Given the unbalanced reaction: NH3 + O2 N2 + H2O. When properly balanced, the sum of the balancing coefficients is 8. 12. 15. 14.

Answer:

D. CI

Explanation:

a p e x

Chlorine is the element which is not conserved in the given chemical equation AgNO\(_3\) + CaCl\(_2\) → AgCl + CaNO\(_3\). The correct option is option D.

An equation per a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In a nutshell, the two components of the reaction have an equal balance of mass and charge.

The components and byproducts of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified. Chlorine is the element which is not conserved in the given chemical equation AgNO\(_3\) + CaCl\(_2\) → AgCl + CaNO\(_3\).

Therefore, Chlorine is the element which is not conserved in the given chemical equation AgNO\(_3\) + CaCl\(_2\) → AgCl + CaNO\(_3\). The correct option is option D.

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The presence of the two double bonds in linoleic acid increases the number of electron carriers produced during beta oxidation, which ultimately leads to the production of more ATPs.

In beta oxidation of linoleic acid, the cost in total ATPs is higher compared to the saturated carbon chain stearic acid. Linoleic acid has two double bonds, which means that it requires two more rounds of beta oxidation compared to stearic acid, which only requires one. During each round of beta oxidation, one molecule of FADH2 and one molecule of NADH are produced, which can be used to generate ATP through oxidative phosphorylation. Therefore, stearic acid produces two electron carriers in one round of beta oxidation, while linoleic acid produces only one.
Since stearic acid only requires one round of beta oxidation, it produces two electron carriers (FADH2 and NADH) and generates a net of 8 ATPs through oxidative phosphorylation. On the other hand, linoleic acid requires two rounds of beta oxidation, which produces a total of four electron carriers (two FADH2 and two NADH). These four electron carriers can generate a net of 18 ATPs through oxidative phosphorylation.
Therefore, the presence of the two double bonds in linoleic acid increases the number of electron carriers produced during beta oxidation, which ultimately leads to the production of more ATPs. However, the cost of beta oxidation is higher for linoleic acid compared to stearic acid due to the additional rounds required.

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Out of the compounds listed below, the compound in which oxygen has an oxidation number other than −2 is H₂O₂. The correct option is (d)H₂O₂.

Oxidation number can be described as the number that is given to an atom of an element when it combines with other atoms. It is assigned to an atom of an element in a particular compound, which shows its ability to either donate or accept electrons when it reacts with other atoms.

The oxidation number of an atom in a molecule indicates the electron sharing that occurs in chemical bonds. The general rules for determining the oxidation number of an atom are: In an uncombined or elemental state, atoms have an oxidation number of 0.

Ions' oxidation numbers are the same as their charges. Oxygen in most of the compounds has an oxidation state of -2 except in peroxides, where it has an oxidation state of -1. In H₂O₂, the oxygen atoms have an oxidation number of -1. Hence, H₂O₂ is the only compound from the given options where oxygen has an oxidation number other than −2. Hence, d is the correct option.

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The affect of ground water depletion is Lower water level, Loss of vegetation and Wildlife disruption.

The amount of water that is present below the upper surface area of the land, which are not easily accessible is known as ground water.

And this ground water keeps the soil hydrated and responsible for good vegetation by providing many minerals through water, wildlife is also depends on the ground water as they provide survival for many species. If the ground water is deplected then it also affects the flow of streams and lower water level.

Hence option (d) is correct i.e. All of the above.

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Answer

D. All of the above

Explanation

According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus is specific allowed orbits.

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The reference for the article titled "Two-dimensional non-volatile programmable p-n junctions" published in Nature Nanotechnology in 2017, authored by Li, D.; Chen, M. Y.; Sun, Z. Z.; Yu, P.; Liu, Z.; Ajayan, P. M.; Zhang, Z. X. is:

Li, D., Chen, M. Y., Sun, Z. Z., Yu, P., Liu, Z., Ajayan, P. M., Zhang, Z. X. (2017). Two-dimensional non-volatile programmable p-n junctions. Nature Nanotechnology, 12, 901-906.

The article titled "Two-dimensional non-volatile programmable p-n junctions" was published in the journal Nature Nanotechnology in 2017. The authors of the article are Li, D.; Chen, M. Y.; Sun, Z. Z.; Yu, P.; Liu, Z.; Ajayan, P. M.; Zhang, Z. X. The article focuses on the development of two-dimensional (2D) non-volatile programmable p-n junctions. These junctions have the ability to switch between p-type and n-type conductivity, enabling programmable control over electronic devices. The authors present experimental results and discuss the potential applications of these 2D non-volatile programmable p-n junctions in electronic devices and integrated circuits. The reference provides the necessary information to locate and refer to the article for further reading and citation purposes.

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The complete question is

What is the reference for the article titled "Two-dimensional non-volatile programmable p-n junctions" published in Nature Nanotechnology in 2017, authored by Li, D.; Chen, M. Y.; Sun, Z. Z.; Yu, P.; Liu, Z.; Ajayan, P. M.; Zhang, Z. X.?

Answer:

Fats that are tightly packed with no double bonds between the fatty acids are called saturated fats.

Explanation:

Answer:

1:loses or gains energy

Answer: a) Table Salt

good luck

The required volume flow rate of liquid ethyl alcohol to supply at a rate of 2000 kJ/s is approximately 164.9 L/min.

To determine the required volume flow rate of liquid ethyl alcohol, we need to calculate the fuel flow rate first. Then, we can convert it to volume flow rate.

Given:

Rate of energy release (Q) = 2000 kJ/s

Excess air = 40% (or 0.4)

First, let's calculate the fuel flow rate (m f):

Q = m f × Lower Heating Value (LHV)

The Lower Heating Value (LHV) for ethyl alcohol can be calculated using the enthalpy of vaporization:

LHV = enthalpy of vaporization / molecular weight of fuel

LHV = 42,340 kJ/k mol / 46.07 kg/k mol = 920.11 kJ/kg

Now, we can calculate the fuel flow rate:

m f = Q / LHV

m f = 2000 kJ/s / 920.11 kJ/kg ≈ 2.173 kg/s

Next, let's convert the fuel flow rate to volume flow rate:

Volume flow rate (V f) = m f / density

V f = 2.173 kg/s / 790 kg/m³ = 0.002749 m³/s

Finally, we can convert the volume flow rate to L/min:

V f = 0.002749 m³/s × (1000 L/1 m³) × (60 s/1 min) ≈ 164.9 L/min

Therefore, the required volume flow rate of liquid ethyl alcohol to supply at a rate of 2000 kJ/s is approximately 164.9 L/min.

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A material that tranmits nearly all the light in a ray because it offers little resistance to light is called Translucent.

The following characteristics can cause translucency :

Thus, material that tranmits nearly all the light in a ray because it offers little resistance to light is Translucent material.

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Answer:

Density, D = 2g/cm^3

Explanation:

Given the following data;

Length = 2cm

Width = 3cm

Height = 2cm

Mass = 24g

Density = ?

Volume of a rectangular solid (V) = Length × Weight × Height

Therefore, V = L× W × H

Substituting the values, we have;

\(V = 2 *3 * 2 = 12\)

V = 12cm

Density can be defined as the ratio of mass to volume i.e mass all over volume.

Mathematically, \(Density = \frac{Mass}{Volume}\)

\(D = \frac{M}{V}\)

Substituting the values, we have;

\(D = \frac{24}{12}\)

Density, D = 2g/cm^3

Hence, the density of the rectangular solid is 2g/cm^3.

Answer:

The combustion of hydrogen–oxygen mixtures is used to produce very high temperatures (approximately 2500 °C) needed for certain types of welding operations. Consider the reaction to be

H2(g)+1/2O2(g)=H2O(g)

change in enthalpy is -241.8 kJ

What is the quantity of heat evolved, in kilojoules, when a 160  g mixture containing equal parts of  H2 and O2 by mass is burned?

Explanation:

i hope this help sorry if it does not ok bye luv!!!

This problem is asking for the electronegativity differences and polarity for the bonds formed between and K and F, and N and O. At the end, the results are 3.16 and ionic, and 0.40 and covalent, respectively.

In chemistry, chemical bonds are formed when elements either share or gain electrons. Once they form the bond, one can tell much of the properties of the resulting compound based on the type of bond formed.

In such a way, one can evidence de formation of covalent and ionic bonds, the former exhibited when the electronegativity difference is between 0 and about 1.6 and the former beyond 1.7.

In chemistry, electronegativity is the tendency of an atom to attract electrons in a molecule, thus, we have the following for K, F, N and O as required: 0.82, 3.98, 3.04 and 3.44, respectively.

In such a way, one can calculate the difference electronegativity for the pairs KF and NO as shown below:

K-F =3.98 - 0.82 = 3.16

N-O = 3.44 - 3.04 = 0.40

Hence, the K-F bond turns out ionic whereas the N-O, covalent.

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The force of gravity acting on the box is 1,500 N or 152.7 kg.

Force of gravity is the force that attracts two objects towards each other. The force of gravity acting on an object is directly proportional to its mass and inversely proportional to the square of the distance between the object and the center of the Earth.

The force of gravity can be calculated using the formula

Fg = mg,

where Fg is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity,

which is approximately 9.81 m/s2 near the surface of the Earth.

If the box weighs 1,500 N, then the force of gravity acting on the box would be

Fg = mg

    = (1,500 N)/(9.81 m/s2)

    = 152.7 kg.

Therefore, the force of gravity acting on the box is 1,500 N or 152.7 kg.

The force of gravity is an important concept in physics, as it affects everything on Earth. The gravitational force between two objects depends on their masses and the distance between them. The more massive the objects are, the greater the force of gravity between them. Similarly, the closer two objects are, the greater the force of gravity between them.

The force of gravity is also responsible for keeping the planets in orbit around the Sun and the Moon in orbit around the Earth. It is a fundamental force of nature that plays a crucial role in our understanding of the universe.

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The text discusses the issue of global warming caused by the release of greenhouse gases, primarily from human activities such as burning fossil fuels and deforestation. It highlights the potential consequences of rising temperature.

The greenhouse effect explains how heat is trapped at the Earth's surface by "greenhouse gases." You may think of these heat-trapping gases as a blanket keeping the Planet warmer than it otherwise would be.

Water vapour, carbon dioxide, methane, and other airborne gases all contribute to the greenhouse effect, which warms the Earth's surface and troposphere (lowest layer of the atmosphere).

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Answer:

Non point source pollution

Explanation:

Point source pollution is when any contaminant enter the environment from an easily from an easily identified and confined place.

Non point source pollution is pollutants released in a wide space. Including oil, grease, and toxic chemicals.  

True. It would take more energy to boil water( which is polar) than to boil a liquid made of non-polar molecules.

Thus we can conclude that it takes more energy to boil water than to boil a liquid made of non-polar molecules.

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The gland that can be precisely controlled, and its amount of secretion and the area of the body involved can be varied independently is the **sweat gland**.

Sweat glands are distributed all over the body and are controlled by the autonomic nervous system. The amount of sweat secreted and the area of the body involved can be regulated by the sympathetic nervous system, which is responsible for the "fight or flight" response. This means that the body can vary the amount of sweat produced in different areas of the body depending on the situation, such as in response to exercise or heat. The secretion of sweat is also under hormonal control, with hormones such as adrenaline and cortisol increasing sweat production. Overall, sweat glands play an important role in regulating body temperature and maintaining homeostasis.

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Answer:

Low pressure ; stormy

Explanation:

In obtaining the rate of reaction for the reaction of sodium metal and water;

a) -0.005 g/s

b) 0.000217 mol/s

c) 0.00025 g/s

d) 0.0001084  mol/s

The term rate of reaction has to do with the rate at which the reactants are changed to become products or the rate at which the products are seen to appear.

a)  The average rate of decrease of the sodium in g/s is;

Mass of sodium/ time taken

= -(0.075 g / 15  s) = -0.005 g/s

b) The average rate of decrease of the sodium in mol/s;

Number of moles of sodium = 0.075 g/23 g/mol = 0.00326 moles

Given that;

Number of moles/ time taken

= 0.00326 moles/15 s

= 0.000217 mol/s

Given that the reaction equation is;

\(2Na(s) + 2H_{2} O(l) ---- > 2NaOH(aq) + H_{2}(g)\)

c) The average rate of production of hydrogen in g/s = 1/2 * 0.005 g/s

= 0.00025 g/s

d) The average rate of production of hydrogen in mol/s;

1/2 * 0.000217 mol/s

= 0.0001084  mol/s

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Answer:

Food in the stomach that is high in protein will dilute absorption of alcohol in your stomach :) therefore always drink with food in your stomach, just drinking alchol without food will have serious consequences on helath.

Explanation:

A double-displacement reaction, also known as a double-replacement or metathesis reaction, can be identified by the formation of a precipitate, gas, or water. These observable changes indicate that a chemical reaction has occurred.

In a double-displacement reaction, the positive ions of two different compounds switch places, resulting in the formation of two new compounds. If one of the products formed is an insoluble compound, a precipitate will appear in the solution, indicating that the reaction has taken place.

Furthermore, if one of the products is a gas, such as carbon dioxide (CO2), hydrogen gas (H2), or chlorine gas (Cl2), the formation of bubbles or a noticeable gas evolution suggests a double-displacement reaction.

Another indication is the formation of water (H2O) as a product. This can occur when an acid and a base react, resulting in the formation of water and a salt.

In summary, the formation of a precipitate, gas, or water during a chemical reaction is an observable clue that a double-displacement reaction has occurred. These changes in physical properties provide evidence of the rearrangement of ions between compounds, leading to the formation of new substances.

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In a double-displacement reaction, also known as a metathesis or exchange reaction, the key indicator of the reaction having occurred is the formation of a precipitate, gas, or molecular compound.

Here are the main observations that indicate a double-displacement reaction:

1. Formation of a Precipitate: If a solid (precipitate) forms when two aqueous solutions are mixed, it suggests that a double-displacement reaction has taken place. The exchange of ions between the two reactants leads to the formation of an insoluble product.

2. Formation of a Gas: If a gas is evolved during the reaction, such as the release of bubbles or effervescence, it indicates a double-displacement reaction. The gas is usually a product of the reaction, formed by the exchange of ions.

3. Formation of a Molecular Compound: In some cases, a double-displacement reaction can result in the formation of a molecular compound, such as water or an acid. This occurs when the positive and negative ions from the reactants combine to form a new compound.

Therefore, it is important to note that not all double-displacement reactions exhibit all of these indicators. The presence of any one of these signs confirms that a reaction has occurred, demonstrating the characteristic nature of a double-displacement reaction.

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The monobrominated compounds produced when 2-propyl-1-pentene is treated with NBS and UV light irradiation are the compounds that contain a bromine atom bonded to a single carbon atom within the 2-propyl-1-pentene molecule.

When 2-propyl-1-pentene undergoes bromination using NBS (N-bromosuccinimide) and UV light, the reaction occurs via a radical mechanism. This leads to the substitution of a hydrogen atom with a bromine atom, resulting in the formation of monobrominated compounds.

To determine the specific monobrominated compounds and their stereoisomers, it is necessary to analyze the structure of 2-propyl-1-pentene and consider the possible sites of bromination. 2-propyl-1-pentene has multiple carbon atoms that could potentially undergo bromination, leading to different structural isomers.

By introducing a bromine atom at various positions within the 2-propyl-1-pentene molecule, different monobrominated compounds can be formed. These compounds may exhibit stereoisomerism if there are chiral centers present in the original molecule.

To provide a comprehensive answer, the specific structures of the monobrominated compounds and their stereoisomers resulting from the reaction would need to be analyzed and described.

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Answer: Argon-52

Explanation: Its B

Answer:

B. in space because it is a lot more colder in space then Mt. Everst

The statement " nutrition is the acquisition of chemical substances by organisms for use as an energy source or as building blocks of cellular structures" is true.

Nutrition is indeed the acquisition of chemical substances by organisms for use as an energy source or as building blocks of cellular structures. Organisms require various nutrients, including carbohydrates, proteins, fats, vitamins, minerals, and water, to carry out their metabolic processes, maintain growth and development, and support overall health and well-being.

These chemical substances obtained through nutrition are utilized by organisms to provide energy for cellular processes, such as respiration, synthesis of biomolecules, and movement. They also serve as building blocks for the construction and repair of cellular structures, including proteins, nucleic acids, lipids, and carbohydrates.

Nutrition is a fundamental process that ensures the availability of essential nutrients for organisms to carry out their life functions effectively. Different organisms have varied nutritional requirements depending on their specific metabolic needs, lifestyles, and physiological characteristics.

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The question requires us to choose the best option to explain why bubbles rise faster from a warm can of soda than a cold can, based on the solubility of gases in liquids.

Adding heat to a solution composed of a liquid and a gas (i.e., increasing its temperature) provides thermal energy to the gas that makes it possible to overcome the forces that maintain molecules of solvent (liquid) and solute (gas) together. In this way, the molecules of solvent and solute tend to separate, therefore decreasing the solubility of the gas. Based on this, we can say that the solubility of gases in liquids increase with increasing temperature.

Therefore, the best option to answer the question is the first one, "gases become less soluble in liquids at higher temperatures".

Answer:

The reactants of photosynthesis are carbon dioxide and water.

The missing variable of (⁻¹) is bromine.

Let the missing variable be X.

No. of electrons in the monoatomic anion (X⁻¹ )= 36

No. of electrons in the monoatomic atom (X) = 35

Atomic No. = No. of protons = No. of electrons in neutral atom = 35

Mass No. = No. of protons + No. of neutrons

               = 35 + 45 = 80

Hence, the element must be Br as its mass no is 80 and atomic no is 35.

And the ion is bromide ion or Br⁻¹ ion. It is an anion which gains an electron to achieve octet.

X → Br and X⁻¹ → Br⁻¹

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