mph

Going 10 miles in 5 minutes means you would be able to go 20 miles in 10 minutes. You would have a total of 12 five minute blocks at 10 miles each. 60 miles in 30 minutes or 120 in 60 minutes.

Or 10 miles in 5 minutes would be 2 miles in 1 minute. (10/5=2)

The electronegativitie of the period-3 element are lited on the tranparency.. Si and Cl  is 0.7, . Mg and S is 1.3,  Si and S is 1.7, Al and P is 1.6.

The electronegativity of the atoms that make up the bond determines whether it is nonpolar or polar covalent. An atom's propensity to draw electrons (or electron density) in its direction is measured by its electronegativity. It controls how the shared electrons between the two atoms in a bond are distributed. The more an atom's electronegativity, the more strongly the electrons in its bonds are drawn to it. In a polar covalent bond, electrons are pushed in the direction of the more electronegative atom; as a result, the atom with the partial negative charge is the more electronegative atom. The electron distribution becomes increasingly polarised and the atoms' partial charges increase with increasing electronegativity differences.

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Answer:

actually i would say but sorry i do not know sorry

Explanation:

Answer:

The energy of a ruby laser that produces red light with a wavelength of 5.00 × 10^-7 m is 3.98 × 10^-19 J.

Explanation:

The energy of a photon is given by the formula E = hf where h is Planck’s constant and f is the frequency of the photon. The frequency of the photon can be calculated using the formula f = c/λ where c is the speed of light and λ is the wavelength of the photon.

Substituting the given values, we get:

f = c/λ = 3.00 × 10^8 m/s / 5.00 × 10^-7 m = 6.00 × 10^14 Hz

E = hf = (6.626 × 10^-34 J s) × (6.00 × 10^14 Hz) = 3.98 × 10^-19 J

Therefore, the energy of a ruby laser that produces red light with a wavelength of 5.00 × 10^-7 m is 3.98 × 10^-19 J.

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