Identify a compound that has a formula of C5H10O and a 1H NMR signal at δ9.5.
a. A carboxylic acid
b. An aldehyde
c. A ketone
d. An ester
e. An alcohol

Answer:

Explanation:

A. Synthesis reaction

(i) The type of reaction mechanism that describes the reaction of pent-1-ene and HBr is electrophilic addition.(ii) The mechanism for the reaction making the two possible products is as follows: Step 1: The HBr's hydrogen polarizes the double bond electrons in pent-1-ene.

This results in a dipole moment.Step 2: The Br- ion is attracted to the electron-deficient carbon in the pent-1-ene double bond and approaches it from the opposite direction of the dipole moment, resulting in a Br+ ion and a pent-1-ene carbocation.Step 3: The Br- ion attacks the carbocation to form 2-bromopentane. Step 1: The HBr's hydrogen polarizes the double bond electrons in pent-1-ene. This results in a dipole moment.Step 2: The Br- ion is attracted to the electron-deficient carbon in the pent-1-ene double bond and approaches it from the opposite direction of the dipole moment, resulting in a Br+ ion and a pent-1-ene carbocation.Step 3: A Br- ion attacks a secondary carbon atom in the pent-1-ene molecule, resulting in a new Br+ ion and 3-bromopentane formation.

The reaction is regioselective since the bromine ion attacks the secondary carbon atom instead of the primary one because the secondary carbocation is more stable than the primary carbocation.(iii) Using the mechanism, the 2-bromopentane compound will be the main product due to the more stable tertiary carbocation intermediate formed during the reaction.

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8.96 is the pH after 15.00 ml of hcl has been added.

What is pH?

The H+ ion concentration's negative logarithm is known as pH

We are aware that not every acid or base reacts with a chemical substance at the same pace. Other people respond extremely strongly, some people mildly, and some people don't react at all. We utilise a universal indicator that exhibits various colours at various concentrations of hydrogen ions in solution to objectively assess the strength of acids and bases

0 mL of NaOH has not been added, leaving a pH of 2.32.

Only HCOOH is present in the solution prior to the addition of any NaOH. The balance of the HCOOH in solution controls pH.

Ka = HCOO- concentration times H3O+ concentration divided by HCOOH concentration

8.96 is the pH after 15.00 ml of hcl has been added.

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Answer:

its B

Explanation:

in the water cycle evaporation ALWAYS happens first because of the suns rays on the ocean heating it up and then it condenses slowly into a liquid and then it starts to rain when the cloud can no longer hold in the condensed now rain in the atmosphere there for it falls heavy or light and into lakes ponds ans creeks and oceans and it starts again

Answer:

1.92

Explanation:

The experimental rate law is; Rate = k[O2] [NO]^2

Thus the reaction is first order with respect to oxygen and second order with respect to nitrogen monoxide

The rate constant, represented by the symbol k, is a proportionality constant that relates the rate of a chemical reaction to the concentration of reactants. The rate constant is specific to a particular reaction and is determined experimentally.

The rate law of a chemical reaction expresses the relationship between the rate of the reaction and the concentrations of the reactants.

We know that;

2.56 * 10^-1/8.52 * 10^-2 = (0.09/0.03)^n

3 = 3^n

n = 1

Again;

7.67 * 10^-1/8.52 * 10^-2 = 0.06/0.02

9 = 3^n

3^2 = 3^n

n = 2

The rate law is;

Rate = k[O2] [NO]^2

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Answer: D: planets

Explanation:

The balanced chemical equation for the given reactions is 4 MnO₄- +  5 CH₃OH =4  Mn²+ + 5  HCO₂H and As₂O₃ +  2 NO₃- + 2 H+ +2 H₂O =  2 H₃AsO₄ + N₂O₃ which is obtained by balancing oxidation numbers.

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

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

The first chemical equation was put forth by Jean Beguin in 1615.The redox reactions are balanced by balancing oxidation number of each element.

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Answer:

Atomic mass. 207.2 g.mol -1. Electronegativity according to Pauling. 1.8. Density. 11.34 g.cm-3 at 20°C. Melting point. 327 °C. Boiling point. 1755 °C.

Explanation:

i think

Based on the dissolution equation of BaSO4, the solubility product, Ksp, expression of BaSO4 is: [Ba^{2+}] × [SO4^{2-}]

The solubility product, Ksp, of a substance is an equilibrium constant which expresses the product of the concentration of ions produced by a solute.

The solubility of a solute depends on temperature, thus solubility product also depends on temperature.

The balanced equation for the dissolution of barium sulfate is given below:

The solubility product for barium sulfate is given as;

Ksp = [Ba^{2+}] × [SO4^{2-}]

Therefore, the solubility product, Ksp, expression of BaSO4 is: [Ba^{2+}] × [SO4^{2-}]

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Answer:

a) overall charge will be neutral.

Explanation:

The Ph value for Pro will be neutral and neutral charge on the Ser. Molecules of atoms generally have neutral electrical charge. If the overall charge of a peptide is negative then it is considered as negative. Pro and Ser amino acids have neutral Ph values.

Answer:

3 moles of Argon

Explanation:

The molar mass for argon is 39.948 g/mol

\(\frac{120g}{39.948g/mol} = 3.004molesAr\)

Answer:

156.07 lb/cu ft

Explanation:

Answer:

yes

Explanation:

you should do this Elena's aunt pays her $1 for each call she makes to let people know about her aunt's new business. The table shows how much money Diego receives for washing windows for his neighbors. Select ALL the statements about the situation that are true. (this is problem 3 on page 90 in your book) *

3 points

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Elena makes more money for making 10 calls than Diego makes for washing 10 windows.

Diego makes more money for washing each window than Elena makes for making each call.

Elena makes the same amount of money for 20 calls as Diego makes for 18 windows.

Diego needs to qash 35 windows to make as much money as Elena makes for 40 calls.

The equation y=9/10x, where y is number of dollars and x is number of windows, represents Diego's situation.

The equation y=x, where y is the number of dollars and x is the number of calls, represents Elena's situation.

This is an extremely high concentration, at this concentration, the solution would likely be a solid rather than a liquid due to the formation of NaCl crystals.

To determine the type of NaCl solution, we need to know the amount of NaCl and the amount of water present in the solution. The concentration of NaCl can be expressed in different units, such as mass percent, mole fraction, or molarity.

The number of moles of NaCl can be calculated from the mass of NaCl and its molar mass. The molar mass of NaCl is 58.44 g/mol.

Number of moles of NaCl = mass of NaCl / molar mass of NaCl

Number of moles of NaCl = 20 g / 58.44 g/mol

Number of moles of NaCl = 0.342 mol

Assuming that NaCl is completely miscible with water and that the density of the solution is close to the density of water at 30°C (0.995 g/mL), we can estimate the volume of the solution as follows:

Volume of solution = mass of NaCl / density of solution

Volume of solution = 20 g / (0.995 g/mL)

Volume of solution = 20.10 mL

Molarity = number of moles of NaCl / volume of solution

Molarity = 0.342 mol / 0.0201 L

Molarity = 17.01 M

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The product of an acid-base reaction that is most likely to be an ionic compound is a salt. Option D).

In an acid-base reaction, the product that is most likely to be an ionic compound is a salt. A salt is formed when an acid reacts with a base, resulting in the transfer of ions between the two reactants. Acids typically release hydrogen ions (H+) when dissolved in water, while bases release hydroxide ions (OH-). When these ions combine, they form water (H2O), which is a neutral molecule.

However, in addition to water, the reaction between an acid and a base also produces a salt. A salt is an ionic compound composed of positive and negative ions. The positive ion usually comes from the base, while the negative ion comes from the acid. The combination of these ions results in the formation of an ionic compound, which is commonly referred to as a salt.

Therefore, the product of an acid-base reaction that is most likely to be an ionic compound is a salt. Hence option D) is correct.

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Answer:

6.408924056 miles/hour.

Explanation:

First we have to convert 247.54 km to miles. The conversion factor will be 1 km = 0.621371 miles. To do this I set up my stoichiometry.

247.54km | 0.621371miles = 153.8141773 miles

                 |  1 km

Now we have 153.8141773 miles per 1 day. The conversion factor will be 1 day = 24 hours.

153.8141773 miles | 1 day       6.408924056 miles/hour.

1 day                      | 24 hours

(if you need to know what I did with the stoichiometry just ask! I'll be happy to help!)

Answer:form when magma and lava cool :/

Explanation:hope this helps, and I’m this because ingenious rocks are made/ formed from magma and lava.

The phrase which best describes igneous rocks is option A, .i.e., it forms when lava and magma cool.  

Igneous rocks are formed by the melting of  earth's crust  into magma, . The two types of this rocks are, Extrusive and intrusive igneous rocks . The slow cooling of magma beneath the surface results in intrusive igneous rock.

Magma in the crystal is in molten liquid state which heat by convection and flows out. This creates slight movement in plates and the hot mantle the cools down to form igneous crystals.

Extrusive igneous rock is created when lava above the surface cools quickly. The magma hardens more quickly after being brought to the surface via cracks or volcanic explosions. As a result, these rocks are crystalline, smooth, and fine-grained.

Thus regarding the formation of igneous rocks, option A is correct.

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Answer:

A = ₋₁⁰e

Explanation:

Alpha beta and gamma radiations are the examples of ionizing radiations. When an atom is an excited state and having high energy, the atom is in unstable state. The excess of energy is released by the atom to get the stability. The released energy is in the form of radiations which may include alpha, beta, gamma, X-ray etc.

Beta radiations:

Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.

The mass of beta particle is smaller than the alpha particles.

They can travel in air in few meter distance.

These radiations can penetrate into the human skin.

The sheet of aluminum is used to block the beta radiation

⁶⁷₂₉Cu   →   ⁶⁷₃₀Zn + ⁰₋₁e

The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.

Answer:

A. beta particle,

0−1e

Explanation:

i just finished mine and it was correct

The excess reactant is Al, and the mass of the remaining excess Al after the reaction is 16.5 grams.

To determine the excess reactant and the mass of the remaining excess reactant, we need to first write and balance the chemical equation for the reaction between \(Fe_{2} O _{3}\) and Al:

2 \(Fe_{2} O _{3}\) + 2 Al → \(Al_{2} O_{3}\) + 4 Fe

From the balanced equation, we can see that the stoichiometric ratio of \(Fe_{2} O _{3}\)to Al is 2:2, or 1:1. This means that both reactants are consumed in equal amounts, and neither is in excess.

To confirm this, we can calculate the amount of product formed by each reactant and compare it to the actual amount of product formed:

For \(Fe_{2} O _{3}\) : Using its molar mass of 159.69 g/mol, the number of moles of Fe2O3 is 35.0 g / 159.69 g/mol = 0.2192 mol. According to the balanced equation, 2 moles of \(Fe_{2} O _{3}\) produces 4 moles of Fe. Therefore, the number of moles of Fe produced from 0.2192 mol of \(Fe2O _{3}\) is (4/2) x 0.2192 = 0.4384 mol.

For Al: Using its molar mass of 26.98 g/mol, the number of moles of Al is 30.0 g / 26.98 g/mol = 1.111 mol. According to the balanced equation, 2 moles of Al produces 4 moles of Fe. Therefore, the number of moles of Fe produced from 1.111 mol of Al is (4/2) x 1.111 = 2.222 mol.

We can see that Al produces twice as much Fe as \(Fe_{2} O _{3}\), indicating that \(Fe_{2} O _{3}\) is the limiting reactant and Al is in excess. However, we also need to calculate the mass of the remaining excess Al:

The number of moles of Al that reacted is 1.111 - 0.5 (since 2 moles of Al react with 2 moles of \(Fe_{2} O _{3}\)) = 0.611 mol.

The mass of the remaining excess Al is therefore 0.611 mol x 26.98 g/mol = 16.5 g (rounded to one decimal place).

Therefore, the excess reactant is Al, and the mass of the remaining excess Al after the reaction is 16.5 grams.

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Answer: Moving water causes soil and rock erosion. Moving water carries bits of rock and soil and deposits them in other places. It moves rocks and soil from mountaintops to flat land. Rivers carry rock and soil and deposit them far away from where they were.

Explanation:

Answer:

Well, moving water will cause soil and rock erosion.  it also will carry bits of rock and soil and will deposit them into the other places. It will move the rocks and the soil from the mountaintops to the flat land. Rivers can also carry rock and soil and deposit them far away from where they were.

When an electron in a hydrogen atom at level 1 absorbs 10.2 eV of energy, it becomes excited and moves to level 2. Typically, the electron will then release this energy as a photon and return to its original level (level 1) in a process called spontaneous emission. This transition releases a photon with the same energy as the absorbed one, which is 10.2 eV.

When an electron in a hydrogen atom absorbs 10.2 eV of energy and moves from level 1 to level 2, it becomes excited. Typically, the excited electron will eventually release this energy in the form of a photon, as it returns to its ground state. This process is known as spontaneous emission. The wavelength of the photon emitted will correspond to the energy difference between the two energy levels.

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The number of moles of H₂O is  0.36 mol.

The number of moles of LiClO₄ is  0.0521  mol.

Mole is an important standard unit used for the measurement of large quantities of atoms, molecules, or other particles. One mole is equal to 6.022×10²³ units.

The number of moles of a substance is calculated by:

Moles =\(\frac{mass}{molar \;mass}\)

To find the number of moles of H₂O:

Mass of H₂O in the sample = 6.579 g

The molecular weight of H₂O = 18.02g

Moles = \(\frac{mass}{molar \;mass}\)

Moles = \(\frac{6.579 g}{18.02g}\)

Moles = 0.36

To find the number of moles of \(ZnSO_4\):

Mass of \(ZnSO_4\) in the sample = 8.421 g

The molecular weight of \(ZnSO_4\)= 161.47 g/mol

Moles =\(\frac{mass}{molar \;mass}\)

Moles = \(\frac{8.421 g}{161.47 g/mol}\)

Moles = 0.0521 moles

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Titration

citric acid: CH₃COOH, c = 1

caustic soda: NaOH  c = 1

V₁M₁c₁=V₂M₂c₂ (c = valence)

\(\tt 32.27\times 0.0148\times 1=25\times M_2\times 1\\\\M_2=0.019\:M\)

The citric acid concentration in a soda if it requires 32.27 ml of 0. 0148 m NaOH to titrate 25.00 ml of soda is 0.0064 M.

Titration is defined as the process of chemical analysis in which the quality of some constituent  of a sample is determined by adding to the measured sample an exactly known quantity of another substance with which the desired constituent  reacts in definite known proportion.

The chemical reaction of citric acid with NaOH is
H₃C₆H₅O₇ + 3NaOH -> Na₃C₆H₅O₇ + 3H₂O

According to law of equivalence

M1V1 / n1 = M2V2 / n2

M1 = M2V2 x n1 / n2 x V1

M1 = 0.0148 x 32.27 X 1 / 3 x 25

M1 = 0.0064 M

Thus, the citric acid concentration in a soda if it requires 32.27 ml of 0. 0148 m NaOH to titrate 25.00 ml of soda is 0.0064 M.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

B: The colors of light emitted from heated atoms had very specific energies.

Explanation:

dont know if its the same question i had on edg but i think its B. Sorry if i didnt understand the question :)

Answer:

b

Explanation:

Answer:

Explanation:

Mnemonic Device: Kings Hate Dragons Because Dragons Can't Make Money. Explanation: to remember the Metric prefixes, or the decimal ladder, and base unit (Kilo, Hecto, Deca, Base, Deci, Centi, Milli, Micro).