Given the balanced equation representing a redox reaction:


2Al + 3Cu2+ → 2Al3+ + 3Cu



Which statement is true about this reaction?

Explanation:

To answer this question, we will use the Clapeyron equation.

The Clapeyron equation is a mathematical expression proposed by the French physicist-chemist and civil engineer Benoit-Pierre-Émile Clapeyron and was formulated to describe the behavior of a perfect gas. Look at the following equation:

P.V = n.R.T

P = pressure generated by the gas on the walls of the container;

V = volume occupied by the gas and can be expressed in liters or cubic meters;

n = number of mol (amount of substance in the gas);

Obs.: The number of moles is expressed by the ratio between the mass of the gas (m) and its molar mass (M);

R = general gas constant proposed by Clapeyron and depends on the pressure unit used (in atm, it is 0.082; in mmHg, it is 62.3; in KPa, it is 8.31);

T = temperature at which the gas is subjected (always used in the unit Kelvin).

The question gives us:

n = 17.9 moles

P = 9.7 atm

V = 17 L

R = 0.082 atm.L/K.mol

T = ?

So:

9.7*17 = 17.9*0.082*T

T = 164.9/1.4678

T = 112.3 K

Answer: 112.3 K

The empirical formula gives us the smallest ratio between the elements of a compound. In this case, we can still find the empirical formula, because you can divide 4 and 10 by 2.

So:

4/2 = 2

10/2 = 5

The empirical formula for this compound is P2O5.

Answer: alternative "B" False

Answer:

Hot and rainy conditions

Explanation:

High temperatures and greater rainfall increase the rate of chemical weathering. Rocks in tropical regions exposed to abundant rainfall and hot temperatures weather much faster than similar rocks residing in cold, dry regions. A cold, dry climate will produce the lowest rate of weathering. A warm, wet climate will produce the highest rate of weathering. The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering.

Got these from the internet to help explain. Hope it helps!

Answer:

1.674 x 10^-23 grams

Explanation:

Hydrogen-1 is called Protium

wikipedia

atomic mass of Protium is 1.00794 amu

sciencedirectcom

atomic mass of 10 Protiums is 10.0794 amu

10.0794 amu in grams is

1.6737236x10^-23 grams

Answer:

For, this question,

The balanced equation is; 2Al + 3 ----> 2Al

We can now, calculate how many grams of will be needed to completely convert 15 g of Al into Al.

Here, the reaction produces, 2 moles of Al

So, For 15.0 g of Al; we can calculate;

(15.0 g Al) X (1 mole Al / 26.98 g Al) X (3 moles / 2 moles Al) X (159.81 g / 1 mole )

= 133 g of  will be needed.

Therefore, 133g of will be needed to completely convert 15 g of Al into Al.

Explanation:

One molecule of propanol contains only one -OH group and not three -OH groups or three -CH3 groups.

The -OH group is attached to the central carbon atom and makes propanol a useful solvent and intermediate in organic chemistry.Propanol is a colorless liquid that belongs to the family of alcohols. It has the formula C3H8O, and it contains three carbon atoms, eight hydrogen atoms, and one hydroxyl group (-OH) attached to one of the carbons. One molecule of propanol contains only one -OH group, which is attached to the central carbon atom.

Thus, option (2) is the correct answer, and the other options are incorrect.The -OH group in propanol is responsible for its unique chemical and physical properties. It makes propanol soluble in water and other polar solvents and gives it a high boiling point of around 97°C. The hydroxyl group can also participate in chemical reactions, such as esterification, dehydration, oxidation, and reduction. For example, propanol can be oxidized to form propanal and then propanoic acid, which is a useful synthetic intermediate for many organic compounds.Apart from the -OH group, propanol also contains two other functional groups called methyl groups (-CH3). These are attached to the two carbon atoms adjacent to the central carbon. However, the question only asks about the number of -OH groups in propanol, so the methyl groups are irrelevant.
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Answer:

the company is now aarav and its CEO of samruddhi and is the CEO in meeting with holika and will come in to help with holika as brainlyiest as the company's chief financial adviser to solve di problems

Explanation:

it was the most common thing that happened in my first pregnancy in my first year and I m and the other girl Bo.. were pretty good vibes for the last day of samruddhi but they are still very much a many years after I was knowing that

The Voltage is the pressure from the electrical circuit of the power source that passes the current.

The Voltage is defined as the pressure from the electrical circuit of the power source that will passes the charged electrons that is the current through the conducting loop, it will enable them to do work  because of the illuminating the light. The in simple terms is : voltage = pressure, and it is denoted as the volts and the symbol is the V.

The voltage is described as the force that causes the flow of the charged particles. The Voltage is also called as the electromotive force.

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Answer:

If gold has a rare, high density then it would sink quickly. If mixed substances that are less-valued, are added to the gold crown (remember that gold is rare and very dense which makes it special) then we can assume the cheap substances are less dense, thus making the crown FLOAT more rather than sink (I say more, because unless the crown was extremely mixed with cheap material then it could possibly float but it depends on how much is in the crown). Summary: The crown would either be lighter and float, or barely be sunken due to the less-dense substance.

*Hint to think about: People consider cheaper things lighter such as plastic ring/less dense  for example, compared to a silver ring which is heavier/more dense (btw heavy does not always mean high density, it depends on the liquid density )

Hope this actually helps!

Explanation:

High-Desnity=Sink

Low Density=Float

Answer:

A

an element made of carbon and oxygen atoms.

So I think the answer is going to be A An element made of carbon and oxygen atoms.

The change in enthalpy for the given reaction is +330 kJ.

To calculate the change in enthalpy for the reaction:

4XY3 + 7Z2 ⟶ 6Y2Z + 4XZ2

we need to use the Hess's Law, which states that if a chemical reaction can be expressed as the sum of several stepwise reactions, the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the individual reactions.

We can write the reaction in terms of the given thermochemical equations as follows:

4XY3 ⟶ 2X2 + 6Y2 (reverse of equation 1, with ΔH = +370 kJ)

2X2 + 4XZ2 ⟶ 8XY3 (multiply equation 2 by 2, with ΔH = -2×130 kJ = -260 kJ)

2Y2 + Z2 ⟶ 2Y2Z (reverse of equation 3, with ΔH = +220 kJ)

Adding these three equations gives:

4XY3 + 7Z2 ⟶ 6Y2Z + 4XZ2 (with ΔH = 370 kJ - 260 kJ + 220 kJ = +330 kJ).

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Explanation:

Mg+NaF. NaF+Mg

are use sure about the question

Answer:

You would see whatever liquid you added slowly disappearing

Explanation:

Hope this helps:)........if not then sorry for wasting your time and may God bless you:)

Answer:

If you take a clear cup of water and put a camera to watch it, If you time lapsed it, you would see the water slowly evaporate.

Explanation:

Hope this helped :)

The total volume of the solution prepared by dissolving 48.0 grams of Ca(OH)₂ in enough water is 0.865 L

First, we shall obtain the mole of 48.0 grams of Ca(OH)₂. This is shown below:

Mole = mass / molar mass

Mole of Ca(OH)₂ = 48 / 74

Mole of Ca(OH)₂ = 0.649 mole

Finally, we shall obtain the total volume of the Ca(OH)₂ solution. Details below:

Volume = mole / molarity

Volume of solution = 0.649 / 0.750

Volume of solution = 0.865 L

Thus, we can conclude that the total volume of the solution is 0.865 L

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Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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Option D - They are negatively charged and located outside the nucleus is the correct alternative.

We have electrons.

We have to determine which of the given statements are true about electrons.

An electron is a negatively charged subatomic particle that can be either bound to an atom or free (not bound).

According to the question -

The role of electrons inside the atom is as follows -

Hence, Option D is the correct alternative.

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The atomic number 11 element is sodium. It's from the s block. Sodium is a very soft metal. Praseodymium is an element with the atomic number 59.

An element is a material that, when heated or illuminated, cannot be divided into two or maybe more simpler compounds by any chemical technique.

For example, when a piece of gold is melted, it still melts as well as stays as the gold element. Praseodymium is an element with the atomic number 59. It is a member of the Lanthanide series. The atomic number 11 element is sodium. It's from the s block. Sodium is a very soft metal.

Therefore, the atomic number 11 element is sodium. It's from the s block. Sodium is a very soft metal. Praseodymium is an element with the atomic number 59.

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The correct answer is "decendent." Embalming authorization may be given by the bailee, next of kin, or spouse, but not by the decedent.

The term "decedent" refers to the person who has died; they are unable to give consent for embalming or any other post-mortem procedures. According to legal and cultural customs, the choice to embalm is often taken by the designated representative, such as the bailee (person in charge of the body), next of kin, or spouse.

Hence, embalming authorization may be given by the bailee, next of kin, or spouse, but not by the decedent.

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As the temperature of the gas in a the volume of the balloon increases.

Each three-dimensional object occupies a few space. This space is measured in phrases of its extent. Extent is described as the gap occupied in the obstacles of an object in three-dimensional area.

Why is extent used?

Whether or not you are measuring out ingredients for a recipe, filling up a car's fuel tank or just including detergent to the showering machine, math and extent come are used regularly in day by day existence. From measuring liquids to assessing ingesting amounts, volume is necessa.

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The concentration (molarity) of the final NaCl solution is 175 M.

To find the concentration (molarity) of the final NaCl solution, we can use the equation:

M1V1 = M2V2

Where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.

In this case, we have an initial NaCl solution with a concentration of 2.5 M and a volume of 350 mL (0.350 L). We are diluting this solution to a total volume of 5.0 mL (0.005 L).

Plugging these values into the equation, we have:

(2.5 M) * (0.350 L) = M2 * (0.005 L)

Simplifying the equation:

0.875 = 0.005 * M2

Dividing both sides by 0.005:

M2 = 0.875 / 0.005

M2 = 175M

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Answer:

the volume of a gas is changed from ___ mL to 852 mL, the temperature will change from 588 K to 725 K.V(volume) = [?] mLAssume that the number of moles and the pressure remain constant.To find the initial volume of the gas, we can use the combined gas law, which states that: (P1V1)/T1 = (P2V2)/T2 We are given the initial temperature T1 = 588 K and the final temperature T2 = 725 K. We are also told that the number of moles and the pressure remain constant, so we can assume that P1 = P2 and n1 = n2. Let's plug in the values we have: (P1V1)/588 = (P1*852)/725 Simplifying this equation, we can isolate V1: V1 = (588*852)/725 V1 = 691.2 mL Therefore, the initial volume of the gas was 691.2 mL.

In the context of this problem, we can utilize Charles's Law which states the volume of a gas is directly proportional to its absolute temperature. We solve for the unknown volume (V1) using the provided values and the formula derived from Charles's Law. The estimated answer is approximately 686 mL.

The subject of your question involves the concept of gas laws specifically the Charles's Law which states that the volume of a gas is directly proportional to its absolute temperature, provided the number of moles and pressure remain constant. In this scenario, we can apply Charles's Law as both the number of moles and pressure are constant. To find the unknown volume, we should use the formula (V1/T1) = (V2/T2), where V1 is the unknown volume, T1 is the initial temperature, V2 is the final volume and T2 is the final temperature. In this case, the question left V1 blank, T1 is 588K, V2 is 852 mL and T2 is 725K. So its critical to ensure that temperatures are in Kelvin.

Arranging the formula to solve for V1, we have: V1 = (V2 * T1) / T2. Substituting the given values, we get: V1= (852 mL * 588 K) / 725 K = 685.9 mL

Therefore, the unknown volume V1, when the gas was initially at a temperature of 588K, would be approximately 686 mL.

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Answer:

methane

Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp

From the calculations, we can see that the methane gas, oxygen gas and fluorine gas all have the same volume.

Now we know that we could be able to obtain the volume in each case by the use of the idea gas equation. We know that the temperature is  44 °C or 317 K and the pressure is 745 mm Hg or 0.98 atm.

Now;

For methane;

n = 16 g/16 g/mol = 1 mole

V = nRT/P

V = 1 * 0.082 * 317/0.98

= 26.5 L

For oxygen;

n = 32 g/32 g/mol = 1 mole

V = nRT/P

V = 1 * 0.082 * 317/0.98

= 26.5 L

For fluorine;

n = 38 g/38 g/mol = 1 mole

V = nRT/P

V = 1 * 0.082 * 317/0.98

= 26.5 L

Hence, they all occupy the same volume

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To solve such this we must know the concept of combination reaction. Therefore, the given reaction CH\(_4\)+Br\(_2\) \(\rightarrow\)CH\(_3\)Br+ HBr is a combination reaction.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

CH\(_4\)+Br\(_2\) \(\rightarrow\)CH\(_3\)Br+ HBr

The above reaction is a combination reaction. In combination reaction, more than one reactant combine to form a product. Because new chemicals are created during combination reactions, they are often referred to as synthesis.

Therefore, the given reaction is a combination reaction.

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Answer:a

Explanation:

Answer:

Answervis A.

Explanation:

Because,so that other scientists can validate the results.

I hope it's helpful!

Answer:

Yes

Explanation:

The speed of light is about 300 000 km per second, so light takes about 1.28 seconds to travel from the Moon to the Earth.

Answer:

Explanation:

ask you teacher

Answer:

Nitric acid is a strong acid meaning it completely dissociates in water. Therefore, you can say that the concentration of H+ ions in solution is the same as the concentration of the acid (molar concentration). So once you have that, you can use the pH formula to find the pH of the acid.

pH = -log[H+]

So if you have .15 M HNO3 the pH is 0.82.

But, if you have a different concentration, the pH will change.

Explanation:

Remember that

#1

Carbon is present so it's covalent

#2

#3

#4

#5

Answer: Avogrado's Constant

Explanation:

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles.

Answer:

3.33 ml

Explanation:

We have

pH to be equal to pKa + log [ NaAc / HAc]

pH = 4.30

pKA = 4.78

This is expressed as

4.30 = 4.78 + log [ NaAc / HAc]

log [ NaAc / HAc] = - 0.48

[ NaAc / HAc] = 10^-0.48

= 0.33

Naac/HAc = 0.33

From here we cross multiply to get

NaAc = 0.33 HAc

The ratio can be given as 1 : 0.33 or 3:1

Moles of NaAc = 800 x 0.10 / 1000

= 0.08

With a ratio of 3 : 1 NaAC and HAc

We have 0.06 mol NaAc and 0.02 mol HAc

moles of HCl = 0.02 mol

Volume of Hcl = 0.02x1000 = 20

20/6.0

= 3.33 Ml

The volume of 6.0 M HCL should be 3.33 ml.

Since

pH to be equal to pKa + log [ NaAc / HAc]

pH = 4.30

pKA = 4.78

Now we can do like

4.30 = 4.78 + log [ NaAc / HAc]

log [ NaAc / HAc] = - 0.48

[ NaAc / HAc] = 10^-0.48

= 0.33

Naac/HAc = 0.33

Now

NaAc = 0.33 HAc

The ratio can be given as 1 : 0.33 or 3:1

So,

Moles of NaAc = 800 x 0.10 / 1000

= 0.08

With a ratio of 3 : 1 NaAC and HAc

We have 0.06 mol NaAc and 0.02 mol HAc

And,

moles of HCl = 0.02 mol

So,

Volume of Hcl = 0.02x1000 = 20

= 20/6.0

= 3.33 Ml

hence, The volume of 6.0 M HCL should be 3.33 ml.

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