the diagrams above represent two allotropes of solid phosphorus. which of the following correctly identifies the allotrope with the higher melting point and explains why?

The vapour pressure of mentioned solution of sucrose and water is 23.5 mm Hg.

The formula to be used for the calculation is from Raoult's law -

vapour pressure = vapour pressure of water × mole fraction

Number of moles = mass/molar mass

Molar mass water = 18 g/mol

Molar mass sucrose = 342.3 g/mol

Moles of water = 250/18

Moles of water = 13.9

Moles of sucrose = 40/342.3

Moles of sucrose = 0.12

Mole fraction of water = 13.9/(0.12 + 13.9)

Mole fraction of water = 13.9/(14.02)

Mole fraction of water = 0.99

Vapour pressure = 23.76 × 0.99

Vapour pressure = 23.5 mm Hg

The vapor pressure of the solution is 23.5 mm Hg.

Learn more about vapour pressure -

https://brainly.com/question/2693029

#SPJ4

A six-electron group molecule's molecular structure, bond angles, and electron group geometry are trigonal pyramidal, stetrahedral, and 109.5°, respectively.

It is possible for an electron to be free or linked to an atom. There are three main types of particles in an atom: protons, neutrons, and an electron that is bonded to an atom.

To create cross-platform desktop apps using HTML, CSS, and JavaScript, GitHub created the open source package called Electron. By fusing Node and Chromium, Electron achieves this. Apps may be bundled for Linux, Windows, and Mac using a single runtime that supports JavaScript.

To know more about Electrons visit:

https://brainly.com/question/1255220

#SPJ4

The type of intermolecular forces act between a hydrogen chloride molecule and a chloromethane molecule is dipole dipole interaction.

To learn more about dipole- dipole interaction visit:

brainly.com/question/7545068

#SPJ4

Ester group presence is shown by the carbonyl stretching C=O. for ester, which is found to be about 1735 cm-1.

It is an oily layer that forms on water at normal temperature and is a colourless liquid with low solubility in water. In addition to this, the structure of methyl butanoate can also be determined using IR spectra.

What is the purpose of methyl butanoate?

A white liquid with an apple-like odour is methyl butyrate. It serves as a solvent as well as a flavouring and aroma ingredient.

Methyl butyrate is a member of the group of organic substances called fatty acid methyl esters.

"Methyl butanoate" is the name given to the ester produced by the condensation reaction between methanol and butanoic acid.

To know more about IR spectra, visit:

https://brainly.com/question/29039407

#SPJ4

Yes, compounds are pure substances as they are made of molecules that are formed by the union of atoms of different elements through chemical bonding. Hence, molecules are the fundamental unit of compounds. Each compound is made of only one type of molecule.

Answer: 14.34

Explanation:

If the half-life of a radioactive element is 8 years, 6.25% of the original sample would be left after 32 years.

The half-life of a radioactive element is the amount of time it takes for half of the original sample of the element to decay. After 8 years, half of the original sample would have decayed, leaving 50% of the original sample. After 16 years, half of that remaining sample would have decayed, leaving 25% of the original sample.

After 24 years, half of the remaining sample would have decayed, leaving 12.5% of the original sample. After 32 years, half of the remaining sample would have decayed, leaving 6.25% of the original sample.In conclusion, after 32 years, only 6.25% of the original sample would be left.

To know more about decay time, click below:

https://brainly.com/question/16979893

#SPJ4

Mass percentage is a term that represents the concentration, basically mass by mass percentage. It tells about the percentage of a component in a whole component. Therefore, 25.85% is the percentage by mass of sodium chloride in the solution.

Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.

Mathematically,

Percentage of mass = (component’s mass ÷ total mass) x 100%

Total mass = 165.0g+ 54.3g

                 = 219.3g

mass of sodium =56.7 g

Percentage by mass = (56.7 g/  219.3g )×100

                                  = 25.85%

Therefore, 25.85% is the percentage by mass of sodium chloride in the solution.

To learn more about mass percentage, here:

https://brainly.com/question/27429978

#SPJ1

The function which carbohydrates and lipids shared with each other is energy storage. So the option a is correct.

Carbohydrates offer a ready source of fuel to your cells, while lipids can store energy in your fat tissue for later use.. Carbohydrates and lipids both contain carbon (C), hydrogen (H), and oxygen (O).

Carbohydrates are animals main source of energy.

The most common lipids in animals are fats that are present in specific cells as an essential cell part and supply energy for cellular activities. The cell membranes  hormones and vitamins are made up of lipids.

Your question is incomplete most probably your full question was

Students are comparing the functions of carbohydrates and lipids. Which cellular function would be shared between carbohydrates and lipids?

a) energy storage

b) protein formation

c) energy consumption

To look more about carbohydrates click here

brainly.com/question/14614055

#SPJ4

The retention times of the compounds change if the solvent composition was changed from 55 vol% acetone and 45 vol% water to 85 vol% acetone and 15 vol% water is decreases..

The acetone and the water mixture is polar . this makes the example of reversed phase reaction. Acetone is the polar molecule and the water is also o polar molecule and there mixture is polar mixture.

For the polar solutes which are separated by the hydrophilic interaction chromatography. the the solvent composition changed from the 55 vol% of the acetone and the 45 vol% of the water to the 85 vol% of the acetone and the 15 vol% of the water , the retention times decreases.

To learn more about retention times here

https://brainly.com/question/14190650

#SPJ4

A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another.

When one element replaces another in a compound, it is known as a single replacement reaction. A + BC → B + AC is a good representation of this kind of reaction. When two ionic compounds exchange ions and create two new ionic compounds, this is known as a double replacement reaction.

Replacement is the reaction that occurs when one element swaps places with another in a compound or when two components in two separate compounds switch places.

Learn more about replacement reaction here:

https://brainly.com/question/15995721

#SPJ4

The galvanic or voltaic cell has a cell potential of 1.1 V.

Using the Nernst equation: Under unusual circumstances, the cell potential of an electrochemical cell can be determined using the Nernst equation.

Now that we are aware of that;

E= 0.0592/nlog - E° Q E° = 1.1 - 0.0592/2 log(1/1)

E° = 1.1 V

Consequently, the voltaic or galvanic cell's cell potential is 1.1 V.

electrode: the metal strip on which the reaction occurs.

An electrode where oxidation takes place is an anode.

an electrode where reduction takes place is a cathode.

A voltaic cell's salt bridge is the chamber of electrolytes required to complete the circuit.

To learn more about electrochemical please click on below link

https://brainly.com/question/12034258

#SPJ4

Mass percentage is a term that represents the concentration, basically mass by mass percentage. It tells about the percentage of a component in a whole component. Thus, the mass percentage of water in given compound is 27.9%.

Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.

Hydrated compound + Δ[tex]\rightarrow[/tex] anhydrate compound +water

mass of hydrate compound =mass of anhydrate compound + mass of water

mass of hydrate compound=37.25 g

mass of anhydrate compound=26.81 g

37.25 g =26.81 g+ mass of water

mass of water=10.4g

Percentage of mass of water = (component’s mass ÷ total mass) x 100%

Percentage of mass of water = (10.4g ÷37.25 g) x 100%

                                                 =27.9%

Thus, the mass percentage of water in given compound is 27.9%.

To learn more about mass percentage, here:

https://brainly.com/question/27429978

#SPJ1

The specific heat capacity of the metal is 0.3818.

Heat (released) = Heat (absorbed)

As we know,

Q = mcΔT = m × c × [T (final) - T (initial)]

∴ -[m₁ × c₁ × {T (final) - T₁}] = [m₂ × c₂ × {T (final) - T₂}]

Where,

q = heat absorbed or released

m₁ = mass of metal = 50.0 g

m₂ = mass of water = 50.0 g

T (final) = final temperature = 60° C

T₁ = temperature of metal = 500° C

T₂ = temperature of water = 20° C

c₁ = specific heat of metal = ?

c₂ = specific heat of water = 4.2 j/g°c

Now substitute the values in eq (1) and solve for c₁,

-[50 × c₁ × {60 - 500}] = [50 × 4.2 × {60 - 20}]

⇒ -[50 × c₁ × -440] = [50 × 4.2 × 40]

⇒ 22000 c₁ = 8400

⇒ c₁ = 8400/22000

⇒ c₁ = 0.3818

Hence, specific heat capacity of the metal is 0.3818.

Learn more about specific heat from the link given below.

https://brainly.com/question/20308923

#SPJ4

Solutions of these two compounds, nano3 and co(no3)2, behave differently when aqueous ammonia is added because the hydroxide salts formed have different solubility in water.

What is a precipitation reaction?

The definition of "precipitation reaction" is "a chemical process occurring in an aqueous solution where two ionic bonds join, producing an insoluble salt." Precipitates are insoluble salts that are the result of precipitation processes.

Ammonium hydroxide, a chemical that can react with ionic compounds, is created when aqueous ammonia is present. Ammonium hydroxide reactivity with the other compounds behave differently due to their precipitation rate.

Therefore solutions of these two compounds, nano3 and co(no3)2, behave differently when aqueous ammonia is added because the hydroxide salts formed have different solubility in water.

To know more about precipitation reaction from the given link

https://brainly.com/question/13016165

#SPJ4

According to the chemical formula (C5H12O),0.0723 moles of hydrogen using ratio and proportion.The tert-Butyl methyl ether molecule consists of 12 H atom(s), 5 Carbon atom(s) and 1 Oxygen a total of 18 atom(s).

Since the 1980s, flammable methyl tert-butyl ether (MTBE) has been added as a fuel additive to unleaded gasoline. The pollution-reducing compound MTBE raises the octane and oxygen content of gasoline.

Methyl tertiary-butyl ether (MTBE), also called tert-butyl methyl ether and methyl tert-butyl ether, is an organic molecule having the chemical formula (CH3)3COCH3. MTBE is a colorless, combustible liquid that is only sporadically soluble in water.

Learn more about gasoline here:

https://brainly.com/question/2166121

#SPJ4

After four years, only one-sixteenth (1/16) of the original radioactive substance will remain unchanged.

What is an atom?

This is because each half-life period causes the amount of the substance to decrease by half. After one year, half of the substance will remain, and after two years, one quarter (1/4) of the original substance will remain. After three years, one eighth (1/8) of the original substance will remain, and after four years, one sixteenth (1/16) of the original substance will remain unchanged.

To know more about atoms, click the link given below:

https://brainly.com/question/13518322

#SPJ4

When 1 mole of benzene burns in abundant oxygen under typical thermodynamic circumstances, heat is released that is equal to -781.0 Kcal mol^-1.

A subfield of physics known as thermodynamics studies the relationship between energy, entropy, the physical characteristics of matter and radiation, as well as heat, work, and temperature. With an atomic number of 8 and the chemical symbol O, oxygen is the eighth chemical element. It belongs to the chalcogen group in the periodic table, is a very reactive nonmetal, and is an oxidizing agent that easily forms oxides with most elements as well as with other compounds like benzene. With an atomic number of 8 and the chemical symbol O, oxygen is the eighth chemical element. The periodic table classifies it as a part of the chalcogen group.

Learn more about benzene here

https://brainly.com/question/14525517

#SPJ4

Straight-chain alkane undecane has 11 Carbon atoms in it.

10 carbon atoms and 22 hydrogen atoms are covalently linked together to form the hydrocarbon decane. Decane is a member of the enormous organic family known as alkanes. The only atoms in the hydrocarbon molecules of the alkane family are carbon and hydrogen.

Consequently, the alkyne with 16 hydrogen atoms has the formula C9H16 C 9 H 16. Alkenes are hydrocarbons with a double bond connecting the carbon atoms. Their usual formula is CnH2n, or C n H 2 n. 2n = 44, where n is the number of hydrogen atoms.

Learn more about Decane here:

brainly.com/question/16770563

#SPJ4

The species is produced at the cathode

2Na + 2e⁻ → 2Na followed by 2Na  + H₂O → Na⁺ + OH⁻ + H₂

The species is produced at the anode

2 Br⁻ → Br₂ + 2e⁻

The negative or reducing electrode, known as the anode, undergoes electrochemical reaction when it oxidizes and releases electrons to the external circuit. During the electrochemical reaction, the cathode, also referred to as the positive or oxidizing electrode, is reduced after receiving electrons from the external circuit.

Balanced reaction:

2Na + 2Br → Br₂ + Na₂⁺ + 2OH⁻

At cathode:

2Na + 2e⁻ → 2Na followed by 2Na  + H₂O → Na⁺ + OH⁻ + H₂

At anode:

2 Br⁻ → Br₂ + 2e⁻

To know more about cathode visit:

https://brainly.com/question/13074008

#SPJ1

The boiling point of alcohol will vary between Texas and Denver due to differences in air pressure.

The four types of alcohol are rubbing, isopropyl, denatured, and ethyl. The most popular and well-known variety is ethanol, also referred to as grain alcohol or ethanol. Since it is created by the fermentation of glucose and yeast, it is present in beer, wine, and liquor.

When we talk about alcohol, we most often mean the alcohol found in beer, beer, and spirits. Due to the alcohol in such drinks, you become intoxicated. The type of alcohol contained in drinks is known as ethanol (ethyl alcohol). Yeast ferments the carbohydrates found in grains, fruit, and veggies to create

To know more about alcohol visit:

https://brainly.com/question/4698220

#SPJ4

If the addition of bromine to trans-cinnamic acid proceeds purely by the expected anti addition the product will be erythro racemic mixture of the 2R,3S/2S,3R enantiomers.

What is the meaning of racemic mixture?

A mixture is known as racemic mixture, when that mixture contains equal quantities of two enantiomers, or substances that have dissymmetric molecular structures that are mirror images of one another. A racemic mixture is also known as racemate.

Hence, addition of bromine to trans-cinnamic acid results in the formation of racemic mixture with two enantiomers.

Learn more about Racemic mixture from the link given below.

https://brainly.com/question/29561619

#SPJ4

a melting point test as performed on the alum sample. It confirms the identity of the compound and measures its purity. Impurities decrease the melting point and gives a bigger range of melting point.

The point at which a material transforms from a solid to a liquid is commonly referred to as the melting point. The melting point of a liquid is the temperature at which, under atmospheric pressure, a solid transforms into a liquid. At this time, both the liquid and solid phases are in equilibrium. A substance's melting point is the temperature at which, under normal pressure, it transforms from a solid state to a liquid state. 0 degrees Celsius applies to water (32 Fahrenheit, 273,15 Kelvin). Alum is an inorganic chemical compound that often consists of sulfates, aluminum or other metals, and water molecules. Alum is essentially hydrated aluminum double sulfate salt.

Learn more about melting point here:

https://brainly.com/question/29578567

#SPJ4

The half-life of the isotope is 21 years when the decay rate for a radioactive isotope is 3.3 percent per year.

It is given that in the isotope the decay rate for a radioactive isotope is 3.3 percent per year, then the half-life of the isotope can be computed by the following formula,

Half-Life formula:

N(t) = No e^-λt............(1)

Where,

N(t) is the amount of isotope at time 't'

No is the Initial Amount of isotope.

λ is the decay constant

t is time in years. (here).

Then, N(t) = No/2 at half-life.......(2)

λ = 3.3/100

λ = 0.033

Substituting (2) in (1) we get,

No/2 = No e^-0.0033t

1/2 = No e^-0.0033t

By taking ln on either sides, we get

ln (1/2) = ln(e^-0.0033t)

ln(1/2) = -0.033t ln(e)

ln(1/2) = -0.033t

t = -1/0.033 ln(1/2)

t = +0.693147181/0.033

t = 21.0125672

t = 21 years

The half-life of the isotope is 21 years.

To know more about the decay rate, click below:

https://brainly.com/question/25537936

#SPJ4

The rocks that glaciers transport at their base scratch the underlying surface and create striations and deeper gouge marks that we call glacial grooves.

What is glaciers ?

The word "glacial" is also applied to chemical compounds that have a propensity to crystallize into ice at temperatures just below room temperature. Pure organic acids that are present in their pure and anhydrous form are where this type of phenomenon that results in the formation of ice-like crystals occurs.

What is glacial grooves?

Rock and sediment fragments are mixed into the ice as glaciers flow over land. The sole of the glacier, which is where the inclusions are, resembles a rough sandpaper that can scratch bedrock as a result of these inclusions.

Therefore, rocks that glaciers transport at their base scratch the underlying surface and create striations and deeper gouge marks that we call glacial grooves.

Learn more about glacial grooves from the given link.

https://brainly.com/question/9143309

#SPJ4

As the ice and water mixture in the given situation becomes a uniform temperature of 0°c, the amount of ice that has melted is 75.4g.

Different substances require different amounts of heat to cause a temperature change. The specific heat capacity of a substance refers to the quantity of heat required to increase the temperature of a unit quantity of the substance by one degree. Hence, the amount of heat added Q is given by:

Q = w x Cp x ∆T

where w is the weight of substance, Cp is specific heat of material, and ∆T is the change in temperature.

According to given data,

w = 100gm

Cp = 4.186J/g°c

∆T = -60

Hence, the amount of heat needed to melt ice is:

Q =100.0g (4.186J/g°c) (-60°C) = -25116J

When the mixture is at a uniform temperature, heat lost by water which is gained by ice is given by

Q = m*ΔH

Where ΔH is the change in enthalpy.

Hence,

-25116J = m*333J/g

m = -75.4g

Therefore, mass of ice is 75.4 g.

Learn more about Specific heat capacity:

https://brainly.com/question/21406849

#SPJ4

As more ions are added, which decreases reading accuracy, if the titrated solution is dark in color at the conclusion of the titration, the molar concentration or molarity of HCl will be higher than the true value.

What does the term "titration" mean?

Chemical qualitative analysis employs the titration method, commonly referred to as titrimetry, to determine the concentration of a particular analyte in a mixture. Titration is a crucial analytical chemistry technique also referred to as volumetric analysis.

The titration principle is what?

The basic concept of the titration is as follows: The next step is to provide a titrant or standard solution to the sample to be tested.

To know more about molarity visit:

https://brainly.com/question/2817451

#SPJ4

The amount of Gallium that can be deposited is 0.450 g.

Obtain the equation of gallium (III) to gallium that occurs in the electrolysis.

Ga³⁺ + 3 e⁻ → Ga

The relations important for the calculations are:

1 minute = 60 second

1 Ampere = 1 Coulomb / second

The charge of 1 mole of electrons is 96,468 Coulomb (Faraday's constant)

1 mole of gallium is deposited when 3 moles of electrons circulate.

The molar mass of gallium = 69.72 g/mol

Obtain the mass of gallium deposited from a Ga(III) solution using a current of 0.390 A that flows for 80.0 min

80 min × 60s/1min × 0.390c/s × 1 mole⁻/96,468c × 1 mol Ga/3 mole⁻ × 69.72g/1mol Ga = 0.450 g

Hence the mass of the Ga deposited is 0.450 g.

Learn more about mass from the link given below.

https://brainly.com/question/19866201

#SPJ4

Thiocyanate is a frequently utilized ligand because it offers valuable precursors for a variety of coordination complexes and has multiple bonding mechanisms to one or more transition metal ions.

Thiocyanate typically forms terminal bonds with first row transition metals via the nitrogen.

To know more about Thiocyanate complex please click here ; https://brainly.com/question/14970414

#SPJ4

Answer:

Coefficient of 1 for all except Cl2, which has a coefficient of 3.

Explanation:

The left side of the equation has 6 chlorine atoms, so the right side also needs 6 chlorine atoms.