the group that is anti to oxygen migrates in the pinacol rearrangement of the diol shown. what is the product?
Answers
The elimination of water from pinacol under acid catalysis produces t-butyl methyl ketone in the conversion that gave this reaction its name.
Diol rearrangement by pinacol?Quaternary centers to a carbonyl group have frequently been formed by the pinacol rearrangement of vicinal diols. In fact, it provides a quick and highly convergent access to this kind of carbon structure when coupled with a pinacol connection. a carbonyl group and a C bond.Vicinal diols undergo the pinacol rearrangement, a particular elimination reaction, in an acidic environment.In organic chemistry, the pinacol-pinacolone rearrangement is a technique for changing a 1,2-diol into a carbonyl molecule.The elimination of water from pinacol under acid catalysis produces t-butyl methyl ketone in the conversion that gave this reaction its name.To learn more about t-butyl methyl ketone refer to:
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Related Questions
Which substance cannot be separated or broken down into simpler substances by chemical means?
table salt
gold wire
candle wax
water vapor
Answers
Answer: Gold Wire
Explanation:
Out of all of these options only gold wire is an element, elements are pure and cannot be broken down by any chemical means
hope it helped, good luck :)
A mechanical wave starts when matter is disturbed by a source
of_______ I NEED ANSWER ASAP
Answers
Answer:
i believe energy is your answer here
Escribe la fórmula de los siguientes compuestos: Triyoduro de fosoro Carburo de silicio Tetracloruro de azufre Pentayoduro de nitrógeno Heptafluoruro de cloro Seleniuro de teluro (VI) Tribromouro de antimonio Nitruro de fósforo (III) Sulfuro arsénico
Answers
Answer:
hola, tuve que usar el traductor de google en esto. Ni siquiera sé si entenderás esto, pero vale la pena intentarlo. y la cuestión es que no tengo la respuesta a esto, pero tenía ganas de responder en español :) por favor, responda en español para que pueda responder con una respuesta en español porque ¡esto es divertido! Esta es la tercera respuesta en español que he hecho esta noche y no tengo la intención de detenerme ahora. Sin embargo, me estoy quedando sin cosas que decir. jaja
Explanation:
Iron will react with water to produce an iron oxide and hydrogen gas. Which equation below represents a correctly balanced equation for this reaction?
A . a
B. b
C. c
D. d
Answers
The balanced equation for the reaction of iron with water that results in the production of iron oxide and hydrogen gas is
3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)
Iron does not react directly with liquid water but react with water vapour. When the reaction happens, it results in the formation of a solid and a gas. The products of the reaction are Iron oxide and hydrogen. The equation of the reaction would be
Fe (s) + H₂O (g) → Fe₃O₄ (s) + H₂ (g)
Now, we need to balance the equation. On the right-hand side, we have 3 Fe, 4 O and 2 H. Similarly on the left-hand side there are 1 Fe, 1 O and 2 H.
To balance the equation, we add 3 to Fe, 4 to H₂0 and 4 to H₂.
As a result, the balanced chemical equation for the reaction would be
3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)
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What atomic transition occurs in atoms of hydrogen gas in the galactic spiral arms to produce 21-cm radio emission? quizlwert
Answers
The 21-cm radio emission in the galactic spiral arms of hydrogen gas (H) is produced by the atomic transition known as the hyperfine splitting of the electron spin levels in the ground state.
Hydrogen gas in the interstellar medium (ISM) emits radiation at a wavelength of 21 centimeters (or 21 cm) due to the hyperfine splitting of the electron spin levels in its ground state.
This phenomenon occurs when the electron in a hydrogen atom, which has a single proton in its nucleus, undergoes a transition between two hyperfine levels with slightly different energies.
Hyperfine splitting is caused by the interaction between the magnetic moment of the electron and the magnetic field generated by the nucleus. In the ground state of hydrogen, the electron can be in either a parallel (spin-up) or an antiparallel (spin-down) orientation with respect to the nuclear magnetic field.
These two spin states have slightly different energies, resulting in a small energy difference, which corresponds to a wavelength of 21 cm.
The 21-cm radio emission from hydrogen gas is a crucial tool in radio astronomy, as it allows scientists to study the distribution and dynamics of hydrogen gas in galaxies, including the spiral arms, and provides valuable information about the structure and evolution of the interstellar medium.
The observation of 21-cm radiation has played a significant role in our understanding of the Milky Way galaxy and other galaxies in the universe.
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Which statement about noble gases is correct? *
They are extremely rare in nature.
They are highly reactive with both metals and nonmetals.
O They exist as single atoms rather than as molecules.
O They form compounds with very bright colors.
Answers
Answer:
Hello There!!
Explanation:
I believe the answer is O They form compounds with very bright colors.
hope this helps,have a great day!!
~Pinky~
The statement about noble gases that is correct is D. They form compounds with very bright colors.
Noble gases simply refers to the elements that have similar properties. Noble gases are colorless, odorless, and have very low reactivity.
Examples of noble gases are helium, argon, Krypton, xenon, etc. Noble gases also form compounds with very bright colors.
In conclusion, the correct option is D.
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The reaction between hydrogen gas and chlorine gas produces hydrogen chloride according to the following equation: H2(g) + Cl2(g) → 2HCl(g). Using the following bond enthalpies(D) calculate the enthalpy of reaction. D(H-H) =436 kJ/mol; D(Cl-Cl) = 243 kJ/mol D(H-Cl) = 432 kJ/mol
Answers
Answer:
The enthalpy of reaction is -185 kJ
Explanation:
To get the reaction:
H₂(g) + Cl₂(g) → 2 HCl(g)
you must follow the following steps:
1) Reactive molecules must break their bonds to obtain their atoms.
H₂(g) → 2 H(g)
Cl₂(g) → 2 Cl(g)
Bond energy (or enthalpy) is the energy required to break one mole of bonds of a gaseous substance. In the case of diatomic molecules with a single bond, it corresponds to the energy necessary to dissociate 1 mole of said substance in the atoms that form it.
Whenever you want to break links you must supply energy, so the link enthalpy will have positive values; while when a mole of bonds is formed energy is released and the bond enthalpy of this process will be negative.
In this case you will then have:
H₂(g) → 2 H(g) ΔH=436 kJ/mol
Cl₂(g) → 2 Cl(g) ΔH=243 kJ/mol
So the total energy needed to break all the bonds is:
ΔH=1 mol*436 kJ/mol +1 mol* 243 kJ/mol= 679 kJ
2) The atoms that were obtained in the break of the bonds must be combined to obtain the product.
2 H (g) + 2 Cl (g) → 2 HCl (g)
Being the single bond energy for one mole of 431 kJ H-Cl bonds and considering that two moles of H-Cl bonds are formed, the ΔH is:
ΔH = -2 moles* (432 kJ/mol) = -864 kJ
As mentioned, when a mole of bonds is formed energy is released, the bond enthalpy of this process will be negative. So the formation of HCl is negative.
Hess's law states that the energy change in an overall chemical reaction is equal to the sum of the energy changes in the individual reactions comprising it. So:
ΔHtotal= -864 kJ + 679 kJ
ΔHtotal= -185 kJ
The enthalpy of reaction is -185 kJ
Consider an energy diagram of two energy levels, one at 0 cm-1 and one at 300 cm-1. a. At what temperature will the probability of occupying the second energy level be 0.15? b. Consider the same situation but imagine you could locate two particles now in the second energy level (imagine the spin in an electronic system, where you can place 2 electrons per energy level, from 152). Do you expect the temperature to be higher or lower than in case a? Why? (no calculations needed)
Answers
The probability of occupying the second energy level in an energy diagram of two energy levels, one at 0 cm-1 and one at 300 cm-1, will be 0.15 when the temperature is 874 K (600°C)
We can write the formula as, Substituting the values: E2 - E1 = 300 cm-1 (which equals to 3 × 104 m-1 or 3.96 × 10-19 J).Then the probability of occupying the second level be 0.15 when the temperature is 874 K (600°C).
If two particles are in the second energy level, then the temperature will be higher than in case a. This is because having two particles in the second energy level (instead of none) indicates that there is an external source of energy that has raised the temperature of the system, since at lower temperatures, particles will occupy the lowest possible energy level.
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What is the minimum amount of material that must be present in a living organism?
Answers
Answer:
Living things can have a minimum of one cell
Explanation:
Living things can have a minimum of one cell; these are called unicellular organisms. Some examples of unicellular organisms: bacteria, algae (plants), some fungi, and protozoa
hope this helps!
In an ecosystem ,cell is the minimum amount of material that must be present in a living organism.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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When drawing a Fischer projection of a sugar, what is placed at the top of the vertical line?
the –H group
the –OH group
a double horizontal line
the aldehyde group
Answers
When drawing a Fischer projection of a sugar, the -OH group is usually placed at the top of the vertical line.
This is because in a Fischer projection, the horizontal lines represent bonds that project out of the plane of the paper, while the vertical lines represent bonds that project into the plane of the paper. The -OH group is usually the most bulky group in a sugar molecule and therefore it is often placed at the top of the vertical line to minimize steric hindrance between adjacent groups.
In a reducing sugar, the aldehyde group is placed at the top of the vertical line instead of the -OH group.
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What is your opinion about:
Plastic goods are essential in our modern world.
Answers
Answer:
I believe that plastic goods are essential to our modern world. Although that they are hard to decompose, they are cheap to produce, and they are very durable.
Explanation:
Explanation:
Plastics clearly constitute an important component of the range of materials used in modern society. Almost all aspects of daily life involve plastics or rubber in some form or the other. ... Owing to their light weight, plastics reduce transportation costs and, therefore, atmospheric carbon dioxide emissions.
A buffer solution is prepared by adding NH4Cl to a solution of NH3 (ammonia).
NH3(aq) + H2O(I) = NH4+(aq) +OH-(aq0
What happens if Ca(NO3)2 is added?
Shifts to reactants, remain the same, shifts to products.
Please HELP!
I watched the video, but I still don't get it!
I don't know how this works
Answers
Answer:
Remains the same
Explanation:
I just got it right on Acellus!
Select whether each example of scientific communication represents a primary source or a secondary source.
A scientist is interviewed on a television program about an important discovery he made in cancer research.
An article in the journal Nature presents the original research results of a recent experiment by a group of biochemists.
An article in a small, specialized journal presents the results of a graduate student’s experiment.
A book summarizes important recent research on marine mammals.
An issue of a popular science magazine reports on some recent findings in brain research.
Answers
Answer:
secondary
primary
primary
secondary
secondary
Explanation:
For the following reaction, the initial [CH4] = 0.115M and at equilibrium the [C₂H₂] = 0.035M. What is the value for Kc? (give the value to 2 sig figs without units) 2 CH (g) = C₂H₂(g) + 3H₂(g)
Answers
Answer:
0.15
Explanation:
The equilibrium constant expression for the given reaction is:
Kc = ([C₂H₂][H₂]³)/[CH₄]²
Substituting the given equilibrium concentrations, we get:
Kc = [(0.035 M)(0.115 M)²]/(0.035 M)³
Simplifying, we get:
Kc = 0.15
Therefore, the value of Kc for the reaction is 0.15, rounded to 2 significant figures.
When a substance changes
from a liquid to a gas,
the particles move
faster and get
A: closer together
B: farther apart
C: much bigger
Answers
Sold substance a has a melting point at 100c. liquid substance b has a freezing point at 110c. for each substance, identify its state of matter and describe the motion of its particles when the substance is at 115c.
Answers
Substance A is a solid at 115° Celsius. Its particles are not moving while Substance B is a liquid at 115° degrees Celsius. Its particles are moving around freely.
Solid particles in substance A are not moving because they are held together by strong intermolecular forces. Liquid particles in substance B are moving around freely because they are not held together by strong intermolecular forces.
Intermolecular forces are the forces that hold molecules together. These forces are much weaker than the covalent or ionic bonds that hold atoms together in a molecule, but they are strong enough to keep molecules from flying apart. The four main types of intermolecular forces are dipole-dipole forces, London dispersion forces, hydrogen bonding, and ion-dipole forces.
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Balance this equation.
Answers
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
The balanced equation will be :
\( \mathrm{ \boxed2C_4H_{10} + \boxed{13}O_2\longrightarrow \boxed 8CO_2 + \boxed{10}H_2O}\)if the partial pressure of oxygen in air at 1.0atm is 160mmhg , what is the partial pressure on the summit of mt. whitney, where atmospheric pressure is 445 mmhg ? assume that the percent oxygen is the same.
Answers
The partial pressure of oxygen at Mt. Whitney's top is: Total pressure on summit = 0.585 atm x 0.211 atm. (Summit total pressure) = 0.585 atm / 0.211.
Dalton's law of partial pressures, which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each gas in the combination, can be used to calculate the partial pressure of oxygen on the peak of Mt. Whitney.
The partial pressure of oxygen in air at 1.0 atm must first be converted from mmHg to atm:
0.211 atm = 160 mmHg / 760 mmHg/atm
From that, we can determine the partial pressure of oxygen at Mt. Whitney's top using Dalton's law:
0.585 atm = 445 mmHg / 760 mmHg/atm
Hence, the partial pressure of oxygen at Mt. Whitney's top is:
Total pressure on summit = 0.585 atm x 0.211 atm
(Summit total pressure) = 0.585 atm / 0.211
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the gas-phase decomposition of s02cl2, s02cl2(g) ----> s02(g) cl2(g), is first order in s02cl2. at 600 k the half-life for this process is 2.3 x 105 s. what is the rate constant at this temperature? (b) at 320 oc the rate constant is 2.2 x 10--s s-1. what is the half-life at this temperature?
Answers
The gas-phase decomposition of SO2Cl2 is a first-order reaction, and the rate of the reaction is given by the equation: rate = k[SO2Cl2]
The half-life of a first-order reaction is given by the equation: T1/2 = 0.693/k (a) At 600 K, the half-life for the process is 2.3 x 105 s. To find the rate constant at this temperature, we can use the half-life equation to solve for k: T1/2 = 0.693/k ;2.3 x 105 s = 0.693/k ;k = 0.693 / 2.3 x 105 s = 3 x 10^-5 s-1 , (b) At 320 degree celcius , the rate constant is 2.2 x 10^-5 s^-1. To find the half-life at this temperature, we can use the half-life equation and substitute in the given rate constant: T1/2 = 0.693/k;T1/2 = 0.693 / 2.2 x 10^-5 s-1 ;T1/2 = 3.15 x 10^4 s Therefore, the half-life of the reaction at 320 degree celcius is 3.15 x 10^4 seconds.
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GUYS !! So i have a science fair project && we get to pick what we wanna do but i need help , should i do Crystallization or Fingerprint detections ? Because they're both cool.
Answers
Answer:
fingerprint!
Explanation:
sounds cooler, and it should have fewer people in the category, making a higher chance if placing if you do it.
Answer:
Fingerprint detections
Explanation:
I did this a few months ago and lemme tell you..........ITS SO FUN....SO you should do fingerprint detections.
What is the process that wears away the surface of the earth?
Answers
Answer:
erosion
Explanation:
erosion is when the top layer of the earth gets slowly worn away bhy water and ither stuff.
What is the boiling point of a solution of ethanol (C2H5OH) and sugar (C12H22O11) that contains 20.00 g of the sugar in 250.0 g of the ethanol
Answers
The boiling point elevation is a colligative property. From the calculations, the boiling point of the ethanol - sugar solution is 78.65°C.
What are colligative properties?The term colligative properties refers to those properties that depend on the number of solute particles present.
Number of moles of sugar = 20 g/342.3 g/mol = 0.058 moles
Boiling constant of ethanol = 1.22 °C⋅kg/mol
Molality of the solution = 0.058 moles/250 * 10^-3 = 0.232 m
Since sugar is a molecular substance, the Van't Hoff factor is 1
The normal boiling point of pure ethanol is 78.37 °C
ΔT = K m i
ΔT = 1.22 °C⋅kg/mol * 0.232 m * 1
ΔT = 0.28°C
Boiling point of solution = 78.37 °C + 0.28°C = 78.65°C
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Do magnesium nitrate and sodium phosphate react with each other. If they do, what color is the product?
Answers
Answer:
see explanation below
Explanation:
Yes
Mg(NO3)2 + Na3PO4 => Mg3(PO4)2 + 3NaNO3
Magnesium phosphate, Mg3(PO4)2, is a white product that is insoluble in water. Sodium nitrate, NaNO3, is soluble in water making it clear solution.
Which best describes the role of the nephrons ?
Nephrons collect salts to be stored for later use by the body.
Nephrons signal the bladder to release excess urine.
O Nephrons transport urine to the bladder.
Nephrons restore the substances and water the body needs.
Answers
Answer:
c
Explanation:
edge 2021
Answer:
c
Explanation:
Why is the reactivity of metal increase but that of non-metal decreases as we go down in a group of periodic table? (pls its important i need this question's ans for my exam so answer it fast thank you)
Answers
Answer:
Nonmetal reactivity decreases down a group because the nucleus' ability to gain more valence electrons weakens due to more nuclear shielding. For Metals: the most reactive metals are those that can lose their valence electrons the most easily. ... Francium is the most reactive metal
Explanation:
Answer:
While moving from top to bottom in a group of the periodic table, the reactivity of non- metals decreases. ... Thus, the tendency of gaining electron/s in the valence shell decreases as well as the chemical reactivity also decreases on moving from top to bottom in a group of non- metals.
Please help with question
Answers
Answer:
Explanation:
I cant see the question, could you type it out?
A block of wood has a mass of 180 grams it is 10.0cm long, 6.0cm wide and 4.0cm thick what is it’s volume and density
Answers
Answer:
Density = 0.75 g/cm³Explanation:
Density of a substance is given by
\(Density(\rho) = \frac{mass}{volume} \)From the question
mass of the wood = 180 g
Since the wood is a cuboid we can find the volume using the formula
Volume = length × width × height
From the question
length = 10cm
width = 6 cm
height = 4 cm
Volume = 10 × 6 × 4 = 240 cm³
Substitute the values into the above formula and solve for the Density
That's
\(Density(\rho) = \frac{180}{240} \\ = \frac{3}{4} \)We have the final answer as
Density = 0.75 g/cm³Hope this helps you
Silver jewelry is a mixture of silver and copper. If a bracelet has a mass of 23.56 g, and it is 80.1% silver, the mass of silver in the bracelet is Group of answer choices
Answers
Answer:
18.87 g
Explanation:
80.1% of 23.56 g = 18.87 g is the mass of the silver
Courtney burns wood in an outdoor firepit. She measures the mass of the ashes that remain after the fire, and the mass is much lower than the wood that she burned. What would be the best explanation for what Courtney observes?
A. gases are released into the air
B. water inside the wood solidifies
C. heat caused the molecules to lose density
D. atoms in the wood are destroyed
Answers
Courtney burns wood in an outdoor firepit and she measures mass of the ashes that remain after the fire, and mass is much lower than the wood that she burned. The best explanation for what Courtney observes is that: A. gases are released into the air.
What is the best explanation for what Courtney observes?When wood burns, it undergoes chemical reaction called combustion, where it reacts with oxygen from the air to produce carbon dioxide, water vapor and other gases. These gases are released into air as the wood burns and their mass is not accounted for in ashes left behind.
Water inside the wood may also be released as steam during combustion process but this would not explain the significant difference in mass between the wood and ashes.
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can someone help me solve the questions below using the data table below please
DATA TABLE:
Mass of flask and vinegar solution- 25.17g
Mass of flask- 15.12g
Volume of vinegar solution (in mL)- 10.00ml
Initial volume of NaOH (in mL)-0.00ml
Final volume of NaOH (in mL)-39.00ml
CALCULATIONS:
Mass of vinegar solution- 10.0503g
Volume of NaOH used in titration (in mL)-39.00ml
Answers
The percent by mass of acetic acid in the vinegar is 2.33%.
Below are the steps to solve the given problem using the data table given below:
Step 1: Calculate the mass of the vinegar. Given,Mass of flask and vinegar solution- 25.17gMass of flask- 15.12gMass of vinegar solution = Mass of flask and vinegar solution - Mass of flask= 25.17 g - 15.12 g= 10.05 g
Step 2: Calculate the moles of NaOH used in the titration.Molarity of NaOH solution is 0.1 M.Moles of NaOH = Molarity × Volume of NaOH usedMoles of NaOH = 0.1 M × 39.00 mL (since the initial volume of NaOH is 0.00 mL)Moles of NaOH = 0.0039 moles
Step 3: Determine the moles of acetic acid used in the reaction.The balanced chemical equation for the reaction between NaOH and acetic acid (the main component of vinegar) is given below:CH3COOH + NaOH → CH3COONa + H2OMoles of NaOH = Moles of CH3COOH (since they react in a 1:1 ratio)Moles of CH3COOH = 0.0039 moles
Step 4: Calculate the mass of acetic acid used in the reaction.Molar mass of acetic acid is 60.05 g/mol.Mass of CH3COOH = Moles of CH3COOH × Molar mass of CH3COOH= 0.0039 moles × 60.05 g/mol= 0.234 gStep 5: Calculate the percent by mass of acetic acid in the vinegar.Percent by mass of acetic acid = (Mass of CH3COOH / Mass of vinegar solution) × 100%= (0.234 g / 10.05 g) × 100%= 2.33%.
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