what is the percent by mass of cdso4 in a 1.0 molal aqueous solution?

In an experiment searching for the photoelectric effect, an incident beam of green light did not eject any electrons from a metal. in order to eject electrons, the experimenter should try blue light.

You need to know that in the photoelectric effect the concept of dualism of light is applied, namely the concept of continuous wave-shaped light. Well, according to Einstein, light consists of packets or light particles (photons).

A photon itself has an energy equal to Planck's constant (h) multiplied by its frequency. In addition, Planck's constant (h) is a constant whose value is always correct. That way, the energy inside the photon will always increase according to its frequency.

The mechanism for the photoelectric effect on a metal starts with light hitting the metal. Then, the light will penetrate the metal material. Where, the photons will meet the electrons that are in the metal.

Learn more about photoelectric at

https://brainly.com/question/26465043

#SPJ4

To obtain a 50% solution from a 30% solution, you need to add 100 mL of pure acid to 150 mL of the 30% solution.

Calculation-

Let's call the volume of the pure acid added to the 30% solution "V".

We know that the volume of the original solution is 150 mL, and that its concentration is 30%. The concentration of the final solution, after adding the pure acid, is 50%.

The concentration of a solution can be expressed as the ratio of the amount of solute to the total volume of the solution. To find the volume of pure acid required, we'll use this expression to create two equations: one for the initial solution, and one for the final solution.

For the initial solution, we have:

(30 g acid) / (100 mL solution) = (30 g acid) / (150 mL solution)

For the final solution, we have:

(50 g acid) / (100 mL solution) = (50 g acid) / (150 mL + V mL)

We can equate the two expressions for the concentration of the solution to find V:

(30 g acid) / (150 mL solution) = (50 g acid) / (150 mL + V mL)

Cross-multiplying and solving for V, we find:

V = 150 mL * (50 g acid) / (30 g acid) - 150 mL

V = 250 mL - 150 mL

V = 100 mL

To know more about concentration, checkout

https://brainly.com/question/17206790

#SPJ4

The absolute uncertainty delivered by the pipette (in ml) reported to the correct number of significant figures will be 0.05 ml.

The absolute uncertainty in this case would be 0.05 x 102 ml, as the volume is guaranteed to be delivered within 5% (0.05 x 102 ml) of the total volume (5.0 x 102 ml).

The number of significant figures for 5.0 x 102 ml is 3, so the absolute uncertainty should also be reported to 3 significant figures, which would be 0.05 x 102 ml = 0.05 ml.

Three key factors contribute to the uncertainty of the pipetted volume, u(V), including repeatability (u(V,rep), pipette calibration (u(V,cal), and temperature variation (u(V), which is the uncertainty owing to the temperature difference from 20 °C) (V,temp).

The estimation of the calibration uncertainty of the pipette is frequently expressed as the estimate of the probable maximum difference of the pipette volume from the nominal volume, expressed as x. (as was done in section 4.1). Typically, the producer provides it without providing any more details regarding its coverage probability or distribution function. In this situation, it is safer to assume that the rectangular distribution is valid and to divide the uncertainty estimate by the square root of three to obtain the standard uncertainty.

Learn more about uncertainty here :

brainly.com/question/13689174

#SPJ4

The statement is false about aldehydes that have a central carbon bound to two other carbons.

All aldehydes possess a double bond between carbon and oxygen, which is termed to as the carbonyl group. Many aldehydes have pleasant aromas, and in principle, they are made from alcohols by the process of dehydrogenation (removal of hydrogen), which is how the word "aldehyde" originated.

Aldehydes are versatile substances that can be utilized to create resins, dyes, organic acids, as well as detergents, soaps, and scents for cologne. Formaldehyde is the aldehyde that is most frequently generated industrially. According to research, cinnamonaldehyde is a natural health molecule that is administered to treat both diarrhoea and the common cold.

Learn more about aldehydes here:

brainly.com/question/29756072

#SPJ4

It is false that while cinnamaldehyde contains more carbon atoms than limonene, it is less polar. Limonene comprises 10 carbons, compared to 9 for cinnamaldehyde.

Foods like sweets and cookies often contain cinnamaldehyde as a flavoring, and it also serves as an odorant in perfumes. Additionally, it has been employed to get rid of mosquitoes and deter mosquito larvae. It is appropriate for sustainable production because it happens naturally.

The chemical cinnamaldehyde is found naturally in the skin of cardamom trees and some other Cinnamomum species, including camphor and cassia. The above trees are the actual source of cardamom, and cinnamaldehyde makes up roughly 90% of the active ingredient of cinnamon bark. As a fungicide, cinnamaldehyde is also employed.

To know more about cinnamaldehyde visit:

https://brainly.com/question/5586116

#SPJ4

0.25 M is the molarity of a solution that contains 3.00 moles of solute and 12.00 liters of solution

A colligative property is a physical characteristic that depends on the quantity of solute supplied rather than the type of solute; for example, the freezing point will be lowered by the same amount of degrees Celsius whether we add 1000 sugar or salt particles to water.

Molarity (M) = moles of solute / liters of solution

M = 3.00 moles / 12.00 liters = 0.25 M

The amount of a solute per unit volume of solution is how much a chemical entity is present in a solution, and this is known as its molar concentration.

"The molarity of products is divided by the molarity of reactants" is the formula for determining an equilibrium constant.

The equilibrium constant is defined as the ratio between the concentrations of the reactant and the product.

Learn more about The amount of a solute per unit volume of solution is how much a chemical entity is present in a solution, and this is known as its molar concentration.

"The molarity of products is divided by the molarity of reactants" is the formula for determining an equilibrium constant.

The equilibrium constant is defined as the ratio between the concentrations of the reactant and the product.

Learn more about molarity here:

https://brainly.com/question/8732513

#SPJ4

The above statement is accurate since at equilibrium there won't be any net flow of molecules through the cell membrane.

A cell is the smallest part of a material that keeps its makeup and characteristics. It is made up of two or maybe more atoms that are joined together by hydrogen bonds. Chemistry is built on molecules. The material symbol and a prefix stating the number of electrons are used to identify molecules.

Molecules are created when atoms come together. Two hydro (H) ions and one oxide (O) atom make up the three atoms that form up a water molecule. Because of this, water is sometimes abbreviated as H2O. There are millions of water molecules in a single drop of liquid.

To know more about molecule visit:

https://brainly.com/question/26933336

#SPJ4

The correct option is B-2.  2 water molecules are produced in the reaction.

According to the given chemical reaction i.e.

2O2 + CH4 —> (x)H2O + CO2 we have to find the number of molecules of water so that all the elements in the reaction get balanced out.

Carbon atoms are equal on both sides so we have to equalize hydrogen atoms first. If we have 4 atoms of hydrogen on the left side it should be equal to the right side.

If we add two molecules of H20 the equation can be balanced.

After balancing we get,

2O2 + CH4 —> 2H2O + CO2

Learn more about molecules,

https://brainly.com/question/475709

The change in kinetic energy (ΔKE) is given by the equation ΔKE = [tex]1/2 * m * v^2[/tex], where m is the mass of the object and v is its change in velocity.

To find the change in kinetic energy, we need to know the initial and final velocity of the object, as well as its mass. If we are given this information, we can use the equation to find the change in kinetic energy. It is important to note that the change in kinetic energy can be positive or negative, depending on the direction of the velocity change. If the velocity of an object increases, its kinetic energy will also increase, and the change in kinetic energy will be positive. On the other hand, if the velocity of an object decreases, its kinetic energy will decrease, and the change in kinetic energy will be negative. In conclusion, to find the change in kinetic energy due to a movement, we need to know the mass of the object, its initial and final velocity, and use the equation ΔKE = [tex]1/2 * m * v^2[/tex].

Learn more about kinetic energy here:

https://brainly.com/question/26472013

#SPJ4

0.87 g of hydrogen is produced by the reaction of 7.80 g of calcium with 1.83 g of water.

To find the amount of hydrogen produced in the reaction, we need to calculate the theoretical yield of hydrogen. This is done by finding the amount of calcium and water that react and finding the amount of hydrogen that is produced from this amount.

From the given information, 7.80 g of calcium reacts with 1.83 g of water. We can use the balanced equation for the reaction to find the amount of hydrogen produced:

Ca + 2H₂O -> Ca(OH)₂ + H2

From this equation, 1 mole of calcium reacts with 2 moles of water to produce 1 mole of hydrogen.

So, the theoretical yield of hydrogen is (1.83 g/mole) x (1 mole/2 moles) = 0.92 g of hydrogen.

Finally, the actual yield of hydrogen is found by multiplying the theoretical yield by the reaction yield, which is 94.4%.

The actual yield of hydrogen = 0.92 g x 94.4% = 0.87 g

Therefore, 0.87 g of hydrogen is produced by the reaction of 7.80 g of calcium with 1.83 g of water.

Learn more about yield:

brainly.com/question/2506978

#SPJ4

The sentence from the given options which best characterizes ferromagnesian silicates are they are black to dark-green silicate minerals containing iron and magnesium.

Ferromagnesium silicate minerals refer to those minerals that have iron and magnesium cations in their composition. Ferromagnesium silicate minerals have relatively high density and produce dark mineral colors. For example, the common ferromagnesian silicate minerals are as follows: Pyroxene.

The dark silicates which are also known as ferromagnesian due to the presence of iron and magnesium in them. Ferromagnesian silicates include olivine, pyroxene, amphibole and biotite. The examples of light-colored silicates includes quartz, muscovite, amphibole and feldspar.

Learn more about Ferromagnesium silicate minerals from the link given below.

https://brainly.com/question/11200427

#SPJ4

In the valence shell of carbon, there are two unpaired electrons in two 2p orbitals. 180 is the angle between those two 2p orbitals.

It produces two sp orbitals, each of which has 50% s and 50% p character, through the hybridization of the 2s orbital and one of the 2p orbitals in this valence shell. The front lobes create a straight line facing away from one another, forming a 180° angle between the two orbitals. This creation reduces the electron repulsion in the valence shell.

One's' orbital and two 'p' orbitals of equivalent energy are combined to create the new hybrid orbital at, a combination of s and p orbitals developed in trigonal symmetry. The three hybrid orbitals remain in the same plane of the valence shell and are at a 180° angle to one another.

To learn more about orbitals please visit -
https://brainly.com/question/12870354
#SPJ4

The most important mineral for making the drywall used for the residential home construction is gypsum.

The soft sulfate mineral gypsum has the chemical formula CaSO4.2H2O and is made up of calcium sulfate dihydrate. It is widely mined, used as fertilizer, and the primary component of numerous plaster, sidewalk or blackboard chalk, and drywall products.

Gypsum may be found as beautiful crystals and as thick layers within shale. Gypsum deposits are never entirely pure. It is typically discovered in deposits that contain a mixture of limestone, sand, shale, anhydrite, and occasionally rock salt.

To know more about gypsum visit :

https://brainly.com/question/18369612

#SPJ4

Palmitate, Laurate, and Arachidate: (2.1, 1.6, and 2.6) nm

Clarification:

The C-C bond measures 1.5 A°, or 0.15 nm.

Tetrahedron bond angle = 109 °C

Trigonometrically, the distance between the first and third carbons in an acyl chain is 0.26 nm, while the distance between the first and second carbons is 0.26/2 = 0.13. (Length extended by each methylene group)

Palmitate's (16 carbon) fully expanded length is therefore equal to 16*0.13 or ~2.1 nm.

Similar to this, the length of a fully expanded laurate (12 carbon) is equal to 12*0.13 and is 1.56 nm or ~1.6nm.

Arachidate (20 carbon) fully expanded length equals 20*0.13 = 2.6 nm.

Learn more about Methylene here:

https://brainly.com/question/13189086

#SPJ4

The 9,10-dihydroanthracene 9 10 alpha beta succinic acid anhydride Melting point is 261-262°C and MW is 276.2861 g/mol.

Anhydrides are readily hydrolyzed at high temperatures in the presence of atmospheric water vapor. To prevent this, prepare a drying tube by inserting a small amount of cotton, some CaCl2, and some more cotton to seal the end. Weight out 0.240 g anthracene and 0.120 g of maleic anhydride. Once all the glassware is assembled together and clamped to the monkey bars, raise the hotplate on the lab jack and begin heating. A 1:1 molar mixture of anthracene and maleic anhydride usually melts at  approximately 210 °C, so if your sample does not melt, very slowly increase the setting of the hotplate until it does melt some. (It may not completely liquefy.) Note that heating the reaction mixture beyond ~260 °C increases your likelihood of obtaining unwanted oxidized side products, so take your time and increase the temperature slowly. Once the temperature is somewhere between 210-260 °C, the reaction will proceed very quickly and should be complete within 15 minutes at most. Watch as the walls of the conical vial become cloudy with crystal formation. After the reaction is complete, lower and remove the hotplate, and allow the conical vial to cool slowly to RT. When it is cool enough to touch, remove the vial and examine the crystals, noting the different layers of crystals that may have formed. If you have distinct layers, the highest layer in the vial should be white and highly crystalline; this should be your product -- 9,10-dihydroanthracene-9,10-α,β-succinic acid anhydride in relatively pure form. The remaining solid in the vial is likely to be yellow-green to dark green in color and is also mostly 9,10-dihydroanthracene-9,10-α,β-succinic acid anhydride.

Learn more about  succinic acid anhydride here:

https://brainly.com/question/28315401

#SPJ4

To dilute the solution to 0.25 M, ml of water must be added to 300 ml of 0.75 M HCl is a. 600 mm.

To dilute the solution from 0.75 M to 0.25 M, we need to decrease the concentration of HCl (hydrochloric acid) in the solution. We can use the formula for dilution of a solution to calculate the volume of water that must be added:

C1 * V1 = C2 * V2

Where:

C1 = initial concentration (0.75 M)

V1 = initial volume (300 ml)

C2 = final concentration (0.25 M)

V2 = final volume (V1 + V added)

Rearranging the equation to solve for V added:

C1 * V1 = C2 * V2

V2 = (C1 * V1 ) / C2

     = 0.75 * 300 / 0.25

     = 900

Since V2 = V1 + V added then

V added = V2 - V1

              = 900 - 300

              = 600

Hence, total water that must be added is a. 600 ml

Learn more about dilute the solution here

https://brainly.com/question/24869996

#SPJ4

Boiling water should be used to pre-warm both the stemless funnel and the filter paper because crystallization can occur at the funnel's opening and clog the lowest opening, preventing the filtrate's flow throughout the whole filtration process.

In the presence of concentrated hydrochloric acid, aniline can also be acetylated using acetic anhydride to produce acetanilide. Add acetic anhydride after dissolving aniline in hydrochloric acid, and mix thoroughly. Add water to the sodium acetate mixture.

Acetanilide is an artificial organic chemical that was first used in medicine in 1886 to treat fever. Soon after, its potency in reducing pain was established, and for decades, it was used instead of aspirin to treat common problems like headaches, menstrual cramps, and rheumatism.

Acetanilide is an artificial organic chemical that was first used in medicine in 1886 to treat fever. Soon after, its potency in reducing pain was established, and for decades, it was used instead of aspirin to treat common problems like headaches, menstrual cramps, and rheumatism. Because of the resonance systems that acetanilide suggests, it is a weak base. The substance serves as the basis for many medicinal capsules, including sulfanilamide, a topical antibacterial and antifungal drug.

Learn more about Acetanilide here:

https://brainly.com/question/14562247

#SPJ4

Answer:

Explanation:

The conversion of CuSO4 into copper metal can be determined by measuring the mass of the reaction mixture before and after the reaction.

The balanced chemical equation for the reaction between CuSO4 and zinc metal is:

CuSO4 + Zn → ZnSO4 + Cu

In this reaction, the number of moles of CuSO4 used is equal to the number of moles of copper produced. If all the CuSO4 is converted into copper metal, the mass of the CuSO4 will decrease by the same amount as the increase in the mass of the copper produced.

By measuring the mass of the reaction mixture before and after the reaction and comparing the masses, we can determine if all the CuSO4 has been converted into copper metal. If the mass of the reaction mixture has increased by the same amount as the mass of the copper produced, we can conclude that all the CuSO4 has been converted into copper metal.

This method is called the Law of Conservation of Mass, which states that the total mass of a system remains constant during a chemical reaction.

Answer:

For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure. That means that, for example, if you double the pressure, you will halve the volume. If you increase the pressure 10 times, the volume will decrease 10 times.

Explanation:

The atoms are the same on both side of the equation. Option A

This law was first stated by Antoine Lavoisier in the late 1700s and is one of the most fundamental laws of chemistry. It is based on the idea that matter cannot be created or destroyed, only transformed from one form to another.

It is used to explain the behavior of chemical reactions, to balance chemical equations, and to understand the behavior of physical systems and the transfer of energy within those systems.

Learn more about conservation of mass:https://brainly.com/question/13383562

#SPJ1

Putting a 2.2g zinc nail into an excess of HCl produces 0.75 L of H2 under standard conditions of temperature and pressure.

Standard temperature & pressure, also, sometimes known as STP, refers to the ideal atmospheric conditions above sea level. The conditions are 0 degrees Celsius & 1 atmosphere, respectively.

The balancing equation states that 1 mole of Zn interacts to yield 1 mole of hydrogen.

While operated under standard temperature and pressure, 1 mole of a gas will occupy 22.4 L.

Hence:

22.4 L of Hydrogen gas are produced when 1 mole of Zinc reacts.

Here, mass of Zinc = 2.2 g

Molar mass of Zn = 65 g

Moles of Zinc = mass of Zinc / molar mass

Moles of Zn = 2.2 / 65

Moles of Zn = 0.0335 mol

Zn interacts with 0.0335 mol to produce, 0.0335 *22.4 L of H2.

= 0.75 L of H2

To know more about standard temperature and pressure visit :                                                  

https://brainly.com/question/14820864

#SPJ4

The complete question is -

Zn + 2HCl → ZnCl2 + H2

At conditions of Standard Temperature and Pressure, determine how many liters of hydrogen gas are produced by placing a zinc nail with a mass of 2.2g into an excess of hydrochloric acid.

A) 0.0015 L B) 0.75 L C) 1.33 L D) 6.42 L

Keep the temperature at least 68 degrees fahrenheit on the thermostat and ensure that pipes are adequately insulated to keep pipes from freezing.

Frosty pipes: If a portion of your piping system is exposed, look to see if any surface frost has accumulated. If it has, your pipe most likely has frozen.

Unusual odours If a drain or valve begins to produce strange or unpleasant odours, there may be a frozen pipe. The only location the odours may escape if your pipes are obstructed by ice is back toward your house.

Lack of water is among the most glaring indications that a pipe has frozen. When you turn on a faucet, when nothing or a very small stream of water is coming out, the pipe most definitely has an ice block in it.

To know more about freezing visit:

https://brainly.com/question/14131507

#SPJ4

A primary carbon is bonded to one other carbon atom(s), while a carbon atom bonded to four other carbon atoms is classified as quaternary.

Quaternary carbon refers to a carbon atom that is bonded to four other carbon atoms. This type of carbon is found in large and complex organic molecules, such as those in pharmaceuticals, fragrances, and natural products. The presence of quaternary carbon atoms in a molecule can greatly impact its properties and reactivity.

Quaternary carbon atoms are often located at the center of a molecule and form the backbone of the molecule, connecting other functional groups. This type of carbon atom is highly resistant to chemical reactions because of its symmetrical arrangement of bonds, making it less reactive than primary, secondary, or tertiary carbon atoms.

The use of quaternary carbon in drug design has become increasingly important in recent years as it is a crucial component in many drug molecules. The presence of quaternary carbon atoms in a molecule can improve its stability and chemical properties, making it more suitable for use in drugs.

To learn more about Quaternary visit here:

brainly.com/question/29098429

#SPJ4

Complete Question: -

A primary carbon is bonded to ____ other carbon atom(s), while a carbon atom bonded to four other carbon atoms is classified as ______

a. The molecular orbital diagram for diatomic [tex]N_2[/tex] and [tex]Co[/tex] attached.

b. The similarities between the two[tex]MO[/tex]diagrams are that both molecules have bonding and anti-bonding orbitals, and both molecules have two electrons in the bonding orbitals. The differences between the two [tex]MO[/tex] diagrams are that [tex]N_2[/tex] has two electrons in the anti-bonding orbital and [tex]Co[/tex] has three electrons in the anti-bonding orbital.

c. [tex]Co[/tex] engages in σ-bonding with metal centres, which is a type of covalent bonding. Diagram attached.

What are diatomic [tex]N_2[/tex] and [tex]Co[/tex] molecular orbits?

Diatomic Nitrogen ([tex]N_2[/tex]) and Diatomic Carbon Monoxide ([tex]Co[/tex]) are two of the most common diatomic molecules. Both molecules consist of two atoms bonded together and are found in nature. [tex]N_2[/tex] is the most abundant molecule in Earth's atmosphere and is essential for life; it is responsible for the blue colour of the sky. [tex]Co[/tex] is a colourless, odourless, and toxic gas that is produced by combustion and is also found in the atmosphere.

To know more about diatomic molecular orbits, check out:

https://brainly.com/question/11531707

#SPJ4

All throughout gastrointestinal tract, enzymes are produced throughout chemical digestion. Bacterial microbes damage various chemical bonds that hold organic stuff connected.

Any of the interactions responsible for the combination of particles into macromolecules, ions, crystals, and many other stability species whose make up the recognizable materials of everyday life are known as chemical reactions. The protonated forms of carbon monoxide, essential for the continuous, and hydrogen cyanide form the stronger bonds in biochemistry.

Chemical bonds, also known as electrical forces, can be categorized into five different groups: ionic, covalently, metallic, van den Waals, among hydrogen bonds. Ions are the building blocks of salts, which are bound through a chemical connection.

To know more about chemical bonds visit:

https://brainly.com/question/15444131

#SPJ4

Based on the supplied description, sulfur hexafluoride is the name of the chemical the with formula SF6.

An artificial, odorless gas called SF6 is utilized in the energy sector to maintain the security and dependability of networks. Because it is highly stable, non-toxic, inflammable, and electronegative, it won't combine with other substances that would change how it behaves or how effective it is.

* When in contact with the skin, sulfur hexafluoride might irritate it and cause a rash or burning sensation. Frostbite can result from direct skin contact, and sulfur hexafluoride can burn the eyes severely and permanently. Sulfur hexafluoride inhalation can irritate the esophagus and nose.

To know more about SF6 visit:

https://brainly.com/question/27929613

#SPJ4

Basic structure The fundamental structure of a protein is only the arrangement of the amino acids in a polypeptide chain.

The folded structure of a protein is determined by the amino acid sequence within it. A protein's fundamental structure is defined as the particular arrangement of amino acids in the protein. A protein's three-dimensional architecture is determined by this sequence.

The term "secondary structure" describes the regular, local structure of the protein backbone that is stabilized by amide group hydrogen bonds that occur both within and outside of individual molecules. Secondary structures typically come in two different forms. The alpha helix is the most common.

to know more about  protein structure here:

brainly.com/question/14652022

#SPJ4

39K would be more abundant because its atomic mass is closest to the average atomic mass of potassium from the periodic table.

The chemical element potassium has the atomic number 19 and the letter K (which stands for kalium in Neo-Latin). It is a silvery-white metal that may be readily sliced with a knife because to its pliability. [6] Within seconds of exposure, potassium metal quickly combines with air oxygen to produce flaky, white potassium peroxide. It was initially separated from potash, which is made up of plant ashes and from which it gets its name. One of the alkali metals in the periodic table is potassium. These metals all have a single valence electron in the outer electron shell, which may be removed with ease to produce an ion with a positive charge (which combines with anions to form salts).Three isotopes of potassium make up natural potassium: potassium-39 (93.26%), potassium-41 (6.73%), and radioactive potassium-40 (approximately 0.01%); numerous synthetic isotopes have also been created. Typically, potassium-39 is 13.5 times more common than potassium-41.

learn more about potassium Refer:brainly.com/question/29105027

#SPJ4

Answer:

C

Explanation:

As we can see here the precipitation spikes in June and the evaporation amount starts to increase. Let's test these 4:

A:

'The lake level will drop because there is more evaporation than precipitation'

As we can see, there is more precipitation than evaporation, so A is not correct.

B:

The lake level will drop because there is more precipitation than evaporation

Evaporation means that water (literally) disappears into thin air, so B would not be correct, as precipitation raises the water level

C:

The lake level will rise because there is more precipitation than evaporation

This is the correct answer, since 1) there is more precipitation than evaporation in June and 2) it makes sense that the lake level will rise with more precipitation.

There we have it! The answer is: C

The endothermic reaction taking place at constant pressure: q = + , ΔH = +, w = +

Endothermic reactions are reactions that absorb heat (heat is removed from the surroundings to the system) Endothermic reactions (endo- is the prefix meaning "into"), in which heat must be transferred to the system by the surroundings.

According to the condition given in the question we have given the reaction.

                             3O₂ (g) → 2O₃ (g)

The reaction is endothermic which means heat is absorbed.

For any endothermic reaction, the sign is POSITIVE.

Now, if we see moles, the number of moles from the reactant side to the product side is decreasing.

If the number of moles is decreasing, then the volume should decrease.

If the volume is decreasing, it indicates that the work is done on the system.

If the work is done on the system then the sign should be always POSITIVE

Now as the heat is absorbed so the sign of q should be POSITIVE

Therefore, the correct option is q = +, ΔH = +, w = +

Your question is incomplete but most probably your full question was:

What are the signs of q, w, ΔH for this endothermic reaction taking place at constant pressure? 3O2 (g) → 2O3 (g)

The correct answer is E.

Learn more about the endothermic reaction at https://brainly.com/question/1160007

#SPJ4