Identify the reactant, reagents, and intermediates in the synthetic sequence shown. Reagents may be used more than once or not at all. Draw the intermediate products Band C (both are neutral; omit byproducts). 1.1) NINH Compound B H. Pac 1.2) 1-bromo-2 methylpropane 2.1) NaNH, 2.2 2. butanone 2.3) H* OH step 3 reagent Compound C H, Lindlu's cat Answer Bank HPC NaNH N/NH Boetylene H, Lindtar's cat Incorrect Draw compound B. incorrect Incorrect Draw compound C

Answer:

1.An atom is the defining structure of an element, which cannot be broken by any chemical means. A typical atom consists of a nucleus of positively-charged protons and electrically neutral neutrons with negatively-charged electrons orbiting this nucleus.

2.a chemical process is a method or means of somehow changing one or more chemicals or chemical compounds.

3. a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

If the caffeine concentration in a particular brand of soda is 2.99 mg/oz, drinking, The number of cans of soda would be lethal is 258 cans.

Caffeine is a stimulant. In the brain, it blocks the effects of a chemical called adenosine, which makes you feel sleepy. we then feel more alert and energetic, which is why many people drink soda, coffee or tea to stay awake. Caffeine may keep you awake even if you don't want it to

Given

v = 10 000/3.23 =3095.96 oz

Therefore,

Number of cans = 3095.96 /12 =258 cans

If the caffeine concentration in a particular brand of soda is 2.99 mg/oz, drinking, The number of cans of soda would be lethal is 258 cans.

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Answer:

Because winds are named for the direction from which the wind is blowing, .Explanation: the winds are called the northeasterly trade winds in the Northern Hemisphere and the southeasterly trade winds in the Southern Hemisphere.

The final temperature of the granite and the water in the calorimeter is 8.4°.

We know that in accordance to the first law of thermodynamics, energy is neither created nor destroyed but it can be converted from one form to another. This implies that the heat that is lost by the granite has to be equal to the heat that is gained by the water in this case.

Knowing that;

H = mcdT

H = heat lost or gained

c = specific heat capacity of the substance

dT = temperature change

Heat lost by the granite = Heat gained by water

52.6 * 0.79 * (θ - 125) = 100 * 4.18 * (θ - 20)

41.6θ - 5200 = 418θ - 8360

Collecting the like terms

41.6θ  - 418θ =  - 8360 + 5200

-376.4θ =  -3160

θ = -3160/-376.4

θ = 8.4°

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The correct answer for emperical and molecular formula = C5H14N2 .

3.23 g x (12.011 / 44.0098) = 0.8815 g carbon

1.865 g x (2.016 / 18.0152) = 0.2087 g Hydrogen

1.58 g x (28.014 / 108.009) = 0.4098 g Nitrogen

1.50 g minus (0.8815 + 0.2087 + 0.4098) = 0.

Convert each element's mass to moles.

0.8815 g/12.011 g/mol = 0.0734 mol carbon

0.2087 g 1.008 g/mol = 0.207 mol Hydrogen

0.4098 g 14.007 g/mol = 0.02926 mol Nitrogen

Step three is to calculate the ratio of molar amounts expressed in the smallest, whole numbers.

0.0734 mol 0.02926 mol = 2.51 carbon

7.07 mol hydrogen = 0.207 mol 0.02926 mol

Nitrogen: 0.02926 mol = 1 Nitrogen: 0.02926 mol = 1

Doubling each value yields C = 5, H = 14.14, and N = 2, resulting in the empirical formula C5H14N2. 

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Henri Matisse talked about new ideas in creative expression that he thought were emerging at the moment as well as his vision for modern art.

The use of color and shape to convey emotion, according to Matisse, should take the place of the conventional representational approach that sought to mimic the real world. He held that artists should be allowed the freedom to interpret the world in light of their personal experiences and that contemporary art was really about individual expression.

Matisse believed that contemporary artists should aim for simplicity and clarity in their work, distilling the natural world down to its most basic components. To achieve a sense of coherence in entire composition, he emphasised on significance of balance and harmony in the use of color and shape. Overall, "Notes of a Painter" contributed to the development of the modernist movement in art, which emphasised the value of creativity and individual expression

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Answer: Monika Arora

Explanation:

The writer of ‘Freedom Withdrawal’ is Monika Arora. The book was regarding the communal riots that took place in Delhi, India. This led to deaths of people.

Monika Arora withdrew the publication of the book. The book claimed that the violence in Delhi was caused by Muslim students and also the secular activists.

Answer:

Chemical Energy is stored in food molecules

Answer:

chemical energy

Explanation:

because none of the other make sense

Answer:

Explanation:

40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ

The percent yield of reaction = 65.27%

Reaction

2Pb(s)+O₂(g)⟶2PbO(s)

mass of Lead(Pb) = 451.4 g

mol of Pb (MW=207 g/mol) :

\(\tt \dfrac{451.4}{207}=2.18\)

mol of lead(II) oxide (PbO) based on mol Pb as a limiting reactant(Oxygen as an excess reactant) :

\(\tt \dfrac{2}{2}\times 2.18=2.18\)

mass of PbO(MW=223 g/mol)⇒theoretical :

\(\tt 2.18\times 223=486.14~g\)

The percent yield :

theoretical = 486.14 g

actual = 317.3 g

\(\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{317.3}{486.14}\times 100\%=65.27\%\)

Based on the IUPAC nomenclature of organic compounds, the name of the molecule is 5-ethyl-3-octenal.

The IUPAC nomenclature is the naming convention adopted by the International Union of Pure and Applied Chemistry.

In the naming of organic compounds, the name is divided into three parts;

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If 7.50 mol of NH₃ and 8.15 mol of O₂ react in the following reaction. The number of moles of H₂O that will be formed is 9.84 moles.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

Using the molar coefficients in the balanced equation, 6 moles of water are formed for every 4 moles of NH₃.

6 moles of water are formed for every 5 moles of O₂.

So (7.5 moles NH₃)(6 moles H₂O)/4 moles NH₃) = 11.25 moles water

For (8.20 moles O₂) / (6 moles H₂O)(5 moles O₂) = 9.84 moles H₂O.  

So O₂ is the limiting reagent, and we can only make as much product as allowed by the limiting reagent.

Thus, the number of moles is 9.84 moles of water.

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The best way to measure the pH of a natural solution while out in a forest is to use a portable pH meter or pH test strips specifically designed for field use. These instruments provide accurate and reliable pH measurements and are convenient for outdoor applications.

1. Prepare the necessary equipment: Before heading out to the forest, gather the required tools. You will need a portable pH meter or pH test strips, as well as the necessary reagents or calibration solutions if using a pH meter.

2. Collect the sample: Locate the natural solution you want to measure the pH of, such as a stream, pond, or soil. Use a clean container to collect a representative sample of the solution.

3. Calibrate the pH meter (if applicable): If you are using a portable pH meter, it is essential to calibrate it before taking measurements. Follow the manufacturer's instructions to calibrate the meter using the provided calibration solutions.

4. Conduct the measurement: For pH meters, immerse the electrode into the collected sample. Allow some time for the reading to stabilize, and then record the pH value indicated on the meter's display.

5. Using pH test strips: If you are using pH test strips, dip the strip into the collected sample for the recommended amount of time. Remove the strip and compare the color change with the provided color chart. Determine the corresponding pH value from the chart.

6. Repeat for accuracy: To ensure reliability, repeat the measurement process at least once and compare the results. This step helps confirm the accuracy of your measurements.

7. Record and analyze the data: Note down the pH values obtained and any relevant observations. Analyze the data as needed for your research or monitoring purposes.

By following these steps and using the appropriate equipment, you can effectively measure the pH of a natural solution while in a forest setting.

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Answer: weathering

Explanation: It is slowly by wind or by water

All of the solutions can function as a buffer and the correct option is option 4.

A buffer solution is a water solvent-based solution which consists of a mixture containing a weak acid and the conjugate base of the weak acid or a weak base and the conjugate acid of the weak base.

They resist a change in pH upon dilution or upon the addition of small amounts of acid/alkali to them.

All of these solutions are combinations of weak acid or base with its salt and thus can function as a buffer.

Thus, the ideal selection is option 4.

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There are 8.786 g

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

2.30 x 10²³ atoms in Na :

\(\tt mol=\dfrac{2.3\times 10^{23}}{6.02\times 10^{23}}=0.382\)

mass :

\(\tt mass=mol\times Ar~Na\\\\mass=0.382\times 23=8.786~g\)

Answer:

660 amino acids.

Explanation:

There is 20 amino acids for one base. So you multiply 33x20 to give you 660.

Answer:

Assuming that the DNA strand is read in sets of three nucleotides (codons), then 33 bases would allow for a maximum of 11 codons to be read.

Each codon codes for one amino acid, so 11 codons would allow for the coding of a maximum of 11 amino acids.

Explanation:

Answer:

1.5x10¯⁴Kg

Explanation:

Data obtained from the question include the following:

Volume = 0.1642mL = 0.1642cm³

Density = 0.917g/cm³

Mass =.?

The Density of a substance is simply defined as the mass per unit volume of the substance. Mathematically, it is represented as:

Density = Mass /volume

With the above formula, we can calculate the mass of the ice as follow:

0.917 = Mass / 0.1642

Cross multiply

Mass = 0.917 x 0.1642

Mass = 0.151g

Finally, we shall convert 0.1506g to kg. This is illustrated below:

1000g = 1k

Therefore, 0.151g = 0.151/1000 = 1.5x10¯⁴Kg

Answer:

The ridges on the side of the match and the match tip rub against each other which makes friction and that friction creates a spark and the match lights up.

Explanation:

Answer:

the first option

Explanation:

Answer:

A

Explanation:

If an electron in a hydrogen atom changes from an energy level with primary quantum numbers to the n=2 state, emitting a photon with a wavelength of 434 nm, the value of ni is five.

what does Rydberg's equation explains?

The wavelength of light produced by an electron transitioning between atomic energy levels is predicted by the Rydberg formula. There is just one spectral fingerprint for each element. Light is created when an element is heated in its gaseous state. Bright lines of different colours can be seen when this light filters through a prism or diffraction grating. Each component stands out from the others in some way.

According to the question:

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Answer:

Explanation:

16.540 + 9.32 by rounding each number to the nearest tenth

so 16.540 the number in the tenth place is 5, if its 5 then you have to round up because 1-4 you need to round down, and 5-9 you would have to round up. if you round 16.540 to the nearest tenth would be 17.

Next, if 9.32 the number in the tenth place is 3, since is 5 below you would have to round down which rounds down to 9

So its 17+9 which your answer would be 26.

Answer:

Socialism is another word for a planned economy

Explanation:

true or false

Answer:

bacterial or toxic please

Answer:

hope this helps you

Explanation:

Rejects New Methods: problem with peer review

Identifies sources of errors: reason for peer review

Directs funding: reason for peer review

Takes time: problem with peer review

Sometimes fails: problem with peer review

Answer:

Rejects new methods:  

✔ problem with peer review

Identifies sources of errors:  

✔ reason for peer review

Directs funding:  

✔ reason for peer review

Takes time:  

✔ problem with peer review

Sometimes fails:  

✔ problem with peer review

Explanation:

Answer:

D) particles but the oxygen has a greater mass.

Explanation:

Just took the test and got it right

At STP, one mole of oxygen and one mole of neon contain equal numbers of​ particles but oxygen has greater mass.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

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There are approximately \(2.76 * 10^{24\) ammonia molecules in the given sample.

To calculate the number of ammonia molecules in the sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia \((NH_3)\) can be calculated by adding up the atomic masses of nitrogen (N) and hydrogen (H):

Molar mass of \(NH_3\) = (1 x atomic mass of N) + (3 x atomic mass of H)

              = (1 x 14.01 g/mol) + (3 x 1.01 g/mol)

              = 14.01 g/mol + 3.03 g/mol

              = 17.04 g/mol

Now, we can calculate the number of moles of ammonia in the sample using the formula:

Number of moles = Mass of the sample / Molar mass

Number of moles = 78.25 g / 17.04 g/mol

              ≈ 4.5865 mol (rounded to four decimal places)

Finally, we can use Avogadro's number, which represents the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is approximately \(6.022 * 10^{23\) particles/mol.

Number of ammonia molecules = Number of moles x Avogadro's number

Number of ammonia molecules ≈ 4.5865 mol x (\(6.022 * 10^{23\) molecules/mol)

                           ≈ \(2.76 * 10^{24\) molecules (rounded to two significant figures)

Therefore, the provided sample contains roughly \(2.76 * 10^{24\) ammonia molecules.

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The number of ammonia molecules in the sample is approximately 2.764 x \(10^{24}\) molecules.

To calculate the number of ammonia molecules in a given sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia (NH3) is calculated as follows:

Molar mass of N = 14.01 g/mol

Molar mass of H = 1.01 g/mol

Total molar mass of NH3 = 14.01 g/mol + (3 * 1.01 g/mol) = 17.03 g/mol

Now, we can calculate the number of moles of ammonia in the sample:

Number of moles = Mass of sample / Molar mass of NH3

Number of moles = 78.25 g / 17.03 g/mol = 4.594 moles

Next, we use Avogadro's number, which states that there are 6.022 x \(10^{23}\) molecules in one mole of a substance.

Number of molecules = Number of moles * Avogadro's number

Number of molecules = 4.594 moles * 6.022 x \(10^{23}\) molecules/mol = 2.764 x \(10^{24}\) molecules

Therefore, there are approximately 2.764 x \(10^{24}\) ammonia molecules in the given sample of 78.25 g.

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Answer:

t

Explanation:

the answer is H and O becccause h and o are opposite charges

0.072moles water produced by the reaction of 0.10mol of oxygen.  In reality, it's one of the International System of Units' seven foundation units (SI).

A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created.

The levels at which chemical reactions frequently occur exclude the use of grams, yet utilizing actual numbers of atoms, molecules, or ions would also be unclear. To fill this gap between extremely small and extremely huge numbers, scientists created the mole.

2C\(_8\) H\(_{18}\)+ 25O\(_2\)→ 16CO\(_2\) + 18H\(_2\)O + Heat Energy

0.10mol =oxygen

the mole ratio between oxygen and water is 25:18

moles of water =( 18/25)×0.10=0.072moles

Therefore, 0.072moles water produced by the reaction of 0.10mol of oxygen.

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The reaction is endothermic since the energy level of the products have are higher than that of the reactants.

The activation energy (AE) is the energy difference between the reactants and the transition state.

The change in energy E and the energy difference between the reactants and the products

The data given is as follows:

Reactants: 0 kJ/mol

AE forward 125 kJ/mol

AE reverse: 86 kJ/mol

Products: 39 kJ/mol

The values of ΔE forward and ΔE reverse are as follows:

ΔE forward = (39 - 0) kJ/mol

ΔE forward = +39 kJ/mol

ΔE reverse = (0 - 39) kJ/mol

ΔE reverse =  -39 kJ/mol

3. Given that Ea = 154 kJ/mol and ΔE = 136 kJ/mol

AE reverse = ΔE - AE forward

E = 136 kJ/mol - 154 kJ/mol

E = -18 kJ/mol

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