Which part of the sepal of a flower is most damaged by air pollution

Answer:

this is because the salt may be acidic and also may have oxygen substituent which can lead to rust

During cold winters, the salt present on the roads reacts with the iron and the dew water and results in the formation of the iron oxide as rust.

The rust has been given as the iron oxide compound, that has been formed with the reaction of the water with the iron in the presence of oxygen.

In the winters, there has been the presence of the water in the salt, and the interaction of the salt with the iron to form the iron oxide that is rust.

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Answer:

Mesosphere. This layer extends from around 31 miles (50 km) above the Earth's surface to 53 miles (85 km). The gases, including the oxygen molecules, continue to become denser as one descends. As such, temperatures increase as one descends rising to about 5°F (-15°C) near the bottom of this layer.

Explanation:

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The structure of the tripeptide Glu-Ser-Ala at pH 12 can be represented as follows:

H_(2)N - Glu - Ser - Ala - COOH

In the structure, H_(2)N represents the amino terminus (N-terminus) with a free amine group, and COOH represents the carboxyl terminus (C-terminus) with a free carboxyl group.

Glu represents the amino acid glutamic acid, which has a carboxyl group (COOH) and a side chain containing a carboxyl group and an amino group.

Ser represents the amino acid serine, which has a hydroxyl group (OH) in its side chain.

Ala represents the amino acid alanine, which has a methyl group (CH_(3)) in its side chain.

Please note that at pH 12, the Glu residue will be negatively charged due to the deprotonation of its carboxyl group, and the Ser and Ala residues will be in their neutral forms. The peptide bond between each amino acid is formed through a condensation reaction, with the loss of a water molecule.

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The only correct statement among the options as they are listed is that; A solute dissolves in a solvent to make up a solution (Option B)

A solution is composed of a solute and a solvent. The solute is the solid that is dissolved in the solvent while the solvent is the medium in which the solid is dissolved.

Given that the solute can be a solid, liquid or gas, a solution could be homo--genous or het--erogenous as the case may be.

Thus, the only correct statement among the options as they are listed is that; A solute dissolves in a solvent to make up a solution (Option B)

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Answer:

Because of the earths rotation

Explanation:

But it appears to rise and set because of the Earth's rotation on its axis. It makes one complete turn every 24 hours. ... As the Earth rotates toward the east, it looks like the sun is moving west. As the Earth rotates, different locations on Earth pass through the sun's light.

Answer:

When the earth is rotating, it is rotating away and towards the sun which is why we have day and night

Explanation:

Answer:

133.85 K

Explanation:

Initial pressure, P₁ = 635 torr

Initial temperature, T₁ = 67.0°C = 340 K

Final pressure, P₂ = 250 torr

We need to find the new temperature. The relation between temperature and pressure is given by :

\(\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{250\times 340}{635}\\\\T_2=133.85\ K\)

So, the new temperature is equal to 133.85 K.

Answer:

101.18 grams

Explanation:

From the equation you can see that the same number of MOLES will be required as MOLES of aluminum chloride produced.

Mole weight of aluminum chloride = 26.981 + 3 * 35.45 = 133.331 gm

     500 gms of this is then    500 / 133.331 = 3.75 moles

So you need 3.75 moles of aluminum

    3.75 moles * 26.981 g/mole = 101.18 grams of Al

101.07 grams of aluminum (Al) are required to produce 500 grams of aluminum chloride (AlCl₃) according to the given chemical equation.

Mass is a fundamental physical property of matter that represents the amount of substance contained in an object. It is a measure of the total amount of matter or material in an object, and it is typically measured in units such as grams (g) or kilograms (kg).

Molar mass, also known as molecular mass or formula mass, is the mass of one mole of a chemical substance. It is usually expressed in grams per mole (g/mol). Molar mass is a fundamental concept in chemistry that allows scientists to relate the mass of a substance to the number of moles it contains.

The balanced chemical equation is:

2Al + 3Cl₂ → 2AlCl₃

From the balanced equation, 2 moles of aluminum (Al) react with 3 moles of chlorine gas (Cl₂) to produce 2 moles of aluminum chloride (AlCl₃).

Molar mass of Al = 26.98 g/mol

Molar mass of Cl = 35.45 g/mol

Molar mass of AlCl₃ = 2 × (26.98 g/mol) + 3 × (35.45 g/mol)

= 133.34 g/mol

moles of AlCl₃ = mass / molar mass

moles of AlCl₃ = 500 g / 133.34 g/mol

= 3.749 moles

In the reaction, 2 moles of Al react to produce 2 moles of AlCl₃.

Therefore, moles of Al = moles of AlCl₃

moles of Al = 3.749 moles

Step 4: Calculate the mass of Al required:

mass of Al = moles of Al × molar mass of Al

mass of Al = 3.749 moles × 26.98 g/mol

= 101.07 g

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Answer:

B is the outer part atom .

The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). The atoms have different properties based on the arrangement and number of their basic particles.SO the hydrogen atom (H) contains only one proton, one electron, and no neutrons

Explanation:

Answer:

I solved the questions then counted how many significant figures in each answer

eg,

0.042m+1.33m =1.372m

1.372 has 4 significant figures

that's how you do others

Explanation:

6. 1.372m = 4 significant figures

7. 4.345g = 4 significant figures

8. 12L = 2 significant figures

9. 27.3cm = 3 significant figures

10. 0.975 = 3 significant figures

Answer: 120 mL of ethanol must be added.

Explanation:

We are given:

60% ethanol by volume

This means that 60 mL of ethanol is present in 100 mL of solution

Given volume of solution = 200 mL

Applying unitary method:

If 100 mL of solution contains 60 mL of ethanol

So, 200 mL of solution will contain = \(\frac{60}{100}\times 200=120mL\) of ethanol

Hence, 120 mL of ethanol must be added.

24 moles of \(PbCl_2\) are created when 16 moles of \(AlCl_3\) are used up.

According to the balanced chemical equation, 2 moles of \(AlCl_3\) are required to produce 3 moles of \(PbCl_2\). Therefore, if 16 moles of \(AlCl_3\) are consumed, the amount of \(PbCl_2\) produced would be:
(16 mol \(AlCl_3\)) x (3 mol \(PbCl_2\) / 2 mol \(AlCl_3\)) = 24 mol \(PbCl_2\)

Therefore, 24 moles of \(PbCl_2\) are produced when 16 moles of \(AlCl_3\) are consumed.
Using the balanced chemical equation, we can determine the amount of \(PbCl_2\) produced when 16 moles of \(AlCl_3\) are consumed:

3Pb(NO3)2 + 2 \(AlCl_3\) → 3PbCl2 + 2Al(NO3)3

From the equation, we see that 2 moles of AlCl3 produce 3 moles of \(PbCl_2\). To find the amount of \(PbCl_2\) produced by 16 moles of \(AlCl_3\), set up a proportion:

(3 moles \(PbCl_2\)) / (2 moles \(AlCl_3\)) = (x moles \(PbCl_2\)) / (16 moles \(AlCl_3\))
Cross-multiply and solve for x:

(3 moles \(PbCl_2\))(16 moles \(AlCl_3\)) = (2 moles \(AlCl_3\))(x moles \(PbCl_2\))
48 moles \(PbCl_2\) = 32 moles \(AlCl_3\) = 24 moles PbCl2
So, when 16 moles of \(AlCl_3\) are consumed, 24 moles of \(PbCl_2\) are produced.

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Answer: Low temperature high pressure

Explanation: i’m literally doing the same quiz right now

Answer:

its an helium gas are contained in a 4.0L at STP? 0.17

Explanation:

because the elements in column 2.21 is what quantity of gas in holes

Explanation:

\( \frac{given \: mass}{molar \: mass} \)

hope it helps:)

D is the answer so now we can understand

Answer:

to my understanding D iz da answer

Explanation:

let hope dat it will help u

Answer: Therefore, approximately 0.1247 moles of ammonia can be produced from the given reaction.

Explanation:

To determine the number of moles of ammonia (NH3) produced from the given reaction, we need to use the ideal gas law and stoichiometry.

The balanced chemical equation for the reaction between hydrogen (H2) and nitrogen (N2) to form ammonia (NH3) is:

N2 + 3H2 → 2NH3

From the equation, we can see that three moles of hydrogen react with one mole of nitrogen to produce two moles of ammonia.

First, let's convert the given conditions of hydrogen to the appropriate units for the ideal gas law:

Volume of hydrogen = 4.0 liters

Temperature of hydrogen = 50.0°C = 50.0 + 273.15 = 323.15 K

Pressure of hydrogen = 1.2 atm

Now, let's calculate the number of moles of hydrogen using the ideal gas law equation:

PV = nRT

where:

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

n(H2) = PV / RT

n(H2) = (1.2 atm) * (4.0 L) / (0.0821 L·atm/(mol·K) * 323.15 K)

≈ 0.187 mol

Since the stoichiometry ratio is 3:2 (H2:NH3), we can conclude that 0.187 moles of hydrogen can produce (0.187/3) * 2 = 0.1247 moles of ammonia.

The elements that have least protons to those having the most protons in the atoms are:

B. C, Al, P, Cl

There is an equal number of protons and electrons in an atom. So when moving across a period in a periodic table the number of electrons increases which also shows the increases in a number of protons. So as the atomic number increases, the number of protons and electrons also increases.

Thus, the order of elements having least to greatest protons are:

C, Al, P, Cl

C has 6 atomic number, Aluminium has 13 atomic number , Phosphorus has 14 atomic number and atomic number of chlorine is 17.

Thus, option B is correct.

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The 4-methyl pentane-2-ol (\(C_6H_{14}O\)) is an alcohol compound with a methyl group attached to the fourth carbon atom and a hydroxyl group attached to the second carbon atom in a five-carbon chain.

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Using the density, the mass of sulfuric acid is 2292.82 grams.

We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as

ρ = m / V

where ρ is density, m is mass and V is volume

From the question above, we know that

ρ = 1.31 g/mL

V = 1 gallon = 4546.09 mL

% sulfuric acid = 38.5%

By substituting the following parameters, we get total mass

ρ = m / V

m = ρ .V

m = 1.31 . 4546.09

m = 5955.38 grams

Find the sulfuric acid mass

ms = %sulfuric acid x m

ms = 38.5% x 5955.38

ms = 2292.82 grams

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Answer:

Mechanical energy is energy that results from movement or the location of an object. Mechanical energy is the sum of kinetic energy and potential energy.

Explanation:

Nuclear energy is energy resulting from changes in the atomic nuclei or from nuclear reactions.

Example: Nuclear fission, nuclear fusion, and nuclear decay are examples of nuclear energy. An atomic detonation or power from a nuclear plant are specific examples of this type of energy.

Answer:

The answer to this is A. One kind of atom

Explanation:

The other options make no sense whatsoever. But enjoy.

I hope this helped.

Answer:

A. One kind of atom

Explanation:

Answer:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore they rarely react with other elements since they are already stable

By utilizing microwave heating in the Fischer esterification reaction, researchers can achieve shorter reaction times, higher yields, and improved reaction efficiency compared to traditional heating methods.

“Heating” is a traditional technique known to humanity. It has been everchanging the way we live. There are an innumerable ways in which we have been generating heat and using the heat to do work. One of the key applications of “heat” has been the Industrial Process Applications.

One reaction that may be made more efficient using microwave (MW) heating is the synthesis of esters through the Fischer esterification reaction.

In the Fischer esterification, an alcohol reacts with a carboxylic acid in the presence of an acid catalyst to form an ester. The traditional heating method for this reaction involves refluxing the reaction mixture for several hours to achieve reasonable yields.

Using microwave heating in the Fischer esterification reaction can significantly reduce the reaction time and increase the reaction efficiency. MW heating provides rapid and efficient heating by directly transferring energy to the reactants, resulting in faster reaction rates and higher yields.

The MW heating method allows for more precise temperature control and selective heating of the reaction mixture. It can also promote better mixing and faster mass transfer, which enhances the reaction kinetics and reduces the formation of undesired by-products.

Overall, by utilizing microwave heating in the Fischer esterification reaction, researchers can achieve shorter reaction times, higher yields, and improved reaction efficiency compared to traditional heating methods.

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Electron and proton attract each other.

Two electrons will repel each other.

An electron is a negatively charged subatomic particle that can be either sure to an atom or free (no longer certain). An electron this is certain to an atom is one of the three primary varieties of particles inside the atom -- the other  are protons and neutrons. collectively, electrons, protons and neutrons shape an atom's nucleus.

A proton is a subatomic particle observed inside the nucleus of each atom. The particle has a positive electric price, same and opposite to that of the electron. If remoted, a single proton could have a mass of best 1.673 ? 10-27 kilogram, simply barely much less than the mass of a neutron.

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Answer:

4 moles of HCl will be required to produce 2 moles of H2.

Explanation:

A balanced chemical equation gives the stoichiometric ration of moles of reactants required to produce a certain number of moles of products. The ratio of moles of reactants to moles of products is known as the mole ratio and is constant for a given chemical reaction.

In the given balanced equation of reaction shown below:

Zn + 2HCl → ZnCl2 + H2

The mole ratio of HCl and H2 is 2:1. This means that in this reaction between Zinc metal and hydrochoric acid to produc zinc chloride and hydrogen gas, every two moles of hydrochloric acid used in the reaction will result in the production of one mole of hydrogen gas.

Therefore for two moles of H2 to be obtained from the reaction, twice the number of moles of HCl is required.

Moles of HCl required = 2 × 2 moles = 4 moles of HCl.

Answer:

coz it doesn't meet the three criteria the iau uses to define a full sized planet

Explanation:

it meet all other except one :has no cleared its neighboring region of other object

Answer:

thhe anwer is d

Explanation:

the answer is d just took the quiz got 100 on edge 2022

Answer:

1.2 M

Explanation:

If you use the dilution equation (M1V1=M2V2), you end up with (50)(12)=(500)(M2), and when you solve for M2 you get 1.2 M.