According to the molecular geometry, XeF₂Br₂ is polar as the compound possesses dipole moment.
What is molecular geometry?Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.
It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.
They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.
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At a pH of 7.40, what is the ratio of the molar concentrations of H2PO4- to H3PO4? What is the ratio of CO3 2- to HCO3-?
The ratio of the molar concentrations of H2PO₄⁻ to H3PO₄ is 0.09
The ratio of the molar concentrations of at a pH of 7.40, CO₃²⁻ to HCO₃⁻ is 1:1.
Molar concentration – what is it?The number of moles of a solute per liter of solution is referred to as molar concentration or molarity.
When the reaction's balanced equation is
H₂CO₃(aq) → HCO₃ -(aq) + (H⁺)
Ka = 4.3 x10⁻⁷ and PH = 7.4
To get PKa = -㏒ Ka
PKa = -㏒(4.3x10⁻⁷) = 6.37 by changing the Pka value in the formula below:
PH = Pka + ㏒[salt/acid]
PH= PKa + ㏒[HCO3-]/[H2CO3]
㏒[HCO⁻₃]/[H₂CO₃] = PH-Pka
[HCO₃⁻] /[H₂CO₃] = 10^(7.4 - 6.37)
∴[HCO₃⁻]/[H₂CO₃] = 11.7
∴[H₂CO₃]/[HCO₃⁻] = 1/11.7 = 0.09
This is due to the fact that the two ions are in equilibrium at a pH of 7.40, which means that for every HCO₃ molecule produced, there is also one molecule of CO₃²⁻ produced. This is as a result of the following response:
CO₂(carbon dioxide) + H₂O ⇌ H₂CO₃ ⇌ HCO₃⁻ + H⁺ ⇌ CO₃²⁻ + 2H⁺
The reaction is in equilibrium at a pH of 7.40. In light of this, the molar ratio of CO₃²⁻ to HCO₃ is 1:1.
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Calculate the solubility of lead(II) iodide, PbI2, in 0.025 M KI. Ksp(PbI2) = 7.9×10^-9
A. 4.5 × 10-2 M
B. 2.8 × 10-2 M
C. 8.9 × 10-5 M
D. 5.0 × 10-5 M
E. 1.3 × 10-5 M
The solubility of PbI2 in 0.025 M KI is 4.5 × 10^-2 M, which is answer choice A.
What is solubility?A substance's solubility in chemistry refers to its capacity to combine well with another substance—the solvent—to form a solution. The ability of the solute to produce such a solution is required for solubility, which is the opposite attribute.
The concentration of the solute in a saturated solution, a solution in which no more solute can be dissolved, is the standard measurement of the solubility of a material in a particular solvent.
To calculate the solubility of PbI2 in 0.025 M KI, we can use the expression for Ksp, which is the equilibrium constant for a solid substance dissolving in a solution. The expression for Ksp is [Pb2+][I-]^2 = Ksp. Since we know the Ksp value for PbI2 and the concentration of I- ions in the solution, we can use this expression to calculate the solubility of PbI2.
Given that Ksp(PbI2) = 7.9 × 10^-9 and [I-] = 0.025 M, we can substitute these values into the Ksp expression:
[Pb2+][I-]^2 = 7.9 × 10^-9
Solving for [Pb2+], we get:
[Pb2+] = sqrt(7.9 x 10^-9 / 0.025) = 4.5 × 10^-2 M
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Which of the following pollutant gases is not produced directly in a combustion engine?
a. CO
b. CO2
c. O3
d. NO
e. NO2
The following polluting gases do not directly create O3 in a combustion engine.
What three gases are present in your home?Therefore, either propane, butane, or a combination of the two is the type of gas used in dwellings. Natural gas (also known as mains gas) and compressed natural gas (CNG), both of which include methane, are the two types of gas used in homes. Hydrocarbon gases include propane, butane, and natural gas.
Which common gases are there?Common gases include oxygen, nitrogen, sulphur dioxide, argon, and a few more substances. See how these chemicals are used in daily life and how they assist us in the paragraphs below.
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What is the pH of a 7.5 × 10^-3 M Ba(OH)2 solution at 25°C?
0.015
1.82
12.18
11.88
The pH of a 7.5 × 10^-3 M Ba(OH)2 solution at 25°C : c)12.18 . Hence c) is the correct option.
What do you understand by pH?In chemistry, pH is a scale used to specify the acidity or basicity of an aqueous solution. pH is measured on scale of 0 to 14. pH value of 7 is neutral, which implies it is neither acidic nor basic. pH value of less than 7 means it is more acidic and pH value of more than 7 means it is more basic.
Ba(OH)2 -> Ba 2+ + 2OH-
7.5 × 10^-3 x 2 = 0.015 mol/L OH-
pOH = -log ( 0.015) = 1.823
pOH + pH = 14
pH = 14 - 1.823 = 12.18
pH is 12.18.
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Which of the following functional groups of an amino acid would be in the ionized state at high pH? O -CH3 O O II -CNH2 O -CH2-OH O O -С-ОН O -CH2
Three amino acids have basic side chains when the pH is neutral. These are histidine, lysine, and arginine (Arg). The ability of a molecule to function as an acid or base is influenced by functional groups that donate or take protons.
Only glutamine is a zwitterionic amino acid at pH 7. An amino acid's structure enables it to function as both an acid and a base at a certain pH level. At a certain pH level that differs from one amino acid to the next, almost all amino acids exist as zwitterions. Because the p- electron of the oxygen atom moving causes resonance in the carboxylate ion, carboxylic acids are easily ionized.
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correct option is (-COOH), A higher pH would cause the (-COOH) functional groups of an amino acid to be ionised. Proteins are made up of substances called amino acids.
Anion acid has two functional groups: an amino group (-NH2) and a carboxylic acid group (-cooH). They manifest as zwitter ions when the pH is neutral. The amino acid is protonated at low pH, which means it gains a proton or H+ at the NH 2 group. The solution is acidic at low pH levels and basic at high pH levels. The amino acid is deprotonated at high pH levels, which means it removes one proton or H+ from the carboxyl group. As a result, the carboxyl group is ionised at high pH while the amine group is ionised at low pH.
hence the appropriate choice is (-COOH).
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How many moles of HCl are in 125 mL of a 0.612 M solution of HCl? What is the mass of HCl?
mass HCl
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 2.78g is the mass of HCl.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
Molarity= number of moles of solute/volume of solution in litre
Where,
moles= given weight /by molecular weight
= w/ 36.46
Substituting values in equation 1
0.612=(w/36.46)/( 125/1000)
w=0.80g
Therefore, 2.78g is the mass of HCl.
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HELP PLEASEEE I need help balancing chemical equations. If anyone can please show me how to solve
them. ?
Answer:
2H2O = 2H2 + O22. 2F2O3 = 4Fe + 3O2
3. 2Na + Cl2 = 2NaCl
4. 2HgO = 2Hg + O2
5. TiCl4 + O2 = TiO2 + 2Cl2
6. 4Al + 3O2 = 2Al2O3
7. 2HCl + Zn = H2 + ZnCl2
8. 2Al + 3CuCl2 = 2AlCl3 + 3Cu.
When ADP accumulates, what is the effect on the rate of metabolic chemical reactions?
Speeds them up
Slows them down
Has no effect
The accumulation of ADP (adenosine diphosphate) affects the rate of metabolic chemical reactions by slowing them down.
What is chemical reaction?
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. It involves the breaking and forming of chemical bonds, resulting in the formation of new substances with different properties. Chemical reactions are essential for many processes in nature, including respiration, digestion, and photosynthesis.
ADP is a by-product of the energy-producing reactions that take place in cells. This by-product can build up and inhibit the activity of enzymes involved in these metabolic reactions. Therefore, an accumulation of ADP can slow down the rate of metabolic chemical reactions.
However, the rate of metabolic chemical reactions can also be sped up by the presence of ADP. This occurs when the cellular metabolic processes become inhibited by the presence of ADP and require a boost to be activated again. In this case, the presence of ADP can activate enzymes and thus speed up the rate of metabolic chemical reactions.
In sum, the accumulation of ADP can either slow down or speed up the rate of metabolic chemical reactions, depending on the current state of the metabolic process.
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Which of the following is an intermediate in the bromination of ketones under acidic conditions? O a carbanion O an enolate O an enol O an beta-hydroxyketone
An enolate is an intermediate in the bromination of ketones under acidic conditions
An enolate is a type of carbanion intermediate that is formed by the deprotonation of a carbonyl group in an aldehyde or a ketone. It has a negatively charged carbon atom that is adjacent to a double-bonded oxygen atom (C=O) in the carbonyl group. Enolate intermediate can be formed by the addition of a strong base to a carbonyl compound, such as lithium diisopropylamide (LDA) or sodium hydride (NaH). Once formed, enolates can participate in a variety of chemical reactions, such as nucleophilic addition and substitution, condensation, and elimination reactions.
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he mineral rhodochrosite [manganese(II) carbonate, MnCO3] is a commercially important source of manganese. Write a half-reaction for the oxidation of the manganese in MnCO3 to MnO2 in neutral groundwater where the principal carbonate species is HCO3–. Add H2O, H+, and electrons as needed to balance the half-reaction.
include states of matter
Half-reaction for the oxidation of the manganese in MnCO3 to MnO2 in neutral groundwater is : MnCO₃ + 2H₂O → MnO₂ + HCO₃⁻ + 2e- + 3H+
What is half reaction?A half-reaction is the part of overall reaction that represents, either oxidation or a reduction.
MnCO₃ → MnO₂ + HCO₃⁻
This equation is not balanced.
Oxidation number of Mn changes from +2 in MnCO₃ to +4 in MnO₂ , thus two electrons must be added to the right.
Then the equation becomes; MnCO₃ → MnO₂ + HCO₃⁻ + 2e-
In terms of electrons, now the reaction is balanced. But, in terms of charges it is not.
In reactant side, total charge = 0 and in the product side, total charge = -1 + (-2) = -3
To balance the excess negative charge, add add 3 H+ on the product side; MnCO₃ → MnO₂ + HCO₃⁻ + 2e- + 3H+
In terms of charges, now the reaction is balanced but in terms of atoms it is not.
There is excesses of Hydrogen and Oxygen atoms. So, to balance this, add H20 to the reactant side to balance H and O atoms
This gives; MnCO₃ + 2H₂O → MnO₂ + HCO₃⁻ + 2e- + 3H+
Now, the equation is balanced.
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Step 5: Measuring the Volume of Air Near 20°C (Room
Temperature)
Temperature of gas:
°C
Use tongs to put the beaker (with tube and
thermometer) on the hot plate.
600 ml
Height of the column of gas:
600
500
400
00
200
100
cm DONE✓✔
Answer:c= 21 k=294 height= 6.2 volume= 0.78
How many grams of H2 are needed to react with 3.15 g of N2
In order to react with 3.15 g of N2, we would need 6.3 grams of H2. This is because the balanced chemical equation for the reaction of nitrogen (N2) and hydrogen (H2) to form ammonia (NH3) is:
N2 + 3H2 → 2NH3
So for every 1 mole of N2, we need 3 moles of H2. Since the molar mass of N2 is 28.02 g/mol and that of H2 is 2.02 g/mol, we can use the following conversion to find the number of grams of H2 needed:
3.15 g N2 x (3 moles H2/1 mole N2) x (2.02 g H2/1 mole H2) = 6.3 g H2
Topic: Washing Machine Durability We wanted to test which brand of washing machine (Warp-pool, Sam's Sung, or GEE) was the most durable. Experiment(al) Design: For our experiment we bought three brand new Washing Machines. A Warp-pool, Sam's Sung, and a GEE. We loaded each washing machine with 50 clay bricks. We ran all of the washing machines at the same time, non-stop, and recorded how long it took each one to break down. We recorded that data in the Table 1. Data: Brand of Washing Machine Length of time till it stopped working Warp-pool 10 Days, 5 Hours and 3 minutes Sam's Sung 2 months, 13 hours and 52 minutes GEE 1 month, 2 hours, and 32 minutes. Question at position 3 3 10 points Question at position 3 Describe your reasoning for writing the claim that you did. Response Expectations: Write in complete sentences. Your response should be a few sentences in length. I should be able to understand your reasoning clearly.
The claim that "GEE washing machine is more durable than Warp-pool and Sam's Sung washing machines" is based on the experimental data gathered from the test. The data shows that the GEE washing machine was able to run for a longer period of time before breaking down, compared to the Warp-pool and Sam's Sung washing machines. With only 1 month, 2 hours, and 32 minutes of running time, GEE washing machine outlived the other two brands, which were able to run for 10 days, 5 hours, and 3 minutes and 2 months, 13 hours, and 52 minutes respectively. This indicates that the GEE washing machine is more durable and can withstand more wear and tear compared to the other two brands.
Boyle's Law states that when a sample of gas is compressed at a constant temperature the product of the pressure and the volume remains constant PV = C.
a. Find the rate of change of volume with respect to pressure.
b. A sample of gas is in a contain at low pressure and is steady compressed at constant temperature for 11 minutes is the volume decreasing more rapidly at the beginning or the end of the 11 minutes? Explain.
From the formula dV/dP we see that as P increases the absolute value of dV/dP (increase, remains constant, decreases) thus the volume is more rapidly (increasing, decreasing, remains constant) at the beginning.
c. Write the formula for isothermal compressibility in terms of P.
a) The rate of change of volume with respect to pressure is -C/P².
b) The P is in the denominator and when the denominator will increase, the value of the function will decrease.
c) The formula for isothermal compressibility in terms of P is 18/P.
Boyle's law: what is it?When a gas is maintained at a constant temperature, it behaves according to Boyle's Law, a fundamental chemistry principle. According to the law, a gas's volume is inversely related to the pressure it exerts at a given temperature.
a. According to the Boyle's law, we have
PV = C
V = C/P = CP⁻¹
So using the chain rule, the rate of change of volume with respect to pressure is
dV/dP = C×(-1P⁻¹⁻¹)
dV/dP = C×(-1P⁻²)
dV/dP = -C/P²
(b) From the formula for dV/dP, we see that as P increases,
the absolute value of dV/dP decreases
Given that P is in the denominator, the value of the function will decrease as the denominator increases. Consequently, the volume starts off rising more quickly.
thus the volume is increasing more rapidly at the begininh.
(c) The formula for the isothermal compressibility is given by
β = -1/V dV/dP
β = -1/V (-C/P²)
β = C/VP²
β = C/PV.P
β = C/C.P
β = 18/P.
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1. Ionic compounds and polar molecules can both dissolve in water. Which statement correctly describes what will occur when they dissolve?
ONeither the ionic compound nor the polar molecule will dissociate in water.
O Both the ionic compound and the polar molecule will dissociate in water.
The ionic compound will dissociate, but the polar molecule will not.
The polar molecule will dissociate, but the ionic compound will not.
Answer: C. Both will dissociate.
Explanation: Polar molecules dissociate in water because they can hydrogen bond. This allows them to hydrogen bond with other water molecules which are also Polar. In general, Polar molecules dissolve in other polar solutions.
Ionic compounds dissolve in water because they can form Ion-Dipole interactions. The cation of the Ionic compound attracts the negative part of the water molecule while the anion attracts the positive part of the water molecule.
Calculate the pH of each of the following solutions of a strong acid in water.
(a) 0.16 M HCl
_____________
(b) 4.4 M HClO4
__________
(c) 2.3???10?11 M HI
_______________
Strong acids almost entirely transfer their protons to the solvent molecules, including HCl, HClO4, and HI.
How does pH function?a way to measure how basic or acidic a substance or solution is. The pH scale has numbers 0 through 14. On this scale, a pH value of 7 is regarded as neutral, indicating it is neither acidic nor basic.
What is the pH equation used for?The hydronium ion concentration in moles per liter must be known in order to estimate the pH of an aqueous solution (molarity). Using the formula pH = - log [H3O+], the pH is then determined. Take a 0.0025 M HCl solution as an example, and calculate its pH. Since it is potent and completely ionized in water, HCl qualifies as an acid.
(a) 0.16 M HCl
pH = -log[H+] = -log[0.16] = 0.79
pH = 0.79
(b) 4.4 M HClO4
pH = -log[H+] = -log[4.4] = -0.64
pH = -0.64 (negative sign)
(c) 2.3???10?11 M HI
Here we have typo error 2.3???10?11 M HI instaed of 2.3 x 10-11 M
[H3O+]total = [HA]acid + [H3O+]water
[H3O+]total = [HA]acid + [OH-]water (since, [H3O+]water = [OH-]water)
[H3O+]total = [HA]acid + [OH-]water = (2.3e-11) + (9.99e-8) = 9.9923e-8
pH = -log[[H3O+]total] = -log[9.9923e-8] = 7.00
pH = 7.00
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HELPPP
Engineering includes the study of:
science, math, universe, and history
science, universe, space, and logic
science, math, logic, and economics
science, math, history, and space
Engineering includes the study of science, universe, space, and logic and is therefore denoted as option B.
What is Engineering?This is referred to as the branch of science and technology concerned with the design, building, and use of engines, machines, and structures which helps to make work easier and faster.
It is also studied in schools and has various divisions such as mechanical, chemical engineering etc and it involves the study of science, universe, space, and logic which are encountered when dealing with this broad subject and is therefore the reason why option B was chosen as the most correct choice.
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Which of the following sets of elements have the [noble gas]ns2np2 valence electron configuration?
A. C, Si, Ge, Sn, Pb
B. F, Cl, Br, I, At
C. N, P, As, Sb, Bi
D. O, S, Se, Te, Po
E. Ti, Zr, Hf
Electronically, group 14 elements have the [noble gas]ns2 np2 general valence shell configuration. As a result, Option (a) is accurate. Sn, Pb, Ge, Si, and C
How is the right electron configuration written?The shell number (n) is the first symbol used to represent an electron configuration, followed by the kind of orbital and the superscript number of electrons in the orbital. Consider this: The periodic table reveals that oxygen contains eight electrons.
What are the four basic guidelines for expressing electron configurations?Orbital occupancy, the Pauli exclusion principle, Hund's rule, and the Aufbau process are known to be the primary "tools" we have for expressing electron configurations. Orbitals are occupied in a particular sequence,
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why are the spontaneous processes shown sometimes said to be "downhill" in free energy?
Spontaneous processes are often said to be "downhill" in free energy because they release energy in the form of heat and/or work.
The energy released during a spontaneous process is represented by a decrease in the free energy (ΔG) of the system. Free energy is a thermodynamic function that takes into account both the internal energy (U) and the entropy (S) of a system. A spontaneous process occurs when the free energy of the system decreases, which means that the internal energy of the system decreases and/or the entropy of the system increases. The free energy of a system is also related to the potential energy of the system. The potential energy of a system is the energy it possesses as a result of its position or configuration. When a system undergoes a spontaneous process, the potential energy of the system decreases, just like the free energy. Imagine a ball placed on a hilltop, the ball has potential energy because of its position, and that potential energy can be converted into kinetic energy when the ball is allowed to roll down the hill. Similarly, the potential energy of a system can be converted into heat or work during a spontaneous process. Therefore, spontaneous processes are often described as "downhill" in free energy because they involve a decrease in the potential energy of the system, similar to a ball rolling downhill. The decrease in potential energy of the system is accompanied by the release of energy in the form of heat and/or work, which makes the process spontaneous.
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Two gases that do not react with each other are placed in the same container. Will they mix completely with each other?
Two gases that do not react with each other are placed in the same container, they will mix completely with each other. This can be solved using the concept of gaseous mixture.
What happens when two gases are mixed in the same container?The ability of gases to mix with one another is one of their characteristics. As a result, they combine to form a solution, or a homogenous combination. If we know the makeup of the gases in the mixture, it is simple to determine some of the characteristics of the combination. Each element in the gas phase of a combination of gases can be handled independently.
When a mixture of gases is kept in the same container, each gas has that container's volume.
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The oxidation of 3 mol of glucose by the pentose phosphate pathway may result in the production of:
A) 2 mol of pentose, 4 mol of NADPH, and 8 mol of CO2.
B) 3 mol of pentose, 4 mol of NADPH, and 3 mol of CO2.
C) 3 mol of pentose, 6 mol of NADPH, and 3 mol of CO2.
D) 4 mol of pentose, 3 mol of NADPH, and 3 mol of CO2.
E) 4 mol of pentose, 6 mol of NADPH, and 6 mol of CO2.
C) The oxidation of 3 mol of glucose by the pentose phosphate pathway may result within the generation of 3 mol of pentose, 6 mol of NADPH, and 3 mol of CO2.
How numerous NADPH are created in pentose phosphate pathway?2 NADPH Four modes of the pentose phosphate pathway, each adapted to the era of a item required by a specific cell. In mode 1, 1 atom of glucose-6-phosphate (G6P) makes 5 particles of ribose-5-phosphate (5R5P). In mode 2, 1 particle of G6P makes 1 atom of R5P and 2 NADPH.
How numerous atoms of glucose-6-phosphate are recovered in pentose phosphate pathway?In add up to, a arrangement of PPP responses cycle 6 particles of glucose-6-phosphate to 5 particles of glucose-6-phosphate, 12 NADPH and 6 CO2 [18]. Figure 4.4 appears a conspire of all responses inside the PPP. NADPH is primarily utilized for greasy corrosive amalgamation, pyruvate oxidation to malate, and the decrease of glutathione.
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Which of the following reagents is the best choice for oxidizing a primary alcohol to an aldehyde? O H2Cr04
O LiAlH4 pyridinium chlorochromate in CH2Cl2
O. KMnO4 O. Na2Cr207, H2SO4
Pyridinium chlorochromate is the best choice for oxidizing a primary alcohol to an aldehyde.
What is oxidization?The chemical process of oxidation. When atoms or groups of atoms lose electrons, a process known as electron capture takes place. When a chemical species obtains oxygen or loses hydrogen, this is another way to define oxidation. Oxidation occurs as a result of these occurrences. a chemical process that occurs when an object comes into touch with oxygen or another oxidizer. Rust and an apple's brown colour are examples of oxidation. A chemical reaction in which electrons are lost is referred to as oxidation. The breakdown of fatty acids in mitochondria and/or peroxisomes occurs during a process known as beta oxidation.
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Please Help ASAP - 100 pts + Brainliest if correct!!
Answer:
see below
Explanation:
wavelength of UV light= 2.94 * 10-⁸m .
we need to find out its frequency,
As we know that,
[tex]v = f \lambda [/tex]
v = speed = 3 * 10⁸ m/sf = frequency [tex]\lambda [/tex] = wavelengthhence,
3 * 10⁸ m/s = f * 2.94 * 10-⁸m
f = 3/2.94 *10⁸*10⁸
f = 1.02 * 10¹⁶s-¹
and we are done!
Answer:
i agwee!
Explanation:
Yash they are right
What is the hybridization of the bold atom in CH3CO2−?
What is the hybridization of the underlined atom in ?
sp
sp2
sp3
sp3d
sp3d2
The bold atom in CH3CO2? has an sp3 hybridization. The bold atom in PH4+ is hybridized as sp2. In AlF3, sp3 is the hybridization of the atom in bold.
Describe an atom.An atom is a particular kind of material particle that makes up a chemical element. The core nucleus of an atom is surrounded by either a positively charged electron or a large number of negatively charged electrons. There could be neutrons, two rather large particles that make up the positively charged nucleus.
What led to Atom's shutdown?Even while the objective of growing the software maker community still exists, we have decided to forgo Atom in order to strengthen our commitment to providing efficient and dependable application development to the cloud utilizing Microsoft's Visual Code and GitHub Codespaces.
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Draw the structure of a compound with the formula C8H18 that has two chirality centers, both R. Use the wedge/hash bond tools to indicate stereochemistry.
Octane is an alkane with the chemical formula C8H18 and the condensed structural structure CH3(CH2)6CH3.
What exactly is an element?An element is a fundamental thing that is challenging to break down into smaller components. In chemistry and physics, an element is a substance that cannot be broken by non-nuclear processes. In mathematics and computers, an element is a special part of a larger system or set. In chemistry, a simple material is referred to as one that cannot be broken down into smaller components or changed into another chemical. An element is made up of atoms, which are composed of protons, neutrons, and electrons. Each of an element's atoms contains a set number of protons.
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Bromination of an alkene by N-bromosuccinimide (NBS) in the presence of light or peroxide is a radical reaction and produces an allylic bromide. For the following bromination of 3-methylcyclopentene, select the allylic bromides from the set at the right that would be products of the reaction.
Which structures are products of this reaction? (Select all that apply.)
O A
O B
O C
O D
O E
O F
O G
The structures A, B, C and D are allylic bromides that are products of the reaction. Hence, Option A, B, C, D is the correct answer. And Option E, F, G are not allylic bromides, they are not formed as products of the reaction.
The bromination of an alkene with N-bromosuccinimide (NBS) in the presence of light or peroxide is a radical reaction that occurs at the allylic position of the alkene. The allylic radical intermediate is formed by cleavage of the N-Br bond in NBS and attack of the radical on the alkene. This reaction generates an allylic bromides as the final product.
The structure of 3-methylcyclopentene is:
H3C CH2
\ |
CH CH2
/ |
H3C CH2
The structures A, B, C and D are allylic bromides that are products of the reaction.
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How much heat is transferred per mole of NH3(g) formed in the reaction shown below?
N2(g) + 3 H2(g) ? 2 NH3(g) ?H = – 92.2 kJ
heat transferred per mole of NH3(g) formed in the reaction shown below N2(g) + 3 H2(g) ? 2 NH3(g) ?H = – 92.2 kJ is -46.1 kJ/mole.
The heat transferred per mole of NH3(g) formed in the reaction can be calculated using the enthalpy change (ΔH) of the reaction, which is given as -92.2 kJ. The reaction is:
N2(g) + 3 H2(g) → 2 NH3(g). The coefficient of NH3(g) in the balanced equation is 2. Therefore, 2 moles of NH3(g) are formed for every mole of N2(g) and 3 moles of H2(g) that react. So, the heat transferred per mole of NH3(g) formed is -92.2 kJ/2 moles = -46.1 kJ/mole.
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Consider these chemical equations.
N2(g) + 3H2(g) → 2NH3(g)
C(s) + 2H2(g) → CH4(g)
4H2(g) + 2C(s) + N2(g) → 2HCN(g) + 3H2(g)
Which equation(s) do you need to reverse in order to calculate the overall equation for the formation of HCN and H2 from NH3 and CH4? Check all that apply.
N2(g) + 3H2(g) Right arrow. 2NH3(g)
C(s) + 2H2(g) Right arrow. CH4(g)
4H2(g) + 2C(s) + N2(g) Right arrow. 2HCN(g) + 3H2
Equations A and B would need to be reversed.
Which equations are reversed?
We know that sometimes, we can only be able to obtain the correct equations when we can be able to sift through the equations that have been given as we have in this case.
Let it be known that the equation of the reactions do occur in steps and the end product would be the formation of the HCN. We have to reverse some of the reactions in order to obtain the equation that is desired in the question above as by the use of the adding of equations.
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Indicate the hybridization about each interior atom in CH_3NH_2 (skeletal structure H_3CNH_2). a. C(sp^2):N(sp^3) b. C (sp^2): N (sp^2) c. C (sp^3): N (sp^2)
d. C (sp^3): N (sp^3)
Carbon and Nitrogen are present as the central atoms in CH3NH2. Carbon forms sigma bonds with Nitrogen and three surrounding Hydrogen atoms.
Indicate the hybridization about each interior atom?The carbon atom acquires an sp3 hybridization state as a result. With the nearby atoms, nitrogen forms three sigma bonds. Methanamine is the substance mentioned. The inner atoms of the given molecule are carbon and nitrogen. To determine whether carbon and nitrogen are hybridised, we must first write down their electrical configurations.
The electrical configuration of carbon is and its atomic number is six. of one s orbital and three p orbitals. All four of the hybrid orbitals are used for bonding.
Carbon has undergone sp3 hybridization as a result. Nitrogen has an atomic number of seven and an electronic configuration of 1s22s22p3. One s orbital and three p orbitals combine to generate four through hybridization.
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Bohr used the emission spectrum of hydrogen to support his idea that:
a. electrons travel around the nucleus in a circular orbit
b. there are limited number of energy levels an electron may occupy
c. the energy of an electron is related to its distance from the nucleus
d. electrons move in discrete energy levels around the nucleus
Based on the hydrogen atom's spectrum, he postulated that the lines were caused by light being emitted or absorbed as an electron changed orbits within the atom (option b).
Where can one locate hydrogen?The majority of stars and the sun contain hydrogen, and Jupiter is primarily made of this element. Water is the form of hydrogen that is present on Earth in the highest amounts. Only very small amounts of it—less than 1 part per million by volume—are present in the atmosphere as a gas.
What is the function of hydrogen?To produce energy, power, and heat, hydrogen can be used in fuel cells. Nowadays, transportation and fertilizer manufacturing are the two uses of hydrogen that are most prevalent.
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