Ethylene is burned with 33% excess air. the analysis of the dry base combustion products indicates the presence of 6.06% of 2 by volume. the rest of the results have been lost. what percent of the carbon in the fuel has been converted to instead of 2?

Answer:

The correct answer is - 1/4096.

Explanation:

In the starting, there is that the number of atoms is  N 0 .

The number of half-lives in this case, = 300/ 25 = 12

After the first half-lives or 25 days,  N 1 = N 0 /2

the half life is that time where half of the sample had decay.

After the second half-life or 50 days,  N 2 = N 1 /2  = N 0 /4 .

There is division by two the original amount, then after four times you divide four times for  2  that means that you divide by  2 ^12  =4096 .

So the final amount remain is  N 12 = N 0 /4096  or 1/4096.

hope that helps or not.

The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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The oxidation reduction reaction are given below.

Oxidation half reaction:

Zn° →Zn² + 2e-

Reduction half reaction:

2Mn^5 +4e^- → 2Mn^2+

Belo w are the oxidation and reduction reaction of the common alkaline batteries to produce electricity.

Oxidation half reaction:

Zn° →Zn² + 2e-

Reduction half reaction:

2Mn^5 +4e^- → 2Mn^2+

To balance the overall reaction, we need to multiply each half reaction by appropriate coefficients to ensure that the electrons cancel out.

Here is the balance overall reaction.
2Zn° + 2Mn^5 → 2Zn² + 2Mn²+

The balanced equation shows that in alkaline batteries, zinc metal is oxidized to form zinc ion, while manganese ions are reduced to manganese(II) ions. The oxidation reduction reaction    generate an electric current as a result of the flow of electrons.

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Answer:

The mean value theorem tells us the average velocity must be between the minimum velocity and the maximum velocity. The only way it can be either the minimum or the maximum is if velocity is constant. So of course instantaneous velocity can be greater and can be less.

Explanation:

Assuming the solution is taken in 1 L volume so that the number of moles of AgNO₃ with 10.6 g or two spoon is 0.062 moles. Thus the concentration of the solution is 0.06 molar.

Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters. Molarity is a temperature dependent quantity. This is the most common term for concentration of a solution.

The molar mass of AgNO₃ is 169.9 g/mol. One tea  spoon silver nitrate is 5.3 g thus, two tea spoon is 10.6 g. The number of moles of 10.6 AgNO₃

= mass/weight

= 10.6 g / 169.9 g/mol

= 0.062 moles.

Thus the concentration of 0.062 moles in 1 L solution is 0.062 molar.

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SF₆

Molar mass: 146.06 g/mol

mole = 25 : 146.06 = 0.171

molecules:

=0.171 x 6.02 x 10²³

=1.03 x 10²³

Answer:

C

Explanation:

I hope it help

It help you mixed up

Answer:

the 3rd option. negative feedback loops are initiated during childbirth.

Answer:

Option B is correct = 1,3

Explanation:

Chemical equation:

C₂H₄ + O₂     →    CO₂ + H₂O

Balanced chemical equation:

C₂H₄ + 3O₂     →    2CO₂ + 2H₂O

Step 1:

Left side                      Right side

C = 2                           C = 1

H = 4                           O = 3

O = 2                           H = 2

Step 2:

C₂H₄ + O₂     →    2CO₂ + H₂O

Left side                      Right side

C = 2                           C = 2

H = 4                           O = 5

O = 2                           H = 2

Step 3:

C₂H₄ + O₂     →    2CO₂ + 2H₂O

Left side                      Right side

C = 2                           C = 2

H = 4                           O = 6

O = 2                           H = 4

Step 4:

C₂H₄ + 3O₂     →    2CO₂ + 2H₂O

Left side                      Right side

C = 2                           C = 2

H = 4                           O = 6

O = 6                           H = 4

Between OH and C=O, the strong nucleophile is OH and the strong electrophile is C=O.

1. OH (hydroxide ion) is a strong nucleophile because it has a negative charge on the oxygen atom, which allows it to donate its lone pair of electrons to an electrophilic center.
2. C=O (carbonyl group) is a strong electrophile because the carbon atom has a partial positive charge due to the electronegativity difference between carbon and oxygen atoms in the double bond. This makes the carbon atom highly susceptible to nucleophilic attack.

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The correct answer is A. "N₂" represents two nitrogen atoms that have formed a molecule.

N₂ refers to a diatomic molecule composed of two nitrogen atoms bonded together by a strong triple covalent bond. Nitrogen (N) is an element with an atomic number of 7, meaning it has seven protons in its nucleus.
Each nitrogen atom has five valence electrons in its outermost electron shell. To achieve a stable electron configuration, two nitrogen atoms can share three pairs of electrons, resulting in the formation of the N₂ molecule.
Option B is incorrect because compounds are formed when different elements combine chemically, whereas N₂ consists of only one element, nitrogen. Option C is incorrect because the atomic number of nitrogen is 7, not 2. Option D is incorrect because the atomic mass of nitrogen is approximately 14 atomic mass units (AMU), not 2.
Therefore, N₂ represents two nitrogen atoms that have bonded together to form a molecule, which is the most accurate description among the given options.

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Answer:

Hey mate.....

Explanation:

This is ur answer........

For example, the communications industry includes all of the physical and social systems that produce books, newspapers, magazines, radio and television broadcasts, billboard advertisements, Internet websites, telephones, and telecommunications, such as the GPS.

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We need 0.125 moles of LiCl to make a 0.50 M solution in 0.250 L of solution.

The volume of solution = 0. 250 L

Molarity of solution = 0. 50 M

A mole is described as the quantity of a substance that includes as many particles that are bonded together in a compound as there are atoms in exactly 12 g of carbon 12 isotope.

To find the number of moles of LiCl, we can use the formula:

moles of solute = concentration of solute * volume of solution

moles of LiCl = 0.50 mol/L x 0.250 L

moles of LiCl = 0.125 mol

Therefore, we can conclude that we need 0.125 moles of LiCl to make a 0.50 M solution in 0.250 L of solution.

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Size of an atom increases as we move down a group and from left to right across a period

Define an atom?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.

In a group, as the atomic number rises, the atomic size expands from top to bottom. Valence electrons are located farther from the nucleus because there are more filled energy levels, which increases atomic size.

Atomic size grows as a function of period number, number of shells, and so forth. Since there are more electrons in each shell as we move from left to right in a period, the force of attraction between the nucleus and electrons, which have positive charges, is stronger, bringing the shells closer to the nucleus and shrinking the size of the atom.

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Lead has 82 protons and 82 electrons.

Lead, with an atomic number of 82, indicates the number of protons in its nucleus. Therefore, lead has 82 protons. Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Consequently, lead also has 82 electrons.

The protons, located in the nucleus, carry a positive charge, while the electrons, which orbit around the nucleus, carry a negative charge. The equal number of protons and electrons ensures that the overall charge of a lead atom is neutral.

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Answer:

Metals , silver and copper which allows to pass the electricity through it is called good conductor of electricity .

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Answer:

0.251 L

Explanation:

c (concentration) = n(moles)/v(volume in litres)

0.995 M = 0.25 mol / v

v = 0.25 mol / 0.995 M

v = 0.251 L

Answer:

reluctantly she pulled away, her pulse and respiration in a race.

its function is less that of respiration that of FIG.

the least wind raises clouds of fine dust, which fill the air, render it so opaque as to obscure the noonday sun, and make respiration difficult.

There is 5 orbitals!

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Answer:

1) 9.4 mol

2) 0.6 mol

3) 0.9 mol

What is Stoichiometry?

In chemical equations, unless stated otherwise, the reactants and products will theoretically always remain in stoichiometric ratios.

The stoichiometry of a reaction is the relationship between the relative quantities of products and reactants, typically a ratio of whole integers.

Consider the following chemical reaction: aA + bB ⇒ cC + dD.

The stoichiometry of reactants to products in this reaction is the ratio of the coefficients of each species: a : b : c : d.

Converting between moles and mass:

To convert from mass to moles, divide the mass present by the molar mass, resulting in the number of moles. Mathematically, the units present themselves like this: \(\frac{g}{gmol^{-1}} =g(g^{-1}mol)=mol\).

Thence, the formula for moles: n = m/M, where n = number of moles, m = mass present, and M = molar mass. This formula can be easily rearranged to find mass present from molar mass and moles, or molar mass from mass and moles.

1) For the reaction C + 2H₂ → CH₄, how many moles of carbon are needed to make 150.6 g of methane, CH₄? (Molar Masses: H=1; C=12)

Stoichiometry of carbon to methane = 1 : 1.

Therefore, moles of CH₄ = moles of C. Using the formula to find moles, n(CH₄) = m/M = 150.6/(12+1×4) =9.4125 ≈ 9.4 mol

Therefore, we require 9.4 moles of carbon.

2) S + 6HNO₃ → H₂SO₄ + 6NO₂ + 2H₂O

In the above equation, how many moles of water can be made when 113 g of HNO₃ are consumed? (Molar Masses: H=1; N=14; S=32; O=16)

Stoichiometry of Nitric acid to water = 6 : 2 = 3 : 1. Therefore, we produce 1 mole of water for every 3 moles of nitric acid consumed. Hence,  n(HNO₃) = m/M = 113/(1+14+16×3) = 1.79365 mol

Therefore: n(H₂O) = 1/3 × n(HNO₃) = 0.59788 mol ≈ 0.6 mol

3) 3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 2NO + 4H₂O

In the above equation, how many moles of water can be made when 117.8 grams of HNO3 are consumed?

Stoichiometry of Nitric acid to water = 8 : 4 = 2 : 1. Therefore, we produce 1 mole of water for every 2 moles of nitric acid consumed. Hence,  n(HNO₃) = m/M = 117.8/(1+14+16×3) = 1.86984 mol

Therefore: n(H₂O) = 1/2 × n(HNO₃) = 0.9349 mol ≈ 0.9 mol

At a constant pressure, the gas occupies a volume of 500 ml when the temperature is increased to 250k.

At a constant pressure, the volume of a gas is directly proportional to its temperature. This relationship is known as Charles' Law. According to the problem, the sample of gas occupies 420 ml at a temperature of 210k. We need to find out the volume of the gas when the temperature is increased to 250k.

To solve this problem, we can use the formula V1/T1 = V2/T2, where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume, and T2 is the final temperature. Plugging in the given values, we get:

420 ml/210k = V2/250k

Simplifying this equation, we get:

V2 = (420 ml/210k) x 250k
V2 = 500 ml

Therefore, at a constant pressure, the gas occupies a volume of 500 ml when the temperature is increased to 250k.

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The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is C₆H₇O₃.

The empirical formula gives the proportions of the elements present in a compound.

In this compound proportion od carbon, hydrogen and oxygen atoms is:

n(C) : n(H) : n(O) = 12 : 14 : 6 /÷2; in this example, molecular formula is divided by two

n(C) : n(H) : n(O) = 6 : 7 : 3

In the empirical formula, the proportion od carbon, hydrogen and oxygen atoms is 6 : 7 : 3, so the empirical formula is C₆H₇O₃.

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The energy of the metal d orbitals distributing a charge of −6 due to an increase in electrostatic repulsion.

What is crystal field theory?

The ability of transition metals to form complexes is a key property. A complex is made up of a core metal atom or ion surrounded by a number of ligands. Crystal field theory governs the interaction of these ligands with the core metal atom or ion.

Crystal field theory was developed in 1929 and treats the interaction between metal ion and ligand as a purely electrostatic phenomena, with the ligands seen as point charges in the region of the central atom's atomic orbitals. Crystal field theory was developed and extended to account for the partly covalent character of bonding between ligands and metal atoms, primarily through the application of molecular orbital theory.

To accurately grasp the crystal field interactions in transition metal complexes, knowledge of the geometrical or spatial distribution of d orbitals is required. In a free gaseous metal ion, the d-orbitals are fivefold degenerate. If a spherically symmetric field of negative ligand filled charge is imposed on a central metal ion, the d-orbitals remain degenerate but the energy of the free ion changes.

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Answer:

Yes

Explanation:

Some bacteria is good for you like the bacteria in your digestive system, which helps with breaking down food and keeping you healthy

Answer:

Mass = 63.19 g

Explanation:

Given data:

Number of moles of Cl₂ = 0.89 mol

Mass in gram = ?

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of Cl₂ = 71 g/mol

by putting values,

Mass = 0.89 mol × 71 g/mol

Mass = 63.19 g

The most efficient approaches to minimize nitrate pollution of rivers are to utilize biofertilizers instead of synthetic nitrogen fertilizers or to reduce their use altogether, in farming.

What is Nitrate pollution?

Groundwater and rivers may become contaminated with nitrogen from a variety of sources. The environment naturally contains a certain amount of nitrogen, and small amounts of nitrate are essential nutrients. However, there is an issue with the high nitrate levels found in significant anthropogenic contributions such as sewage, animal waste, nitrogen-based fertilizers, agricultural runoff, and fertilizers.

What are Biofertilizers?

A biofertilizer is a substance that contains living microorganisms that, when added to soil, seeds, or plant surfaces, colonize the plant's rhizosphere and encourage growth by boosting the supply or availability of essential nutrients to the host plants.

Hence, the most efficient approaches to minimize nitrate pollution in rivers are to utilize biofertilizers.

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The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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Answer:

P₂ =  50 mmHg

Explanation:

Given data:

Initial volume of gas = 80 mL

Initial pressure of gas = 100 mmHg

Final volume = 160 mL

Final pressure = ?

Temperature = constant

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

100 mmHg × 80 mL = P₂ × 160 mL

P₂ = 8000 mmHg. mL/ 160 mL

P₂ =  50 mmHg