A gas’s pressure is 765 mm Hg at 23°C. At what temperature in celsius will the pressure be 560 mm Hg?

KOH(aq)]=0.150⋅mol⋅L−1. so from this we can move further and calculate;

A stoichiometric equation, such as

HCl(aq)+KOH(aq) → KCl(aq)+H2O(l), and comparable amounts of HCl are required (aq).

Given that concentration equals molecules of reagent divided by the volume of solution,

we obtain:

volume of solution concentration=24.1 mL10-3 mL1 0.187 mol mL=0 .0045 mol

Due to the 1:1 molar equivalence, this amount of acid was present in 184mL of the base.

As a result,

[KOH]=4.5103mol/18.4103L

          =0.244molL1.

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Answer: Both A and C

Explanation:

A combinations of reactants to form only water and their respective salts will be Diluted acids and metal hydroxides, and Dilutions of acids and metal oxides. This is further explained below.

Generally, reactants are simply defined as materials that enters and is changed during a chemical reaction.

In conclusion, Dilutions of acids and metal oxides combine to form only water and their respective salts.

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Answer:

91

Explanation:

The most ideal behavior is exhibited by an ideal gas, which follows the assumptions of the kinetic molecular theory, the correct answer is D) He.

The correct answer is D) He. According to the kinetic molecular theory, ideal gases have particles that are point masses with no volume and do not interact with each other. They also undergo elastic collisions and have no intermolecular forces. Among the given options, the molecule that comes closest to the assumptions of an ideal gas is helium (He). Helium is a monatomic gas with a simple atomic structure and a low boiling point, which allows its particles to behave closely to the assumptions of the kinetic molecular theory. Therefore, the correct answer is D) He.

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Answer:

length

Explanation:

It's the distance covered by light in one year.

Answer: Whats ur Question?

Explanation:

The concentration of CO₃²⁻ in the hydronium-ion concentration of a 6.00×10−4M H₂CO₃ solution will be 4.3 × 10^-11 M.

The dissociation of carbonic acid can be represented by the following equation:

H₂CO₃(aq) + H₂O(l) ⇌ HCO₃−(aq) + H₃O+(aq)

The equilibrium constant for this reaction, Ka, is 4.3 × 10^-7.

We can use the equilibrium constant to calculate the concentration of hydronium ions in a solution of carbonic acid.

[H₃O+] = [HCO₃−]Ka/[H₂CO₃]

[H₃O+] = (6.00 × 10^-4) × 4.3 × 10^-7 / 6.00 × 10^-4

[H₃O+] = 4.3 × 10^-11 M

The concentration of carbonate ions can be calculated using the following equation:

[CO₃²⁻] = [H₂CO₃]Ka/[H₃O+]

[CO₃²] = (6.00 × 10^-4) × 4.3 × 10^-7 / 4.3 × 10^-11

[CO₃²⁻] = 6.00 × 10^-4 M

Therefore, the hydronium ion concentration of a 6.00×10−4M H₂CO₃ solution is 4.3 × 10^-11 M, and the concentration of carbonate ions is 6.00 × 10^-4 M.

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Clayey soil can absorb more water due to its comparatively large pore size and ability to hold the water molecules.

Soil is composed of components such as minerals, gas, water and organic matter. It is divided into three components viz. sand, silt and clay.

The ability of a soil to absorb water depends upon its pore size. In clayey soil, it has relatively large pore size so the water molecules can be easily absorbed and stored in the pores unlike sandy soil.

Clay particles have cohesive force between them which helps to hold water molecules together, whereas this cohesive force is absent in sandy soil.

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The radioactive isotope Technium-99 decays most likely through alpha decay (99tc). An atomic nucleus emits an alpha particle during the radioactive decay process known as "alpha decay".

and then changes or "decays" into a separate atomic nucleus with a mass number that is decreased by four and an atomic number that is decreased by two. The nucleus of an atom of helium-4 is the same as an alpha particle. Radioisotopes are an element's radioactive isotopes. They are the atoms with unstable neutron-proton combinations or excess energy in their nuclei. During those processes, the radionuclide is said to experience radioactive decay, albeit the surplus energy may be put to use in any number of ways.

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Answer:

The correct answer is - cellular respiration is when chemical energy from sugar/glucose is converted to cellular energy in the form of ATP.

Explanation:

Cellular respiration is a set of metbolic reaction that takes place inside the cell and breaking the sugars or nutrients to convert the chemical energy present in the nutrients into the cellular energy whic is used by cells that is ATP and release water and carbon dioxide as waste.

In this process the ammount of energy store in the cellular currecncy or ATP which is the form of energy that is utilized by the to perform its sunction. The chemical energy that is present in the nutrients or sugar is come from light energy which is stored in the nutrients by photosyntheis process.

Answor

c                                              

Explanation:

The change in temperature of the gas mixture is -68.4 K [1][2]. This can be calculated using the ideal gas law equation, PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.

By rearranging the equation, we can calculate the change in temperature as follows:

Where T1 is the initial temperature and n1 and n2 are the number of moles of He and Ar, respectively. Substituting the given values, we get:

Solving for T2, we get T2 = -68.4 K.

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To differentiate between the ETC being blocked at the first step and the second step, the compound that can help differentiate between the two steps is cytochrome c. The correct option is c.

If the ETC is blocked at the first step (ubiquinone ⇒ Complex III), cytochrome c would be in its reduced state.

On the other hand, if the ETC is blocked at the second step (Complex III ⇒ cytochrome c), cytochrome c would be in its oxidized state.

Therefore, the correct option is c

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Complete question:

We have established that an inhibitor causing the accumulation of reduced ubiquinone could block the ETC at any of three possible steps.

1. ubiquinone⇒ Complex III

2. Complex III ⇒cytochrome c

3. cytochrome c⇒ Complex IV

What would be different if the ETC were blocked at the first step listed compared with the second step listed? You would find that ubiquinone was reduced in both cases, but there would be a differentiating factor.

You can differentiate between the first step listed and the second step listed by knowing the oxidation state of which compound.

a. Complex III

b. Complex IV

c. ubiquinone

d. Complex I

e. Complex II

f. cytochrome c

Constructed languages are artificial languages created for a particular purpose like for art, entertainment, religion, secret communication, international communication, or for any other reason.

They are also known as invented languages or fictional languages. Here are the constructed languages from the given list:

a. Mandarin: It is not a constructed language. It is the most widely spoken language in the world.

b. Loglan: It is a constructed language created in 1955 for scientific research by James Cooke Brown.

c. Esperanto: It is a constructed language created by a Polish doctor Ludwik Lazarus Zamenhof in 1887, to promote international understanding.

d. Na'vi: It is a constructed language created by linguist Paul Frommer for the movie Avatar directed by James Cameron.

e. English: It is a natural language that developed over thousands of years.

f. lojban: It is a constructed language developed in the 20th century for use in linguistic studies and as a philosophical language.

g. Klingon: It is a constructed language invented for the science fiction franchise Star Trek by Marc Okrand.

h. Latin: It is a natural language that was the language of the Roman Empire in ancient times.

Constructed languages from the given list are Loglan, Esperanto, Na'vi, lojban, and Klingon.

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When \(NH_4NO_3\) dissolves in water, the enthalpy of the system decreases, and the entropy of the system increases. The increase in entropy is the driving force of the process, causing the solute to dissolve in the solvent. Option A is the correct answer.

When \(NH_4NO_3\) dissolves in water, it undergoes an endothermic process in which heat is absorbed from the surroundings, causing the temperature of the solution to decrease. This suggests that the dissolution process is driven by an increase in the system's entropy, rather than by a decrease in enthalpy.

The enthalpy change of the system can be determined by measuring the heat of the solution, which is the amount of heat absorbed or released when a solute dissolves in a solvent. In the case of \(NH_4NO_3\), the heat of the solution is positive, indicating an endothermic process in which heat is absorbed. This means that the enthalpy of the system decreases when \(NH_4NO_3\) dissolves in water.

The entropy change of the system can be determined by calculating the difference in the entropy of the solution and the sum of the entropies of the separate components (the solute and the solvent) before mixing. In the case of \(NH_4NO_3\) dissolving in water, the increase in the disorder of the system is driven by the release of ammonium ions and nitrate ions into the solvent. The disorder of the system increases because the ions become more dispersed and move around freely in the solution. This increase in entropy is the driving force of the process.

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Complete question:

Which of the following describes the enthalpy and entropy changes of the system when \(NH_4NO_3\) dissolves in water, and which change drives the process?

a) Enthalpy decreases and entropy increases; entropy change drives the process

b) Enthalpy increases and entropy decreases; enthalpy change drives the process

c) Enthalpy decreases and entropy decreases; enthalpy change drives the process

d) Enthalpy increases and entropy increases; entropy change drives the process

Answer:

Electromagnetic Wave Medium Matter:The ability to move or change an object, or what a wave

Longitudinal Wave Trough Rarefaction: The area in a longitudinal wave where the particles are close together.

Transverse Wave Energy Wavelength: The highest point of a transverse wave

Explanation:

give me brainliest

Answer: The Computer: Similarities and Differences. Both use electrical signals to send messages. The brain uses chemicals to transmit information; the computer uses electricity. Even though electrical signals travel at high speeds in the nervous system, they travel even faster through the wires in a computer

Explanation: I hoped that helped. -wear,mask

Answer:

Option C is correct

Explanation:

Covalent substances have weaker intermolecular attractions.

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The characteristic that best explains the difference in melting behaviors is

The melting point of covalent substances ( i.e. substances bounded by covalent bonding ) is lower than the melting point of ionic substances, this is because of the weak intermolecular attractions which exists in covalent compounds and this makes atoms in covalent substance to dissociate easily .

Hence we can conclude that the characteristic that best explains the difference in melting behaviors is Covalent substances have weaker intermolecular attractions.

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Answer:

19 dollar fortnite card who wants it

Explanation:

and yes it is free

20.328 liters of oxygen gas, at STP, are produced by the decomposition of 0.605 moles of potassium chlorate.

STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.

According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -

It is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.

One mole of a gas under STP conditions occupies a volume of 22.4L.

Given,

Moles of potassium chlorate = 0.605 moles

From the reaction, 2 moles of potassium chlorate give 3 moles of oxygen.

Therefore, 1 mole of potassium chlorate will give 3÷2 moles of oxygen.

Thus, 0.605 moles give ( 3÷2) × 0.605 moles of oxygen

= 0.9075 moles of oxygen.

1 mole occupies 22.4 L of volume

So, 0.9075 moles will occupy 0.9075 × 22.4

= 20.328 L

Therefore, 20.328 liters of oxygen gas, at STP, are produced by the decomposition of 0.605 moles of potassium chlorate.

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The best order for the synthesis of the compound shown from benzene would be 1. nitration, 2. bromination, and 3. reduction.

Firstly, nitration involves adding a nitro group (-NO₂) to the benzene ring, which is achieved by reacting benzene with a mixture of concentrated nitric and sulfuric acid. This reaction is highly exothermic and can result in the formation of undesirable by-products if not carefully controlled. However, once the nitro group is added, it provides a suitable handle for subsequent functionalization reactions.

Next, bromination involves adding a bromine atom (-Br) to the benzene ring, which is achieved by reacting the nitrobenzene with a bromine source such as iron(III) bromide. This reaction replaces the nitro group with a bromine atom, which is more reactive and can undergo further reactions.

Finally, reduction involves converting the bromonitrobenzene to the desired compound by reducing the nitro and bromine groups to amine and alkyl groups, respectively. This can be achieved using a reducing agent such as hydrogen gas and a metal catalyst such as palladium on carbon. The reduction reaction must be carefully controlled to avoid over-reduction or under-reduction of the functional groups.

In summary, the best order for the synthesis of the compound shown from benzene is nitration, bromination, and reduction. This order ensures that the functional groups are added and modified in a controlled manner to achieve the desired product.

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An example of a physical change is ice melting. Gasoline burning, potassium chlorate decomposing, and iron rusting, on the other hand, are examples of chemical changes.

Physical changes involve alterations in the physical properties of a substance without any change in its chemical composition, while chemical changes involve the formation of new substances with different chemical properties.

Ice melting is a physical change because it involves a phase transition from solid to liquid without any change in the chemical composition of the water molecules. The water molecules remain the same, but their arrangement changes as the temperature increases and the solid ice converts into liquid water.

Gasoline burning, potassium chlorate decomposing, and iron rusting, on the other hand, are chemical changes. Gasoline burning is a combustion reaction where gasoline reacts with oxygen to produce carbon dioxide, water vapor, and release energy.

Potassium chlorate decomposing involves the breaking down of potassium chlorate into potassium chloride and oxygen gas through a chemical reaction. Iron rusting is a chemical reaction between iron, oxygen, and moisture in the air, resulting in the formation of iron oxide (rust).

In all these examples, new substances are formed with different chemical properties compared to the original substances. These chemical changes involve the breaking and forming of chemical bonds, resulting in the formation of new compounds or substances.

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Answer:

The movement of Euglena is via flagella whereas Amoeba moves by pseudopodia.

Explanation:

Euglena lives in fresh water whereas amoeba is free living in damp environment or as parasite. they have different mode locomotion.

Answer:

2.469×10²⁴ molecules

Explanation:

Multiply by Avogadro's Number (6.022×10²³

A solid Ba(IO₃)₂ will form when 7.5mg of barium chloride is dissolved in 500ml of 0.023m sodium iodate.

To determine whether a solid Ba(IO₃)₂ will form when 7.5 mg of barium chloride is dissolved in 500 mL of 0.023 M sodium iodate, we need to compare the solubility product (Ksp) of Ba(IO₃)₂ to the ion product (Q) at the given conditions.

The Ksp of Ba(IO₃)₂ is 1.5 × 10⁻⁹ at 25°C.

The ion product, Q, is calculated by multiplying the concentrations of the ions in solution raised to their stoichiometric coefficients. In this case, Ba₂⁺ and IO₃⁻ are in a 1:2 ratio, so:

Q = [Ba₂⁺][IO₃⁻ ]²

The concentration of Ba₂⁺ is determined by the amount of barium chloride dissolved in the solution:

0.0075 g BaCl₂ x (1 mol BaCl₂/208.23 g) x (1 mol Ba₂+/1 mol BaCl₂) / 0.5 L = 1.804 × 10⁻⁵ M Ba₂⁺

The concentration of IO₃⁻ is given as 0.023 M.

Plugging these values into the equation for Q:

Q = (1.804 × 10⁻⁵)(0.023)² = 9.87 × 10⁻⁹

Since Q > Ksp, the ion product exceeds the solubility product and a solid Ba(IO₃)₂ is expected to form.

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Answer:

Q

Explanation:

I took the test.

Answer:

Explanation:

179.8548 g/mol

The total mass of all the atoms that make up a mole of a specific molecule, measured in grams, is known as the molar mass or molecular weight. Here the molar mass of Fe(NO₃)₂ is 179.87 g/mol.

One mole of any substance has a mass known as a molar mass. An amount that has a mass equal to its atomic or molecular mass in grams is referred to as a mole of any species (atoms, molecules, ions, or particles). The letter "M" stands for molar mass.

In other terms, the molar mass is the sum of the masses of all the atoms that make up a mole of a specific molecule, expressed in grams.

Here the molar mass of Fe(NO₃)₂ is :

Fe(NO₃)₂ = (1 x 55.85 g) + (2 x 14.01 g) +(6 x 16.00 g)= 179.87 g/mol

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