Please help ASAP. No one could not help me with this question.

Answer: D. Fusion reactions in the sun convert small amounts of mayter into large amounts of energy.

There are vacant orbitals on the phosphorus atom that allows it to expand its octet.

There is a concept that we would need to consider as we are answering the question that we here and that is the idea of the octet rule. The octet rule states that it is only about eight electrons that can be found on the outermost shell of an atom and as such all of the compounds can be formed in obedience to this rule.

Now we should know that there are no vacant d orbitals that are present on the nitrogen atom and this stems from the fact that it does not have a 3d level as such there are no orbitals that can be able to help the Nitrogen atom so as to be able to expand its octet. This is the reason why its pentafluoride can be easily formed.

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The hydrogen atom produces the spectrum whenever the transition occurs. It is the emission spectrum which gives the bright line spectrum.

The emission spectrum of a chemical element or compound is defined as the spectrum of frequencies of electromagnetic radiation emitted as a result of the transition of an atom or molecule from a high energy state to a lower energy state.

The electrons of hydrogen atom absorb energy and get excited. They jump from a lower energy level to a higher energy level and emit radiation when they return to their ground states.

Thus the bright lines are produced due to the transitions.

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Answer:

there u go

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 9.033×10²³ is the number of molecules in 1.500 mole of H\(_2\)O.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

number of moles =1.500 mole

substituting all the given values in the above equation, we get

number of atoms/molecules=1.500  × 6.022×10²³(Avogadro number)

number of atoms/molecules =9.033×10²³molecules

Therefore, 9.033×10²³ is the number of molecules in 1.500 mole of H\(_2\)O.

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Answer:

she musty

Explanation:

A)Nuclear fusion releases protons and neutrons, so the total number of protons and neutrons in a star changes throughout its life is the true statement.

A suggested method of producing energy would use heat from nuclear fusion processes to produce electricity. A heavier atomic nucleus is created by the fusion of two lighter ones, which also produces energy. Fusion reactors are devices created to use this energy.

Nuclear fusion is less risky than nuclear fission because the fuel rods produced by nuclear fission include dangerous radioactive waste that may be used in weapons and must be maintained carefully for thousands of years.

Powering the Sun and other stars are nuclear fusion processes. Two light nuclei combine to produce one heavy nucleus during a fusion process. The resultant single nucleus's total mass is less than the mass, which causes the process to release energy.

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The sample that uses the substance that Jacob and Natalie should use to make a cold pack that will do the best job of keeping food cool is sample 2, because it absorbs the most energy (option B).

Endothermic refers to a chemical reaction that absorbs heat energy from its surroundings. This ensures that the temperature of the surroundings is cool or has a lower temperature.

According to this question, Jacob and Natalie are asked by their science teacher to design a warming or cooling device. They make use of certain substances, however, sample 2 has the lowest final temperature of -4°C.

This shows that sample 2 absorbs the most energy, hence, would be the best for keeping the food cool.

The incomplete question is as follows:

Jacob and Natalie are asked by their science teacher to design a warming or cooling device. They decide to design a cold pack that can be used to help keep food cool. Jacob and Natalie read about different substances that can be used inside cold packs and learn that most cold packs use endothermic reactions to cool objects.

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\(Na^+\), \(Ca^2^+\), \(F^-\), and \(S^2^-\) are monoatomic ions, while \(Cr^2^+\), \(Hg^2^+\), \(ClO^-\), \(OH^-\), NO3-, and ClO3- are polyatomic ions. H₂O is not an ion; it is a neutral molecule.

Monoatomic ions are ions formed from a single atom, while polyatomic ions are ions formed from a group of atoms bonded together. Let's classify each of the ions you provided:

Monoatomic ions:

- Na+ (sodium ion)

- Ca2+ (calcium ion)

- F- (fluoride ion)

- S2- (sulfide ion)

Polyatomic ions:

- Cr2+ (chromium(II) ion) - This ion should be Cr2+, indicating a two-positive charge on the chromium ion. It is typically found in compounds with ligands to stabilize its charge.

- Hg2+ (mercury(II) ion) - This ion is a polyatomic ion due to the presence of two mercury atoms bonded together.

- H₂O (water molecule) - This is not an ion; it is a neutral molecule consisting of two hydrogen atoms bonded to one oxygen atom.

- ClO- (hypochlorite ion) - This is a polyatomic ion consisting of chlorine and oxygen atoms.

- OH- (hydroxide ion) - This is a polyatomic ion consisting of one oxygen and one hydrogen atom.

- NO3- (nitrate ion) - This is a polyatomic ion consisting of one nitrogen and three oxygen atoms.

- ClO3- (chlorate ion) - This is a polyatomic ion consisting of one chlorine and three oxygen atoms.

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Monoatomic ions consist of a single atom, while polyatomic ions consist of more than one atom. For example, Na+ is monoatomic, while NO3- is polyatomic.

To classify ions as either monoatomic or polyatomic, you need to know the nature of these ions. Monoatomic ions are ions made up of a single atom, while polyatomic ions are made of more than one atom. For example, Na+ is a monoatomic ion because it consists of a single sodium atom. On the other hand, NO3- is a polyatomic ion because it consists of one nitrogen atom and three oxygen atoms.

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Answer:

D. Radiation from the sun

Explanation:

The main source of thermal energy for the earth is Sun. The sun is major source which provide heat energy and light energy to the earth. The sun converts almost 4 million tons of energy into electromagnetic radiations which is a source of thermal energy for Earth's Mantle.

According to the information provided, there are 8.601024 8.60 10 -24 ammonia molecules in a solution of water and ammonia (NH3 N H 3). The total number of hydrogen atoms inside the solution is 1.06 1026.

Water has the chemical formula H2O, which stands for two moles of hydrogen and one mole for oxygen. Consequently, there are two moles of hydrogen in a single water molecule. 18 g if water will have 1 x 12.046 1023 = 12.046 1023 hydrogen atoms.

According to Avogadro's number, there's many 6.022 x 1023 water molecules in a mole of water. After determining that a drop of water has 0.002775 moles, we can now calculate how so many molecules are present in it: molecules inside a water drop Equal (6.022 x 1023 particles) x 0.002275 moles.

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Answer:

it would go be in the middle where u put it

Explanation:

i hope this helps ^^

1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Answer:

C. Egg

Explanation:

has more higher concentration on water.

Answer: Trail 2

Explanation: Because it has a pressure of 1 atm

Answer:

I think the answer is B

Explanation:

Answer:

oxygen atom is a unstable atom so it gets attached to other oxygen atom sharing valance electrons to become stable

C is the right ans

Volume is is inversely proportional to pressure, the volume is doubled when the pressure is halved.

According to Boyle's law, the volume of a given mass of gas is inversely proportional to its pressure at constant temperature. Mathematically;

V ∝ 1/P

Now we are told in the question that the  pressure of an enclosed gas decreases to half its original value. Since the volume is is inversely proportional to pressure, the volume is doubled when the pressure is halved.

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The magnetic quantum number (ml) represents the orientation of the orbital in three-dimensional space the only possible value of the magnetic quantum number ml for a 1s electron is 0.

Quantum is the smallest possible unit of a physical quantity, such as energy or momentum. It is a fundamental concept in quantum mechanics, which is the branch of physics that deals with the behavior of matter and energy at the atomic and subatomic level.

The idea of quantization was first proposed by Max Planck in 1900, when he discovered that energy is emitted and absorbed in discrete units called "quanta" when studying the behavior of light and blackbody radiation. Later, this idea was extended to other physical quantities, such as the momentum and position of particles.

According to quantum mechanics, the behavior of particles and systems cannot be fully described using classical mechanics, which assumes that particles have definite positions and velocities at all times. Instead, the behavior of particles and systems is described using wave functions, which represent the probability of finding a particle at a given position and time.

The principles of quantum mechanics have important applications in many areas of physics, including atomic and molecular physics, condensed matter physics, and particle physics. They are also the basis.

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The birth weight of cats at the 90th percentile would be approximately 3.7 ounces. b. The birth weight of cats at the 10th percentile would be approximately 2.3 ounces.

There are three main methods of calculating weight:

1. Balance Beam Scale: A balance beam scale is an example of a mechanical weighing system. It uses a set of calibrated weights to measure the weight of an object.

2. Digital Scale: A digital scale uses an electronic or digital readout to display the weight of an object.

3. Calipers: Calipers are devices used to measure the distance between two points, such as thickness or diameter. They come in various sizes and shapes, depending on the type of measurement the user wants to take.

Birth weight is the weight of a baby at the time of birth. It is usually measured soon after delivery, with a special baby scale, though sometimes the baby's weight is estimated. The normal range of birth weight is anywhere between 5 lbs 8 oz and 10 lbs, though preterm or premature babies may be significantly lighter. A baby's birth weight is important because it can provide a clue to the baby's overall health. High birth weights may indicate an underlying medical condition, and low birth weights can be a sign of premature or difficult delivery and health risks associated with such a delivery.

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Answer:

C. and D.

Explanation:

As the problem states, a solution containing bromothymol blue would turn from blue into yellow whenever CO₂ gas is added to it.

Answer:

1. The core electrons are 10

2. The valence electrons are 8

Explaination:

Core electrons are electrons located in  the inner shells of and atom.

Valence electrons are electrons located on the outermost shell of an atom

From the question given above, we obtained:

Ar (18) => [Ne] 3s²3p⁶

Recall

Ne (10) => 1s² 2s²2p⁶

Therefore,

Ar (18) => [1s² 2s²2p⁶] 3s²3p⁶

From the above illustration,

Inner shell (core shell) => 1s² 2s²2p⁶

Outermost shell (valence shell) => 3s²3p⁶

1. Determination of the core electrons

Inner shell (core shell) => 1s² 2s²2p⁶

Core electrons = 2 + 2 + 6

Core electrons = 10

2. Determination of the valence electrons

Outermost shell (valence shell) => 3s²3p⁶

Valence electron = 2 + 6

Valence electron = 8

Answer:

10 core electrons

8 valence electrons

Explanation:

Answer:

hard and brittle

hope this helps you ☺️☺️

good night take care sweet dream

L, A, N, R, H, V, F, and E are probably on the peptide's solvent-exposed surface. These have side chains that are polar or charged. When a substance, person, or chemical comes into contact with a solvent, solvent exposure occurs.

In the above peptide sequence, the amino acid residues L (leucine), A (alanine), N (asparagine), R (arginine), H (histidine), V (valine), F (phenylalanine), and E are those most likely to be on the solvent-exposed surface (Glutamic acid). These residues often have polar or charged side chains that are exposed to the solvent and are present on the surface of proteins. While this is true, hydrophobic residues like I (isoleucine), W (tryptophan), M (methionine), and S (serine) are more likely to be buried inside the protein structure and shielded from solvent exposure. Due to their importance in protein-protein and protein-ligand interactions, the solvent-exposed residues have a significant impact on how proteins function.

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The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.

The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.

As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.

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The amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

To find the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C, we can use the equation Q = mcAT.
First, we need to find the value of m, which is the mass of the water in grams. In this case, it is given as 200 grams.
Next, we need to find the value of AT, which is the change in temperature in degrees Celsius.

This can be calculated by subtracting the initial temperature from the final temperature, which gives us 60 C - 20 C = 40 C.
The specific heat capacity of water, C, is given as 4.18 Joules per gram per degree Celsius.
Now we can plug in the values into the equation:
Q = mcAT
Q = (200 g) x (4.18 J/g°C) x (40°C)
Q = 33,440 J
Therefore, the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

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