The molarity of the unknown H3PO4 solution is 0.0576 M. The balanced chemical equation for the reaction between H3PO4 and Ca(OH)2 is:
H3PO4 + 3Ca(OH)2 → Ca3(PO4)2 + 6H2O
From the equation, we can see that 1 mole of H3PO4 reacts with 3 moles of Ca(OH)2. Therefore, the number of moles of Ca(OH)2 used in the titration is:
moles of Ca(OH)2 = 0.185 M x 0.03266 L
= 0.0060521 mol
Since the stoichiometric ratio of H3PO4 to Ca(OH)2 is 1:3, the number of moles of H3PO4 in the sample is:
moles of H3PO4 = 0.0060521 mol ÷ 3
= 0.0020174 mol
The volume of the sample is 35.00 mL or 0.03500 L. Therefore, the molarity of the H3PO4 solution is:
Molarity of H3PO4 = moles of H3PO4 ÷ volume of sample in liters
= 0.0020174 mol ÷ 0.03500 L
= 0.0576 M
Therefore, the molarity of the unknown H3PO4 solution is 0.0576 M.
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What is the total pressure exerted by a mixture containing two gases if the partial pressure of one gas is 70 kPa and the partial
pressure of the other gas is 30 kPa?
A) 70 kPa
B) 40 kPa
100 kPa
D) 30 kPa
Answer:
C) 100 kPa
The total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas. In this case, the partial pressure of the first gas is 70 kPa and the partial pressure of the second gas is 30 kPa. Therefore, the total pressure exerted by the mixture is 70 kPa + 30 kPa = 100 kPa. The answer is C) 100 kPa.
Explanation:
Under what conditions is the ideal gas assumption suitable for real gases select all that apply?
The ideal gas law is a powerful tool for predicting the behavior of gases under a variety of conditions.
According to the ideal gas law, gases will behave most like an ideal gas when they are at low pressures and high temperatures.
This means that when the pressure is low and the temperature is high, the molecules of the gas will have more space to move around and they will have higher average speeds.
Under these ideal conditions, the gas will behave according to the predictions of the ideal gas law.
Additionally, the gas particles must be small and non-interacting, meaning that they do not interact with each other. When these factors are taken into account, a gas will most likely display the ideal gas properties predicted by the ideal gas law.
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Earth's gravity is not strong enough to overcome the moon's__
Answer: orbit?
Explanation:
Which is a distinction between an epidemic and a pandemic?
A.
the species of organisms infected
B.
the geographical area affected
C.
the symptoms of the disease
D.
the season in which the disease spreads
Answer:
B.
a pandemic would be like COVID-19 as it spread world wide
a epidemic would be like Japanese small pox incident because it was mostly in Japan
Define in your own words energy transfer
Answer:
The conversion of one form of energy into another, or the movement of energy from one place to another.
Explanation:
hope this helps
Movies | Aldah - Watch Free Movie.. GoStream 123m Watch Angeles In the laboratory a "coffee cup calorimeter or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction Since the cup itself can absorb energy, a separate experiment is needed to determine the heat capacity of the calorimeter. This is known as calibrating the calorimeter and the value determined is called the calorimeter constant One way to do this is to use a common metal of known heat capacity. In the laboratory a student heats 95,37 grams of copper to 99.24 °C and then drops it into a cup containing 78.54 grams of water at 22.14 °C She measures the final temperature to be 29.85 °C Using the accepted value for the specific heat of copper (See the References tool), calculate the calorimeter constant Calorimeter Constant = 1°C NEC DOLL Priser sert
A student heats 95.37 grams of copper to 99.24 °C and then drops it into a cup containing 78.54 grams of water at 22.14 °C She measures the final temperature to be 29.85 °C . The calorimeter constant is 1°C.
Given that :
Mass of copper = 95.37 g
Heat capacity = 0.44 J/ g °C
Temperature = 99.24 °C
Final temperature = 29.85 °C
Q copper = m c × ΔT
= 95.37 × 0.44 × -69.39
= - 2773.8 J
Mass of water = 78.54 g
Heat capacity = 4.18 J/g °C
Q = 78.54 × 4.18 × 7.71
Q = 2787.6J
Q calorimeter = 13.8 J
Calorimeter constant = 13.8 J / 7.71 °C
= 1 °C
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how many orbitals are in the 3rd principal energy level
The number of orbital in the third principal energy level nine.
What is principal energy level?
Principal energy level is a space that divide nucleus atom into a region with a certain levels. each of them has one sub level that contain only one s- orbital. In the s- orbital, the total electron available is 2 and determine as the lowest level because it is contain the lowest electrons. Each principal energy level after first energy level has one s- orbital with 3 p-orbital. Hence the third principal energy level contain 1 s- orbital, 3 p-orbital and 5 d-orbital or 1 + 3 + 5 total orbital. So, the total orbital of this level is 9.
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HELP ASAP
If a steel nail is wrapped 8 times with an insulated copper wire and each end of is attached to a 1.5 V single-A battery we find that it will lift the weight of 2 paper clips. Hypothesis: If 8 more coils are added to the nail we will be able to pick up twice as many paper clips. When we ran the experiment, we observed and recorded that when we added 8 more wraps around the nail (16 coils) we could lift 4 paper clips and when we added 8 more wraps (24 coils) we could lift 6 paper clips. Which of the following is/are true?
I. Something went wrong with the experiment since it didn't give us the results we expected.
II. The hypothesis was supported with the results of the experiment.
III. It can be concluded that every time 8 wraps are added to the nail, the total number of paper clips lifted doubles.
II and III only
II only
I only
I and III only
Based on the relationship between the number of turns of the coils and the strength of an electromagnet, the true options are:
The hypothesis was supported by the results of the experiment:
The correct option is II only.
What is the relationship between the number of turns of the coils and the strength of an electromagnet?The strength of the electromagnet rises with the number of turns in the coil.
This is due to the fact that as the coil "cuts" through the magnetic field, the sum of the individual emf s created by each turn increases with the number of coils turns.
The relative speed between the coil and magnet, as well as the magnet's strength, are additional elements that influence the strength of the induced current in a dynamo in addition to the number of coils. The intensity of the generated current increases with magnet strength and relative speed.
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A battery contains two metals that have different tendencies to attract electrons. If one is lithium with an electron affinity of −3.05, and the other is zinc with an electron affinity of −0.76, describe how the electrons will flow. Then, describe how you could make this an even stronger battery.
This battery could be made stronger when we make lithium the anode and make zinc the cathode.
What is the electron affinity?We know that the term electron affinity has to do with the fact the a specie is able to attract electrons. Hence, the specie that can be able to attract electrons is said to be have a greater electron affinity.
If we look at the order of the reactivity of the metals, we can see that the lithium has more tendency to exist as a positive ion as such the electron affinity of the lithium atom is very negative and it does not attract electrons.
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give the product of the bimolecular elimination from each of the isomeric halogenated compounds.
An example of the bimolecular elimination from the isomeric halogenated compound would be of Dehalogenation of 1,2-dibromoethane to form ethene and hydrogen bromide: H3C-CH2-Br2 --> H2C=CH2 + HBr.
Bimolecular elimination is a chemical reaction where two molecules react to form a new molecule and a neutral molecule. Isomeric halogenated compounds are compounds that have the same molecular formula but different structural arrangements.
For example, 1,2-dibromoethane and 1-bromo-2-chloroethane are isomers. Bimolecular elimination of these compounds can produce ethene and hydrogen halide (HBr or HCl) as the products. The specific product will depend on the isomeric halogenated compound and the reaction conditions.
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Which statement is correct about the total mass of glucose formed during photosynthesis? (1 point) a It is equal to the total mass of carbon dioxide and oxygen used. b It is equal to the total mass of carbon dioxide and water used. c It is less than the total mass of carbon dioxide and water light used. d It is greater than the total mass of carbon dioxide and water used.
It is equal to the total mass of carbon dioxide and water used" as the substrates (CO2 and H2O) are just merely converted to the products (C6H12O6 and O2) with no mass being consumed or used as fuel for the reaction. In this reaction, energy is well conserved. The correct option is B
What is photosynthesis?Photosynthesis can be defined as the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Therefore the primary function of photosynthesis is to convert solar energy into chemical energy and then store that chemical energy for future use.
The balanced equation of photosynthesis is: 6CO2 + 6H2O + light energy = C6H12O6 + 6O2.
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The image above shows the inner planets which plan is represented by the number two?
Answer:
Venus
Explanation:
From the sun outwards is Mercury Venus Earth and then Mars
Given 0.32 moles of H2O how many moles of H2 are needed
Answer:
0.32 moles of H2
Explanation:
I will assume the question concerns the production of water from hydrogen and oxygen(?). If theis is correct, start with a balanced chemical reaction.
O2 + 2H2 = 2H2O
2 O and 4 H on both sides of the reaction: it is balanced.
The balanced equation tells us we need 2 moles of H2 for every 2 moles of H2O, a 1:1 molar ratio. If we want 4 moles of H2O, we'd need 4 moles of H2.
If we want 0.32 moles of H2O, we need 0.32 moles of H2.
Which of the following prevent watershed pollution?
options:
A: cutting down trees
B: flushing the toilet
C: picking up litter and pet waste
D: using a broom instead of a hose to clean sidewalks
Choose all that apply
Everyday, save water. Reduce the length of your showers, patch any leaks, and switch off the flow when you're not using it. Instead of disposing of hazardous household chemicals into the drain, transport them to the a hazardous waste facility. Use resilient plants in your yard that require little to no watering, fertilizer, or pesticides.
What three categories do pesticides fall under?Arthropods, including insects, are killed by insecticides. Mites can feed on both plants and animals are eliminated with miticides, also known as acaricides. Microorganisms known as microbial pesticides can kill, prevent, or outcompete pests like insects or even other microorganism pests.
Do pesticides harm people?Pesticides can have both acute, or short-term, negative health impacts, and chronic, or long-term, consequences, which can develop years or months after exposure. Examples of immediate health consequences include eye stinging, blisters, rashes, blindness, nausea, lightheadedness, diarrhea, and even death.
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Answer: The answer is : using a broom, and picking up litter and pet waste.
Explanation: I just took the test and got a 100%,! that was my answer.
ct.
the
2.
16 Calculate For a more difficult training session, the
mass to be pushed is increased to 160 kg. If the
players still push with a force of 150 N, what is the
acceleration of the object?
Use Newton's law:
F = ma
150 N =
HWHO () ……..
The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.
From the formula:
F = ma
a = F/m
a = 150/160
a = 0.9375 m/s²
Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.
How would you define Force?The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.
What is the SI unit of Force?The SI unit of force is the newton, symbolised as N. The base units suitable to force are: metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.
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The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.
How would you define Force?The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.
From the formula:
F = ma
a = F/m
a = 150/160
a = 0.9375 m/s²
Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.
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step 1 says to always add water to the tube first, then add additional reagents. Why do you suppose this is the case?
What color wavelength does 590 nm represent? Why is this wavelength chosen and how does this wavelength correspond with the color of bromophenol blue? What subatomic particle is responsible for the absorbance at this wavelength?
How should the absorbance of the 1:50 dilution compare with the dilution at 1:100?
What is the extinction coefficient (or molar absorbtivity constant) for the bromophenol blue?
Part 1 is divided into two sections, A and B. Which section address the accuracy of the pipetted volumes? Which section addresses precision of the pipetted volumes? Which statistical quantity would you use to discuss precision? Which statistical quantity would you use to discuss accuracy?
Yellow color represent 590 nm.
What happens in absorption spectra?The atoms in a cold, diluted gas absorb light at particular frequencies, producing an absorption spectrum. Black lines (absence of light) are produced in the spectrum because the re-emitted light is unlikely to travel in the same direction as the absorbed photon.
When switching between two states, an atom, ion, or molecule absorbs photons with energies equal to the difference in the energies of the two states. The outcome is an absorbance spectrum showing the intensity of emission as a function of wavelength.
There are two types of absorption processes: chemical and physical, depending on whether the solute and solvent undergo a chemical reaction.
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how do you write/ draw a Lewis structure for N?
Lewis dot structure is given in photo .
What is lewis dot structure ?
A Lewis point structure is a type of diagram used to show the distribution of electrons within a molecule or ion. This structure was first introduced in 1916 by chemist Gilbert N. Lewis. The structure consists of dots representing electrons surrounding the chemical symbols of the atoms in the molecule, indicating the number of bonds each atom can form. The dots are placed in pairs around the element symbol and represent the valence electrons (the electrons at the outermost energy level) of that element. The number of valence electrons of an element can be obtained from the periodic table.
Lewis point structures are used to predict the number and type of bonds that form between atoms in a molecule and to predict the shape of the molecule. By connecting the points of different elements in a molecule, the lewis structure can be used to determine the bond order, or the number of bonds between two atoms. Information about bond order, combined with the arrangement of atoms in space, can be used to determine the molecular structure of a molecule.
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Consider the given plot of absorbance vs. concentration. Which line is the best-fit line to represent the black data points? Absorbance А B 1 0.9 0.8 С 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.1 0.5 0.6 0.2 0.3 0.4 Concentration Select one: Blue line (C) O Green line (A
For the given plot of absorbance vs Concentration, the purple line is the best-suited line to characterize the black statistics points.
What is Concentration?In chemistry, concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution. Concentration is usually expressed in terms of mass per unit volume. However, the solute concentration may also be expressed in moles or units of volume. Instead of volume, concentration may be per unit mass. While usually applied to chemical solutions, concentration may be calculated for any mixture.Two related terms are concentrated and dilute. Concentrated refers to chemical solutions that have high concentrations of a large amount of solute in the solution. If a solution is concentrated to the point where no more solute will dissolve in the solvent, it is said to be saturated. Dilute solutions contain a small amount of solute compared with the amount of solvent.In order to concentrate a solution, either more solute particles must be added or some solvent must be removed. If the solvent is nonvolatile, a solution may be concentrated by evaporating or boiling off solvent.
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(part 1 of 2)
Hydrogen and oxygen react under a specific
set of conditions to produce water according
to the equation
2 H2(g) + O2(g) −→ 2 H2O(g).
How much hydrogen would be required to
produce 7.5 mol of water?
Answer in units of mol. Answer in units of
mol.
(part 2 of 2)
How much oxygen would be required?
Answer in units of mol. Answer in units of
mol.
Answer: part 1 of 2
1. The amount required of H₂ = 11.0 g.
2. The amount required of O₂ = 88.0 g.
Explanation:
The balanced equation for the mentioned reaction is:
2H₂(g) + O₂(g) → 2H₂O,
It is clear that 2.0 moles of H₂ react with 1.0 mole of O₂ to produce 2.0 moles of H₂O.
Q1: How much hydrogen would be required to produce 5.5 mol of water?
Using cross multiplication:
2.0 mol of H₂ produce → 2.0 mol of H₂O, from stichiometry.
??? mol of H₂ produce → 5.5 mol of H₂O.
∴ the no. of moles of H₂ needed to produce 5.5 mol of water = (2.0 mol)(5.5 mol)/(2.0 mol) = 5.5 mol.
Now, we can get the mass of H₂ needed to to produce 5.5 mol of water:
mass of H₂ = (no. of moles)(molar mass) = (5.5 mol)(2.0 g/mol) = 11.0 g.
Q2: How much oxygen would be required?
Using cross multiplication:
1.0 mol of O₂ produce → 2.0 mol of H₂O, from stichiometry.
??? mol of O₂ produce → 5.5 mol of H₂O.
∴ the no. of moles of O₂ needed to produce 5.5 mol of water = (1.0 mol)(5.5 mol)/(2.0 mol) = 2.75 mol.
Now, we can get the mass of O₂ needed to to produce 5.5 mol of water:
mass of O₂ = (no. of moles)(molar mass) = (2.75 mol)(32.0 g/mol) = 88.0 g.
The compound diborane (B2H6) was at one
time considered for use as rocket fuel. Its
combustion reaction is B2H6(g) + 3 O2(ℓ) → 2 HBO2(g) + 2 H2O(ℓ)
The fact that HBO2, a reactive compound,
was produced rather than the relatively inert
B2O3 was a factor in the discontinuation of
the investigation of the diborane as a fuel.
What mass of liquid oxygen (LOX) would be
needed to burn 134.8 g of B2H6?
The mass of liquid oxygen needed to burn 134.8 g of B2H6 is 84.41 mL LOX.
What is liquid oxygen?Liquid oxygen is a form of oxygen in its liquid state. It is a colorless, odorless, and highly reactive substance that is composed of two oxygen atoms bonded together. It can be made by cooling oxygen gas in a cryogenic process to temperatures below -297°F (-183°C).
The combustion reaction of diborane requires 3 moles of oxygen for every 1 mole of diborane, so the mass of oxygen required to burn 134.8 g of B2H6 (1 mole) is:
3 moles of O₂ x (32.00 g/mol O₂) = 96.00 g of O₂
Since liquid oxygen (LOX) has a density of 1.141 g/mL, the mass of liquid oxygen needed to burn 134.8 g of B2H6 is:
96.00 g O₂ ÷ 1.141 g/mL = 84.41 mL LOX
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Show work worth
Show work 10 points
Particle of Cu that Johnny produce is 2.7521 x 10²³ particles
A substance's mole is equivalent to 6.022 × 10²³ of that material (such as atoms, molecules, or ions). The term "Avogadro's number" or "Avogadro's constant" refers to the number 6.022 × 10²³.
To calculate the number of particles, first we Should calculate the moles of Cu
Moles of Cu = mass / mass molar
Moles of Cu = 29.02 g / 63.5 g/mole
Moles of Cu = 0.457 moles
The we can calculate the particle Cu that johnny produce
Particle Cu = moles x avogadro's number
Particles Cu = 0.457 moles x 6.022 x 10²³
Particles of Cu = 2.7521 x 10²³ particles
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What is the value of H-C-H bond angle in ethylene?
The value of the H-C-H bond angle in ethylene is 117°.
The bond angle is a geometric angle that is formed due to the repulsion between atoms or electrons in a bond. The binding angle for a linear molecule is 180°, for a triangular planar molecule it is 120°, and so on.
The size of the bond angle is affected by the magnitude of the repulsive force of electron pairs in the molecule. The lone pair has a slightly stronger repulsive force than the bonding pair. This happens because the lone pair of electrons is only bound to one atom, so the movement is more flexible.
Determine the bond angles using VESPR theory, such as if the shape of the molecule AX means that it is linear with a bond angle of 180 degrees.
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What foods, if any, only consist of one type of saccharide?
Answer: pears, oatmeal, green beans, corn, oranges, black beans,bananas, asparagus
According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus?
According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus is specific allowed orbits.
What is orbits?Encyclopedic entry. An orbit is a regular, repeating path that one object takes around another object or center of gravity. Orbiting objects, which are called satellites, include planets, moons, asteroids, and manmade devices.An orbit is a regular, repeating path that one object takes around another object or center of gravity. Orbiting objects, which are called satellites, include planets, moons, asteroids, and manmade devices.Objects orbit each other because of gravity. Gravity is the force that exists between any two objects with mass. Every object, from the smallest subatomic particle to the largest star, has mass. The more massive the object, the larger its gravitational pull. Gravitational pull is the amount of force one object exerts on another object.
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Quincy uses the quadratic formula to solve for the values of x in a quadratic equation. He finds the solution, in simplest radical form, to be x = startfraction negative 3 plus or minus startroot negative 19 endroot over 2 endfraction. Which best describes how many real number solutions the equation has?.
x = [-b (b2 - 4ac)]/2a is the solution to the quadratic equation ax2 + bx + c = 0. By using the plus and minus symbols in this formula, we are able to determine the two values of x. In light of this, there are two plausible values for x: [-b + (b2 - 4ac)]/2a and [-b - (b2 - 4ac)]/2a.
Which equation has all real numbers as solutions?The simplest definition of a real solution in algebra is a solution to an equation that is a real number.
ax2 + bx + c = 0 is the quadratic equation's conventional form.
Since the discriminant is negative, the equation has zero real number solutions in its simplest radical form.
A linear equation is an identity if it can be solved by finding the solution to a true assertion, such as 0 = 0. All real numbers make up its solution set.
On both sides of the equation, combine like terms. Subtract x from both sides to isolate the x word. You reach the correct result, "3 Equals 3." It indicates that the equation's answer when you arrive at a true statement like this.
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What is the origin of replication Mcq?
The origin of replication (ORI) is a specific location on a DNA molecule where replication, the process of duplicating the DNA, begins.
The ORI is a unique sequence of nucleotides that serves as a starting point for the replication machinery. The ORI is where the replication enzymes bind, helicases, premises, and polymerases that unwind initiate, and elongate the replication process.
In prokaryotes, the ORI is often a specific sequence known as the replication origin sequence (oriC), which is conserved among different bacterial species. In eukaryotic cells, replication origins are dispersed throughout the chromosomes, and the exact location and mechanism of initiation are still not completely understood.
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I jus need help w my science stuff☠️
Answer:
Explanation:
Sound energy: Crowd cheering
Chemical energy: Body converts nutrients into energy to run
Mechanical energy: The camera filming the photo
(1) Draw all significant resonance structures of cycloserine. In step 1 draw the resonance form that forms a carbocation next to the oxygen. Include lone pairs and charges in your structure.
(2) In step 2 draw the resulting resonance structure. Include lone pairs and charges in your structure.
Resonance structures of cycloserine can be produced with the help of rotating arrows, produced with a carbocation in step 1 and the resultant resonance structure in step 2 after the double faced arrow.
An antibiotic called cycloserine was discovered in the bacterium Streptomyces orchidaceous. When treating tuberculosis, it is used with other medications. To depict the motion of the electrons in the "original" resonance structure, use curved arrows. By following the arrows, the "new" resonance structure should be a "product" that is automatically created. It will have two resonance structures as depicted in the image attached. Carbocation produced is the step 1 and the resultant compound is the step 2 in the image.
Resonance structures are collections of Lewis structures that explain how the electrons in a polyatomic ion or molecule become delocalized. Because molecules and polyatomic ions frequently have partial charges and fractional bonds, a single Lewis structure frequently falls short of explaining the bonding in a molecule or polyatomic ion.
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14. A solution of C₂H4O dissolved in water has a boiling point of 101.6 °C. What is the
molality of the solution? (Kb of water is 0-.512 degrees c/m)
The molality of the solution is 3.125 m.
What is the molality of the solution?Let us recall that the boiling point of the solution is one of the colligative properties and the implication of this is that it depends on the amount of the substance that we can find in the solution.
Note that;
ΔT = K m i
ΔT = Boiling point elevation
K = boiling constant
m = molality
i = Vant Hoff factor
Then;
ΔT = 101.6 - 100.0
= 1.6°C
Thus;
1.6 = 0.512 * m * 1
m = 1.6/0.512
m = 3.125 m
Thus the molality is 3.125 m
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The atomic mass unit is equivalent to 112 of the mass of a neutral atom of which element?
Answer: carbon element
Explanation:
this is it