Your team is assigned the Funky Mix. Your unknown has a boiling range of 121-124 oC. You take an IR of your compound and see a carbonyl peak at 1730 cm -1. What is the most likely identity of your unknown

Answer:

The mass of sodium hydroxide will result in the same mass of sodium chloride.

The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water

The mass of hydrochloric acid will result in the same mass of sodium chloride.

The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water

Explanation:

Answer:

The mass of sodium hydroxide will result in the same mass of sodium chloride.

The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water

The mass of hydrochloric acid will result in the same mass of sodium chloride.

The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water

Explanation:

The value of [ H3O^{+}] in a 0.010 M HOBr solution  is 5.0 * 10^{−7} M

To calculate the value of [H3O^+] in a 0.010 M HOBr solution, we first need to determine the concentration of  H3O^{+} ions that are produced by the dissociation of HOBr.
The balanced chemical equation for the dissociation of HOBr is: HOBr + H_{2}O ⇌ H_{3}O^{+} + OBr^{-}.
The equilibrium constant expression for this reaction is:
Ka =\frac{ [H3O^{+}][OBr^{-}]}{[HOBr] }
We are given that Ka = 2.5 * 10^{−9}, and the initial concentration of HOBr is 0.010 M. We can assume that the dissociation of HOBr is small, so the concentration of  H3O^{+} ions produced is negligible compared to the initial concentration of HOBr. Therefore, we can approximate the concentration of H3O^{+} ions produced as x, and the concentration of OBr- ions as also x. The concentration of HOBr remaining will be (0.010 - x).
Substituting these values into the equilibrium constant expression and solving for x, we get:
2.5 * 10^{−9} =\frac{ (x)(x)}{(0.010 - x) }
x = 5.0 * 10^{−7} M
Therefore, the value of [ H3O^{+}] in a 0.010 M HOBr solution is e. 5.0 * 10^{−7} M .

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Mass of 0.75 moles of \(C_{2}H_{6}\) is 22.5 g. 0.75 moles means 3/4 of one mole, the mass of 0.75 mole of ethane will be equal to 3/4 mass of one mole of ethane.

\(C_{2}H_{6}\)  is the chemical formula for ethane. It is made up of two molecules of Carbon and six molecules of Hydrogen.

Mass of 1 mole of ethane, \(C_{2}H_{6}\) is equal to sum of the mass of two molecules of carbon and the mass of six molecules of hydrogen.

mass of 1 mole of \(C_{2}H_{6}\) = 2(12) + 6(1) = 30 g

where mass of carbon is 12 g

and mass of hydrogen is 1 g

mass of 0.75 mole of \(C_{2}H_{6}\) = 0.75 (30)

                                             = 22.5 g

Hence, the mass of 0.75 moles of \(C_{2}H_{6}\) is 22.5 g.

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explanation

the chemical formula of water is H²O.

Hydrogen+Oxygen=water

answer

Hydrogen-Water-Hydrogen

Answer:

the answer key is

for atomic but you find it from the periodic table

porotons = atomic number

neutrons = atomic mass - protons number

electrons number = proton number

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Answer: Try mass that’s the best guess I can give off the top of my head

Explanation: An atom is the smallest unit of matter that retains all of the chemical properties of an element. Atoms come together which forms molecules. These molecules interact to form solids, gases, or liquids.

Answer:

a. Urmila always goes to the temple, doesn't she?

b. Was the baby playing with the doll?

c. When will Peter start a business?

d. They have not finished the work yet.

e. She told me that her brother knows me.

f. Sita was married by Ram.

Explanation:

A. In grammar, a question tag is a very short clause at the end of a statement which changes the statement into a question. For example, in 'She said half price, didn't she?' , the words 'didn't she' are a question tag.

B. Interrogative questions/sentences often have to get a yes/no answer.

C. The "next year" will be the answer to that question. U need to ask when.

D. The have not done the work yet, therefore the answer would change from "not finish" to "have not finished"

E. Indirect speech is speech which tells you what someone said. It's like the game "telephone" indirect speech is what you tell someone else, what another person said, or what someone else tells you what another person said.

F. Passive voice means that a subject is a recipient of a verb's action.

A. build proteins

Explanation:

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins

Answer:

Most Medicare Advantage plans also fold in prescription drug coverage. Not all of thesef, g, and h. If you don't know the answer to all parts then just tell me the answer to the parts you know, and if you

The best way to clean any computer component or device is to follow the manufacturer's instructions in your user manual.

Always power off the system first.

Always use anti-static wristband or other professional grounding devices.

Never work on carpeted surfaces.

Please help me with this question, I already did part a and part b. Can someone please tell me how to do part c, d, e,

The number of units per volume, area, or length: as. a: a substance's mass per unit volume is 85.12 g.

Therefore,

The density of tin in g ml =  6.037 g/ml.

so  the mass of a piece of tin with a volume of 14.1 mL.

= 6.037 x 14.1 = 85.12 g.

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Answer:

1s2 2s2 2p6 3s2 3p6 3d2 4s2

Explanation:

One other fact that we can keep in mind as to why the advice proposed by the firefighter is correct is that hotter air rises, while cool air will sink.

The firefighter in question offered the advice to exit a burning building by remaining close to the floor. One additional benefit of this proposed method is to avoid the effects of the hot air when attempting to exit, which can be life-saving given the effects that increased heat may have on a person.

Heat can have a variety of negative effects on a person, which include:

and many other life-threatening conditions if the heat is extreme.

The benefit of staying close to the floor in order to avoid the heat may be very small in such extreme conditions, however, even a few degrees of difference can be enough to get out safely at times.

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The options which correctly describe entropy are- Entropy is a measure of the energy dispersal of a system, The greater the freedom of motion of particles in a system, the greater the entropy of the system and Any process that causes an increase in the entropy of a system will be spontaneous.

Entropy is a measure of the disorder or randomness of a system, and it is often associated with the amount of energy that is unavailable to do work. The symbol for entropy is S. It is not another term for kinetic energy or energy of movement.

The second law of thermodynamics says that the total entropy of a system either increases or will remain constant in any spontaneous process. It never decreases.

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Answer:

3,46 atm

Explanation:

Tenemos;

P1 =?

T1 = 100 + 273 = 373 K

V1 = 40 litros

P2 = 6 atmósferas

T2 = 50 + 273 = 323 K

V2 = 20 litros

Desde;

P1V1 / T1 = P2V2 / T2

P1V1T2 = P2V2T1

P1 = P2V2T1 / V1T2

P1 = 6 * 20 * 373/40 * 323

P1 = 44760/12920

P1 = 3,46 atm

At −92°C, the vapour pressure of the substance X is 5.5 atm

According to Clausius Clapeyron equation,

ln (P₂/P₁) = -ΔHvap /R (1/T₂ - 1/T₁) -------> (i)

Here,

P₁ = 1 atm

T₁ = 90°C = (90 +273)K = 363K

T₂= -92°C = (-92+ 273)K = 181 K

ΔHvap = 17 KJ/mol

R = 8.314 J/K/mol

To find: P₂

Substituting the above given values in equation (i) we get,

ln (P₂/P₁) = -ΔHvap /R (1/T₂ - 1/T₁)

ln(P₂/ 1 atm)= -17 KJmol⁻¹ /  8.314 JK⁻¹mol⁻¹ ( 1/181K -1/363K)

ln P₂ = -17 KJmol⁻¹ /  0.008314 KJK⁻¹mol⁻¹ ( 0.0028K)

2.303 log (P₂) = - 730240.55 atm

log (P₂) = - 730240.55 atm/ 2.303

log (P₂) = -317082.306 atm

P₂ = antilog (-317082.306)

P₂  = 5.5 atm (upto two significant figures)

Thus, the vapour pressure of X at −92°C is 5.5 atm.

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Complete ionic equations and net ionic equations differ from chemical equations in terms of their level of detail and the specific ions involved.

Chemical equations provide a simplified representation of a chemical reaction by showing the reactants and products involved. They do not provide information about the individual ions present in the reaction. On the other hand, complete ionic equations offer a more detailed perspective by explicitly representing all the aqueous species as their separate ions.

This means that soluble ionic compounds are shown as their constituent ions. Complete ionic equations help in understanding the formation of new compounds and the exchange of ions during a reaction. Net ionic equations take the concept of complete ionic equations a step further by eliminating spectator ions.

Spectator ions are ions that do not participate in the chemical reaction and remain unchanged throughout the reaction. In a net ionic equation, these spectator ions are excluded, focusing only on the ions that undergo a chemical change.

By removing the spectator ions, net ionic equations provide a clearer picture of the actual chemical transformation occurring in the reaction. They help identify the key ions involved and allow for a more concise representation of the essential chemistry taking place.

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Sulfur dioxide (SO2) is polar in nature and the electronegativity difference between sulfur and oxygen atoms makes it a polar molecule.

Sulfur dioxide is the chemical compound with the formula SO2 and it is a toxic gas that is responsible for the odor of burnt matches.

SO2 has a bent shape due to the presence of unbonded electrons on the sulfur and oxygen atoms.

Solid sulfur dioxide is a polar molecular solid because net dipole moment is non zero and constituent particles are molecules and the electronegativity of sulfur is 2.5 and that of oxygen is 3.5.

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In making the 3,5-dinitrobenzoate ester derivative, Alcohol could be present besides the ester

Esters are chemical compounds that are made by combining an oxoacid and a hydroxyl compound, like alcohol or phenol, in a reaction. Esters are universal. The majority of naturally occurring fats and oils are glycerol's fatty acid esters.

what compounds could be present besides the ester depends on the quantities used and the starting materials. When 3,5 dinitrobenzoate ester is made with acid chloride and alcohol, excessive alcohol is typically used. The product ester and this excess alcohol remain in the reaction solution. During the work-up procedure, the excess alcohol can be easily removed from the product mixture by washing the reaction mixture with excess water.

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a. hcl, hno3, hf, hclo4 b. h2so4  list contains only strong acids.

Chloric acid, hydrochloric acid, hydrochloric acid, hydroiodic acid, nitric acid, perchloric acid, and sulfuric acid are the 7 main acids. These are strong acids since they can completely dissociate in water. A strong acid is described as an acetone that completely disintegrates when added to water. Because the hydrochloric acid inside the preceding example donates every one of its protons to the remedy and totally dissolves, it is classified as a strong acid.

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The empirical formula of the oxide is Cu₂O

We'll begin obtaining the mass of the oxide, copper and oxygen. This is shown below:

Mass of oxide = (Mass of container + copper oxide) - (Mass of container

Mass of oxide = 26.97 - 25.61

Mass of oxide = 1.36 g

Mass of copper = (Mass of container + copper) - (Mass of container)

Mass of copper = 26.82 - 25.61

Mass of copper = 1.21 g

Mass of oxygen = (Mass of oxide) - (Mass of copper)

Mass of oxygen = 1.36 - 1.21

Mass of oxygen = 0.15 g

Finally, we shall determine the empirical formula of the oxide. Details below

Divide by their molar mass

Cu = 1.21 / 63.55 = 0.0190

O = 0.15 / 16 = 0.009375

Divide by the smallest

Cu = 0.0190 / 0.009375 = 2

O = 0.009375 / 0.009375 = 1

Thus, the empirical formula of the oxide is Cu₂O

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Complete question:

An oxide of copper was reduced to form copper metal by reaction with hydrogen. Use the data in the table to find the empirical formula of this oxide of copper.

Table reads as follows:

Container – 25.61g

Container + copper oxide (before reaction) – 26.97g,

Container + copper (after reaction) – 26.82g.

Answer: D.)Topsoil

Explanation: Have agriculture

Yes, it is possible to calculate the number of sand particles in the truck by multiplying the number of sand moles by Avogadro's number (6.022 x 1023 particles/mol).

The law that similar volumes of gases, regardless of their chemical make-up and physical features, contain the same number of molecules at the same temperature and pressure was first discovered in 1811 by Italian chemist Amadeo Avogadro (1776–1856). Avogadro's number, or 6.023 x 1023, is the answer.

Avogadro's number, or more precisely, Avogadro's constant, refers to the quantity of particles in a mole. The majority of calculations only require three (6.02 × 1023) or a maximum of four (6.022 x 1023) meaningful values for Avogadro's number.

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Taking into account the definition of calorimetry, sensible heat and latent heat,  the amount of heat required is 37.88 kJ.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

Latent heat is defined as the energy required by a quantity of substance to change state.

When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.

First of all, you should know that the freezing point of water is 0°C. That is, at 0°C, water freezes and turns into ice.

So, you must lower the temperature from 25.60°C (in liquid state) to 0°C, in order to supply heat without changing state (sensible heat).

The amount of heat a body receives or transmits is determined by:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing:

Q1= 4.184 \(\frac{J}{gC}\)× 185.5 g× (- 25.6 °C)

Solving:

Q1= -19,868.98 J

The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to

Q = m×L

where L is called the latent heat of the substance and depends on the type of phase change.

In this case, you know:

n= 185.5 grams× \(\frac{1mol}{18 grams}\)= 10.30 moles, where 18 \(\frac{g}{mol}\) is the molar mass of water, that is, the amount of mass that a substance contains in one mole.

ΔHfus= 6.01 \(\frac{kJ}{mol}\)

Replacing:

Q2= 10.30 moles×6.01 \(\frac{kJ}{mol}\)

Solving:

Q2=61.903 kJ= 61,903 J

Similar to sensible heat previously calculated, you know:

Replacing:

Q3= 2.092 \(\frac{J}{gC}\) × 185.5 g× (-10.70) °C

Solving:

Q3= -4,152.3062 J

The total heat required is calculated as:  

Total heat required= Q1 + Q2 +Q3

Total heat required=-19,868.98 J + 61,903 J -4,152.3062 J

Total heat required= 37,881.7138 J= 37.8817138 kJ= 37.88 kJ

In summary, the amount of heat required is 37.88 kJ.

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Answer:

All three are examples of colloids. Suspensions may scatter light, but if the number of suspended particles is sufficiently large, the suspension may simply be opaque and the light scattering will not occur.

Titration is the correct answer.

What is titration?

Titration, commonly referred to as titrimetry, is a typical quantitative chemical analysis method used in laboratories to ascertain the unidentified quantity of an analyte (Mednick and Kirschner, 2010). Titration is frequently referred to as volumetric analysis because it relies heavily on volume measurements. To determine concentration, a solution of the analyte or titrant reacts with a known concentration and volume of the titrant. Titrations come in a variety of forms with various protocols and objectives. Redox and acid-base titrations are the two most typical types of qualitative titrations.

Acid-base titrations rely on the solution-based neutralisation of an acid and a base. The acid-base indicator changes colour to signal when the titration has reached its endpoint.

Titrations carried out in the gas phase are known as "gas phase titrations," and they are specifically used to identify reactive species through their reaction with an excess of a titrant gas. In one typical gas phase titration, nitrogen oxide and gaseous ozone are titrated in accordance with the reaction

The amount of analyte in the initial sample is determined by quantifying the remaining titrant and product after the reaction has finished (for example, using FT-IR).

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Solution of an unknown concentration that has another solution slowly added to it _____________.

The true structure of a resonance hybrid is determined by the most stable resonance contributor. Equivalent resonance forms contribute equally to the overall structure of the resonance hybrid.

In a resonance hybrid, molecules or ions can have multiple resonance structures, which are different representations of electron distribution. These resonance structures are connected by double-headed arrows to indicate the delocalization of electrons. The true structure of a resonance hybrid is not any single resonance structure but a combination of all resonance contributors.

The stability of a resonance contributor depends on factors such as formal charges, electronegativity, and resonance energy. The most stable resonance contributor, also known as the major contributor, has the lowest energy and contributes the most to the overall structure of the resonance hybrid.

Equivalent resonance forms have the same energy and contribute equally to the resonance hybrid. They can be interconverted through resonance, where electrons are delocalized over multiple atoms. This delocalization of electrons enhances the stability of the system.

By considering the most stable resonance contributor and the equal contribution of equivalent resonance forms, we can determine the true structure of a resonance hybrid, which represents the actual electron distribution in the molecule or ion.

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The statement information about earth and the sun direction of earth's rotation axis best explains the pattern of daytime and night-time on earth is " earth must complete one rotation on its axis every 24 hours".

The sun was composed of incredibly hot gases, as well as then it heats as well as illuminates the entire solar system.

The earth was referred to as a "one-of-a-kind" planet since that is the only one on the planet with ideal circumstances for life.

Day though night are caused by the Earth's diurnal revolution. From west to east, the earth rotates on its axis for around 24 hours. As a result, the sun appears to rotate from east to west, resulting in sunset and sunrise. except for polar is, which remains stationary in the north polar sky along the earth's axis, all those other stars move from east to west.

Therefore, the correct answer will be C.

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Answer:

THE ANSWER IS (C.)

Explanation:

Answer:

Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate

Explanation:

. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white

The phosphate concentration of the unknown sample is 0.002 M

Beer's law, the quantity of power absorbed or transmitted by using a solution is proportional to the solution's molar absorptivity and the awareness of the solute. In easy terms, a greater focused answer absorbs greater light than a more dilute solution does.

C = εa/b

  =  0.285 / 137.2

   = 0.002 M

A sequence of fashionable solutions containing a purple dye was made by diluting an inventory answer and then measuring the percent transmittance of every answer at 505 nm (greenish blue). This wavelength became decided on with the aid of examining its absorption spectrum.

Lambert's law of absorption states that equal elements inside the equal absorbing medium soak up identical fractions of the mild that enters them. If in traversing a path of duration dx the intensity is decreased.

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