Since 2 2.60 PPM singlet was seen for the /C-CH, Proton, and IHNMR data clearly showed the presence of acetophenone. IHNMR chemical with a multiplicity of 2.60 PPM is singlet, and there are 3 photons in total.
IHNMR chemical with a multiplicity of multiple number of photons of 7.49 to 7.45 PPM and a Proton number of 1. acetophenone number of photons in an IHNMR chemical with a multiplicity of 7.60 - 7.55PPM is multilaterally 2. IHNMR Chemical of multiplicity 7:98 - 7.94 PPM is multiplet no. of Proton is 2. So, Acetophenone chemical will be administered. Only one at proton comparatively shielded opposition and miter will give multiple in the benzene ring according to the IHNMR value of one singlet observed at 2–6 1 PPM. OxfordCryosystems.
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Which model is useful in showing the reactivity of potassium?
Neither model is able to show the reactivity of potassium.
Model 1 because it shows an electron in the 4s orbital.
Model 2 because it shows an electron in the outermost ring.
Both models because each shows an electron in the outermost shell.
Both models are useful to describe the reactvity of potassium because each shows an electron in the outermost shell.
What are the valence electrons?Valence electrons can be described as the s and p electrons in the outermost shell while the electrons present in the inner shell are called core electrons.
Valence electrons can be all arranged in different shells and are negatively charged particles. These electrons are responsible for chemical interaction between atoms and the formation of chemical bonds.
Only the electrons present in the outermost shell can contribute in the formation of a chemical bond and decide the reactvity of atom such type of electrons is called valence electrons.
The reactivity in potassium can be seen due to one electron present in the valence shell.
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Which type of neuron begins in most body organs and carries information toward the central nervous system?.
Answer:
Afferent or sensory neurons
Explanation:
They collect stimuli received by receptors throughout the body, including the skin, eyes, ears, nose, and tongue as well as pain and other receptors in the internal organs. Sensory information is transmitted to the central nervous system, which includes the brain and spinal cord.
4) Complete the notation configuration for Neon.
Answer:
Explanation:
[He]2s²2p⁶
a gas mixture of xe, ne, and ar has a total pressure of 12.20 atm. what is the mole fraction of xe if the partial pressures of ne and ar are 2.10 and 4.50 atm, respectively?
6.6 is the mole fraction of xe if the partial pressures of ne and ar are 2.10 and 4.50 atm, respectively.
Why is partial pressure called?The idea of partial pressure is driven by the fact that each individual gas contributes to the overall pressure in a given proportion, which corresponds to its partial pressure. In order to characterize all the pieces, it is essentially equivalent to taking a % or proportion of the whole.
Briefing:The total pressure is equal to the sum of the individual pressures, according to Dalton's law.
Ptotal = total pressure of gases = 12.20 atm
Pne = partial pressure of ne = 2.10 atm
Par = partial pressure of ar = 4.50 atm
Pxe = partial pressure of xe = ?
putting in the values we get:
12.20 = 2.10 + 4.50 + Pxe
Pxe = 5.6
We employ Dalton's law to determine the solution's vapor pressure, which is:
Ptotal = (Pxe + Xxe)
We are given:
Pxe = partial pressure of xenon = 5.6
Xxe = mole fraction of xenon = ?
Using the values in the aforementioned equation, we get:
12.20 = (5.60 * Xxe)
Xxe = 6.6
The mole fraction of Xe is 6.6 as a result.
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when 100 cm3 of 1.0 moldm-3 hcl is mixed with 100 cm3 of 1.0 moldm-3 naoh, the temperature of the resulting solution increases by 5.0 c what will be the temperature change
Temperature remains the same as the amount of heat and the concentration remains the same..
When 100cm3 of 1.0 mol dm-3 hcl is mixed with 100 cm3 of 1.0 mol dm-3 of NaOH the temperature remains the same. Here, the volume of the solution gets half .mass and heat released reduced by half.so, temperature remains the same as the concentration of the solution does not change.concentration of the solution is the amount of solute present in the given solution.
So, the temperature remains the same as 5C.We know this from calculating heat exchange using specific heat capacities.This process explains when two or more substances at different temperature are brought together to the environment they eventually reach the same temperature.
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5. What are the coefficients when the equation below is balanced?
_H₂+_0₂→--H₂O
O 1,1,2
O 4,3,1
O 2,1,2
0 2,2,1
Answer:
C.) 2,1,2
Explanation:
You have to balance the equation by getting the number of elements on the left and right side to equal. Before balancing there is one more oxygen on the left side than the right side. You have to change the coefficient in front of H2O to fix this, and that means adding a "2" in front of the H2 to get that to equal as well.
You end up with 2H₂+10₂→ 2H₂O
stion 1 of 10
What does a pH of 7 say about a solution?
O A. The solution is neutral.
B. The solution is at equilibrium.
OC. The solution is acidic.
O D. The solution is basic.
The correct answer is A. A pH of 7 say about a solution is The solution is neutral.
What is a pH of 7A pH of 7 indicates a neutral solution. The pH scale is a logarithmic scale that measures the acidity or alkalinity (basicity) of a solution. A pH value of 7 is considered neutral, which means the concentration of hydrogen ions (H+) is equal to the concentration of hydroxide ions (OH-) in the solution. In other words, the solution is neither acidic nor basic.
Acidic solutions have a higher concentration of hydrogen ions (H+), which makes them more acidic. The lower the pH value, the higher the concentration of H+ ions and the stronger the acid.
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Calculate the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of caf2 in 850.0 g of water.
the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of caf2 in 850.0 g of water. is 0.00840 moles
The calculation of the mole fraction is as follow:
As we know that
Molar mass = Number of grams ÷ number of moles
Or
number of moles = Number of grams ÷ molar mass
from the question
Number of moles of CaI2 = 0.400
And, Molar mass of water = 18.0 g/mol
Now we can calculate the moles of water is
= 850.0 g ÷ 18.0 g/mol
= 47.22 mol
And, Total number of moles is
= 0.400 + 47.22
= 47.62
So, Mole fraction of CaI2 is
= 0.400 ÷ 47.62
= 0.00840 mole
hence, the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of caf2 in 850.0 g of water. is 0.00840 moles
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how many grams of silver chromate will precipitate when 150 ml of .500 m silver nitrate is added to 100 ml of .400 potassium chromate
There is 12.4g of silver chromate.
Almost all alkali metal compounds and nitrates are soluble, but most silver compounds are not. Therefore, when the soluble salts silver nitrate and sodium chromate are mixed, insoluble silver chromate is formed and precipitated. This method involves titrating the chloride ion concentration in a solution with silver nitrate. A silver chloride precipitate forms when the silver nitrate solution is slowly added.
The endpoint of the titration is when all chloride ions have precipitated. Silver chromate precipitates as a brick-red precipitate from aqueous solutions. This reaction is also called a precipitation reaction. A precipitate is an insoluble solid that forms when solutions are mixed. For precipitation titrations with silver nitrate, a suitable indicator indicates the end point of the titration by a color change when there is excess Ag+ in the solution.
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which is the best reason that the atomic radius generally increases with atomic number in each group of elements?
The atomic radius becomes larger as move down the group or column in the periodic table because it increases the number of energy levels with each successive period.
As we move down the group, the number of period increases, which means the number of shells in an atom also increases. So, the extra electrons are added in the next shell with each successive period down the group, and the atomic size increases with an increase in atomic number down the group.
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calculate the theoretical yield of all products when 18.9 grams of lithium phosphate reacts with excess gold (i) acetate
The yield of products formed is:
gold phosphate equals 111.93 grams and the yield of lithium acetate 32.30 grams.
This theoretical yield can be calculated as:
Molar masses of reactants and products that they need. lithium phosphate equals 115.79 grams per mole. Mass of gold phosphate equals 685.87 grams per mole and the molar mass of lithium acetate equals 65.98 grams per mole. Using number of moles and mass of substance produced we can calculate the products formed.
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what is the empirical formula of a compound that contains 60% titanium and 40% oxygen by mass?
The empirical formula of a compound that contains 60% titanium and 40% oxygen by mass is TiO₂.
How to calculate empirical formula?Empirical formula is a notation indicating the ratios of the various elements present in a compound, without regard to the actual numbers.
The empirical formula of a substance can be calculated as follows:
Ti = 60g ÷ 47.87g/mol = 1.25molO = 40g ÷ 16g/mol = 2.5molNext, we divide each mole value by the smallest as follows:
Ti = 1.25mol ÷ 1.25 = 1O = 2.5mol ÷ 1.25 = 2The empirical ratio of Titanium and oxygen is 1:2, hence, the empirical formula is TiO₂.
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. at the beginning of his experiment, josh has 10 g of element a and 10 g or element b. when finished with the experiment, josh has 20 g of element a and b combined. this demonstrates what law?
josh has 10 g of element a and 10 g or element b. when finished with the experiment, josh has 20 g of element a and b combined. This demonstrates ' Law of conservation of mass'.
In a closed system, mass cannot be created or destroyed, but it can be changed from one form to another. Thus, mass of a system remains same before and after the reaction.
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g if a hand cream appears smooth and uniform after you prepared it, but after a week of storage most of the water and most of the oil separated, what do you think must have gone wrong with the preparation?
Because of Emulsion, when we store hand cream for a week its oil and water get separated.
Water and oil are necessary to make hand cream. water is an emulsifying agent.oil and water mixtures are emulsions when shaken together.The oil will form droplets and dispersed throughout the water.In this process,the most necessary is to mix the oil and water properly.The content of the ingredients may have been miscalculated or the temperature of the water is not enough.
Emulsifiers are added to hand cream.This is based on chemicals phospholipids.These are obtained from plants,nuts,berries ,leafs etc.
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Balance the chemical equation for the
conversion of titanium dioxide to titanium chloride.
TiO₂ + Cl₂ + C → TICI + CO₂
Answer:
Explanation:
Here, we see that on the left-hand side the elements are as such -
TI - 1
O - 2
Cl - 2
C - 1
On the right-hand side, we have -
TI - 1
Cl - 1
C - 1
O - 2
So, this is how they will be balanced out -
2TIO₂ + Cl₂ + 2C => 2TICl + 2CO₂
Which of the following are spectator ions in the equation below? Select all that apply
Pb(C₂H302)2(ag) + 2 LiCl(ag) 2 LIC₂H302(ag) + PbCl2(s)
Pb2+(aq)
Li+(aq)
Cl-(aq)
C2H3O-2(aq)
I hope i entered the answer options right
How many electrons are located in the outermost orbit in the bohr model of a boron atom?.
The number electrons in the outermost orbit in the Bohr model of a Boron atom is 3. The outermost orbit of the electrons of a Boron atom is in the L-shell.
What is Bohr model?The Bohr model is a structural model of an atom where the electrons revolve around the nucleus of an atom in distinct circular orbits (shells). Each shell has a maximum number of electrons by this formula: 2n², where n is the principal quantum numbers (n = 1, 2, 3, 4, ...).
The 1st orbit called K-shell has the maximum electrons 2(1)² = 2.The 2nd orbit called L-shell has the maximum electrons 2(2)² = 8.The 3rd orbit called M-shell has the maximum electrons 2(3)² = 18.The 4th orbit called N-shell has the maximum electrons 2(4)² = 32.The 5th orbit called O-shell has the maximum electrons 2(5)² = 50.The composition of numbers of electrons in each shell of an atom is called electronic configuration.
Boron is an atom with the atomic number 5. So, it has 5 electrons. The electronic configuration is
K-shell = 2 electronsL-shell = 3 electronsL-shell is the outermost orbit in the Bohr model of a Boron atom.
Hence, the number of electrons in the outermost orbit in the Bohr model of a Boron atom is 3.
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what is the main safety hazard of tmscl in this lab, and what precautions should you take when handling tmscl?
The main safety hazards of trimethylsilyl chloride (tmscl) in the lab are,
It could cause severe eye burns.
It is harmful if absorbed through the skin. It could cause severe burns.
It may be harmful if swallowed. Causes severe digestive tract burns.
It may be harmful if inhaled. Causes chemical burns to the respiratory tract.
Prolonged or repeated skin contact may cause dermatitis.
Trimethylsilyl chloride, commonly referred to as chlorotrimethylsilane, is a silyl halide (organosilicon chemical) with the formula (CH3)3SiCl. It is also referred to as Me3SiCl or TMSCl. It is a volatile, colorless liquid that is stable when there is no water present. It has many applications in organic chemistry.
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in a mixture of an alcohol and ketone of equal molecular weight, which will have the larger rf value and why?
The ketone will have a larger rf value because it is more polar than the alcohol.
Does more polarity suggest a greater or lesser Rf value?
Calculating the Rf value is possible if you can see the spots.The identity and properties of the various compounds can be established using the Rf values.Since more polar compounds have a stronger affinity for the polar solid phase, they will have smaller Rf values.Rf values are typically higher for low-polarity chemicals compared to higher-polarity ones. Generally speaking, as the polarity of a compound increases, so does its absorptivity (i.e., the more polar the compound, the stronger it binds to the adsorbent).To learn more about Rf values, follow the link https://brainly.com/question/26639192
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an indium (in) atom has 49 electrons. electrons in which subshell of the indium atom ground state experience the lowest effective nuclear charge (z* or zeff)?
5p subshell of the indium atom ground state experience the lowest effective nuclear charge (Z or Zeff)
Atomic number of indium = 49
E.C of indium = [Kr]4d¹⁰5S²5p¹
The outer 3 electrons indicate that indium is a 3rd group element
In the ground state, the outer electrons of In are present in the 5s and 5p orbitals
So among 5s and 5p which will experience the lowest nuclear charge (Zeff)
The nuclear charge depends on the shape of the orbital
5s has spherical shape while 5p has DB shape
Among the spherical and DB shape, the second one experiences the lower nuclear charge.
So the answer is 5p subshell of the indium will experience the lowest effective nuclear charge (Z or Zeff)
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Five waves measure 25 cm and pass a point in 1 s. What is:
the wavelength
the frequency
the period?
Five waves measure 25 cm and pass a point in 1 s then the wavelength is 5cm the frequency is 5Hz and the period is 5 s
Wavelength is the distance between identical point in the adjacent cycle of a waveform signal propagated in space or along a wireFrequency is the number of waves that pass a fixed point in unit timeThis means the period of a wave is the inverse of the frequency so the formula for wave period is wavelength divided by velocityHere given data is
Five waves measure 25 cm and pass a point in 1 s
So, the wavelength = λ = v/f
Wavelength = 25 cm/5 waves
Wavelength = 5cm
Frequency = 1/T
Frequency = 1/5 = 5Hz
Period = 1/frequency
Period = 1/5 = 5 s
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Ionic bonds have all of the following properties, except ___.
soluable (ability to dissolve) in water
strong crystalline solids
generally white in color
when dissolved are electrically conductive
Calculate the AG° at 298 K for the following reaction. Show your work.
Fe₂O3(s) + 13CO(g) → 2Fe(CO),(g) + 3CO₂(g)
-824.2 -110.5
-733.8
-393.5
AH (kJ/mol)
87.4 197.6
AS (J/mol K)
445.2
213.6
The ΔG at 298K of the given reaction is -304.08kJ/mole.
Combustion is a high-temperature exothermic redox chemical reaction between a fuel and oxygen oxides. Photosynthesis is an example of an involuntary reaction. Plants absorb water and carbon dioxide. But for it to change, it needs sunlight. This is an involuntary reaction.
calculation:-
ΔG = ΔH -TΔS
Hence,
= (-733.8-393.5+824.2+110.5) - 298*(445.5+213.6-87.4-197.6)/1000
= -304.08kJ/mole
A spontaneous reaction is one that promotes the formation of products under the conditions under which the reaction occurs. A roaring campfire is an example of a natural reaction because it is exothermic. Processes that are spontaneous in one direction under certain conditions are not spontaneous in the reverse direction. For example, at room temperature and normal atmospheric pressure ice naturally melts but water does not naturally freeze.
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the following metal specimen was tensile tested until failure. which type of metal would experience this type of failure?
brittle metal would experience this type of failure
Glass, ceramic, graphite, and some alloys with very low plasticity are examples of brittle materials. In these materials, cracks can start without plastic deformation and quickly progress to brittle breakage. It is a steel-gray, lightweight metal called beryllium. It is also highly brittle, which means that it fractures easily when under stress but does not typically distort before it does so (similar to glass or ceramic). Beryllium is a naturally occurring element found in over 100 different minerals and has a wide range of modern-day applications. Cast iron has a rough feel and is more brittle because it includes 2% to 3.5% carbon. Despite being made of alloyed metals, carbon steel lacks other alloying components, hence despite being an alloy, it is not classified as an alloy.
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two absorption peaks located near 255 nm are separated by 0.03 nm. what minimum resolution must a grating have in order to separate these wavelengths?
The minimum resolution to separate these wavelengths is 250nm as they are located near 255n and 0.03nm.
Resolution also known as optical resolution or chiral resolution, or chiral activity refers to the activeness of the compound. It is the process in which two racemic mixtures are separated into its components.
Wavelength is known as the distance between two repeated waves of light. Wavelength is denoted by the symbol lambda (λ). It gives us the idea of the speed or pace of a particular light.
In the given condition, two absorption peaks - absorption spectroscopy is the absorption spectrum between which the light releases protons. Therefore, the wavelength to separate these two absorption peaks is 250nm in minimum.
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if the bromobenzene is added too quickly, what side product is formed (draw the structure in pen and name it!)?
If the bromobenzene is added too quickly, biphenyl is formed as the side product with the Grignard reagent.
What is Grignard reagent?
Grignard reagent is an organomagnesium halide which has the formula RMgX where R is alkyl or aryl group, Mg is magnesium, X is an halide.
When bromobenzene is added too quickly to the Grignard reagent, biphenyl is formed as a by-product. the formation of the side product is enhanced by high temperature. So, this reaction is carried out in low temperature.
Therefore, biphenyl is formed as side product when bromobenzene is added quickly to the Grignard reagent. The structure of biphenyl is two benzene rings joined together.
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if you close a pressure cooker with the contents at 280k and 1 atm, what is the pressure when the contents are heated up to 406k ?
The new pressure will be 1.45atm.
Ideal gas equation gave a relation between pressure, temperature and volume. It can be expressed as:
PV=nRT
Where, P is pressure, V is volume and T is temperature
The given data:
[tex]T_{1}[/tex] = 280K
[tex]T_{2}[/tex]= 406K
[tex]P_{1}[/tex] = 1 atm
[tex]P_{2}[/tex] = ?
The amount of unknown pressure can be determined by using the formula:
P1/T1=P2/T2....(i)
Now, put the values of given data in above equation.
P2= P1T2/T1
P2=1×406K / 280
P2 = 1.45atm
Therefore, the new pressure will be 1.45atm
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5
Use this equation for the next question.
Mg(OH)2 + NaCl ® MgCl₂ + NaOH
Does it satisfy the Law of Conservation of Matter?
Yes
No
Answer:
Chemistry Secondary School answered Mg (OH)₂ + HCl→ MgCl₂ + H₂O balance it Answer 5.0 /5 6 Diabolical Answer: The answer will be; = Mg (OH)₂ + 2 HCl → MgCl₂ + 2 H₂O That's all. Find Chemistry textbook solutions? Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6 Preeti Gupta - All In One Chemistry 11 3080 solutions
14.55ml of 0.3674 m naoh was required to neutralize 25.00 ml of hcl with an unknown concentration. what was the concentration of the hcl solution in the units of mol/l?
14.55ml of 0.3674 m NaOH was required to neutralize 25.00 ml of HCl with an unknown concentration. the concentration of the HCl solution in the units of mol/l is 0.212 mol / L.
given that :
volume V1 = 14.55 mL = 0.0145 L
Molarity M1 = 0.3674 M
Volume V2 = 25 mL = 0.025 L
molarity M2 = ?
using the formula for dilution , we get ;
M1 V1 = M2 V2
0.3674 × 0.0145 = M2 × 0.025
M2 = 0.0053 / 0.025
M2 = 0.212 M = 0.212 mol / L
Thus, 14.55ml of 0.3674 m NaOH was required to neutralize 25.00 ml of HCl with an unknown concentration. the concentration of the HCl solution in the units of mol/l is 0.212 mol / L.
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5. describe a process in which 2 substances that are mixed together can be separated from each other. would this be a physical change or a chemical change? provide an explanation for your answer.
When two compounds are combined and change into a third substance, this is referred to as a biochemical reaction (or chemical reaction). When two substances are combined, not all of them react chemically.
How does chemical change?When one chemical material changes into one or more others, as when iron rusts, this is referred to as a chemical transformation. Chemical reactions produce changes in the way that molecules and atoms are ordered, which leads to the formation of new substances with new properties.
Describe a chemical example:Examples for chemicals include the basic building blocks, such as zinc, nitrogen, and oxygen; combinations created from these building blocks, such as water, dioxide, or salt; and more complicated substances, such as the air you breathe, rainfall, a chicken, a car, etc.
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