Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4 (R = 1.096776×10^7 m^−1)

The statement "a glycosidic bond is a bond between the anomeric carbon of a carbohydrate and any other biological molecule" is true.A glycosidic bond is a type of covalent bond that forms between the anomeric carbon of a carbohydrate molecule and another molecule, such as another carbohydrate, a protein, or a lipid.

The anomeric carbon is the carbon atom in a carbohydrate molecule that was involved in the formation of the carbonyl group (C=O) during the cyclization of the sugar. The anomeric carbon can exist in two different configurations, alpha or beta, depending on the orientation of the hydroxyl group (-OH) attached to it. When the anomeric carbon reacts with another molecule, such as an alcohol or amine group of another carbohydrate, a glycosidic bond is formed.

Glycosidic bonds are important in the formation of complex carbohydrates, such as starch, glycogen, and cellulose, as well as in the synthesis of glycoproteins and glycolipids. The type of glycosidic bond formed between two carbohydrates can have significant implications for their biological function and the properties of the resulting molecule.

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Explanation:

Mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Something is physically impossible if  a) it violates the law of science

Hence, option a) it violates the law of science is the correct option.

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TLC means Thin Layer Chromatography. It is a method that can best be described as "Affinity-Based" used in the separation of compounds that are in a mixture.

Unreacted p-nitrobenzaldehyde is simply an organic aromatic compound that contains a nitro group para-substituted to an aldehyde. in this case, if it is unreacted, that means it is the same as before the chemical reation.

Note that the question is missing key information hence the general answer.

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Answer:Search ResultsBy simply wrapping wire that has an electrical current running through it around a nail, you can make an electromagnet. When the electric current moves through a wire, it makes a magnetic field. ... You can make a temporary magnet by stroking apiece of iron or steel (such as a needle) along with a permanent magnet.

Explanation:

Answer:

It is True

Explanation:

By simply wrapping wire that has an electrical current running through it around a nail, you can make an electromagnet. When the electric current moves through a wire, it makes a magnetic field. If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak.

Answer: 3

Explanation:

Answer:

no all protons in an element doesn't contain an identical number of neutrons . number of electrons and number of protons contain identical number but the number of neutrons may vary. for eg: protons and neutrons of hydrogen is 1 and 0 respectively whereas protons and neutrons of helium is 2 and 2 .

Answer:

Explanation:

When a flask is dipped in very hot water in a large beaker , the flask expands due to heat gain . As a result , level of water in tube fitted in flask goes down .

After some time , the water inside tube also become hot so it expands  . coefficient of volume expansion of water is more than coefficient of volume expansion of glass . Hence greater expansion takes place in the volume of water . It is due to this fact that water level in tube starts rising after some time of fall .

According to the research, the correct answer is that steam distillation the components of a mixture are separated by direct injection of steam while in fractional distillation vaporization and condensation occur successively.

It is a process that allows the separation of mixtures in the liquid phase into their individual components.

In this sense, fractional distillation requires a fractionating column and is used when the boiling points of the volatiles in the liquid mixture are below 80 °C.

On the other hand, steam distillation is used to purify or isolate the compounds whose boiling point is very high based on a steam separation.

Therefore, we can conclude that in steam distillation a current of water vapor is passed while in fractional distillation a vaporization and condensation of the volatile component is carried out.

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Answer: There are \(12.71 \times 10^{-9}\) moles present in \(2.11 \times 10^{14}\) molecules of LiBr.

Explanation:

According to the mole concept, there are \(6.022 \times 10^{23}\) molecules present in 1 mole of a substance.

Hence, moles in \(2.11 \times 10^{14}\) molecules of LiBr are calculated as follows.

\(Moles = \frac{2.11 \times 10^{14}}{6.022 \times 10^{23}}\\= 12.71 \times 10^{-9}\)

Thus, we can conclude that there are \(12.71 \times 10^{-9}\) moles present in \(2.11 \times 10^{14}\) molecules of LiBr.

Answer:

electrons

Explanation:

protons and neutrons are found in the nucleus while electrons are outside the nucleus

Answer:

A.A

Explanation:

I took the quiz and I got that answer

The name of the organic compound is 2-methyl pentane. The given organic compound is a five-carbon system with a substitution at the C-2 carbon. The naming of an organic compound is done according to the rules given by IUPAC.

The given organic compound has 5 carbon in its main chain. So It has the root word Pent. Since, all the bonds are single bonds, the organic compound is saturated, hence it has the suffix -ane. Hence the unsubstituted straight chain is pentane.

Numbering is done from right to left, because when the numbering is from right to left, the substituted carbon gets C-2, when it is numbered from left to right, the substituted carbon gets C-4. So the numbering is from the right and the substituted carbon is C-2. The substituent is a single carbon system, a methyl substituent. So the organic compound is named 2-methyl pentane .

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Explanation:

The number of electrons, in turn, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element

Answer:

Question 1: (A)

The number of electrons determine the chemical properties of an atom.

Question 2:  (C)

Test tube cannot measure the volume of liquids rather they are used in chemical reactions

Question 3: (D)

Pauli's Exclusion Principle states that no two electrons in the same atom can have identical values for all four of their quantum numbers.

Answer:

The volume is 20.3

Explanation:

The percent by mass of nitrogen in ammonium sulfate is approximately 21.2%.

The formula for ammonium sulfate is (NH₄)₂SO₄. To determine the percent by mass of nitrogen, we need to calculate the molar mass of nitrogen and the molar mass of ammonium sulfate.

Nitrogen (N) has an atomic mass of approximately 14.01 g/mol. Ammonium sulfate contains two nitrogen atoms, so the total molar mass of nitrogen in ammonium sulfate is 2 * 14.01 g/mol = 28.02 g/mol.

The molar mass of ammonium sulfate is calculated by adding the atomic masses of its constituent elements: 2 * (atomic mass of hydrogen) + 4 * (atomic mass of nitrogen) + (atomic mass of sulfur) + 4 * (atomic mass of oxygen).

Using the atomic masses from the periodic table, we find:

2 * (1.01 g/mol) + 4 * (14.01 g/mol) + 32.07 g/mol + 4 * (16.00 g/mol) = 132.14 g/mol.

To find the percent by mass of nitrogen, we divide the molar mass of nitrogen by the molar mass of ammonium sulfate and multiply by 100:

(28.02 g/mol / 132.14 g/mol) * 100 ≈ 21.2%.

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While performing bag- mask ventilation with oxygen connected with the oxygen flow at 15 L / Min, then it will provide 90 tp 95% of oxygen.

In the Bag-valve-mask ventilation,  Bag valve mask devices are the preferred equipment to deliver positive pressure ventilation to the apneic patient.  Every dental office must have the ability to deliver oxygen with positive pressure. This may be accomplished with either oxygen-powered resuscitators bag valve mask devices. During positive pressure ventilation, there is always a significant risk for gastric distention and subsequent regurgitation or vomiting. This is due to the fact that when oxygen is introduced into the pharynx via positive pressure.

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Answer:

The 3p electron in M has jumped down to a lower energy state  

Explanation:

L  - 1s² 2s²2p⁶ 3s²

M - 1s² 2s²2p⁶ 3s3p

L and M have the same number of electrons, so they are atoms of the same element.

Atom M is an excited state of atom L.

Either atom L has been excited to atom M or atom M has dropped to the ground state to form atom L.

A is wrong. Both atoms have two 2p electrons.

B is wrong. Atom L has no 3p electrons.

C is wrong. The 3s electron of atom L is already in its lowest energy state.

Answer:

1. Foods that have changes that are chemically introduced.

2. corn soybeans apples etc

3. sot they last longer or look better

4. new dna is placed in them and their seeds

5. they are not as good for humans

Explanation:

Answer:

i think its A but im not sure. Hope this helps

91 is the proton number and 36 is the neutron. fusion has a nearly limitless source of fuel and produces less radioactive material than fission, it presents an intriguing option.

Thus, The challenges in using fusion offset these advantages. It is expensive to produce the ideal circumstances for a fusion reaction, and these reactions are difficult to regulate.

While scientists continue to work on managing nuclear fusion in an effort to create a fusion reactor that can produce electricity, research into improved ways to harness the power of fusion is still in the experimental stages.

Nuclear reactions that produce energy include both fission and fusion, although the methods are very dissimilar. A heavy, unstable nucleus can fission into two lighter nuclei, while two light nuclei can fuse together.

When two low-mass isotopes, usually hydrogen isotopes, combine at extremely high pressures and temperatures, fusion occurs.

Thus, 91 is the proton number and 36 is the neutron. fusion has a nearly limitless source of fuel and produces less radioactive material than fission, it presents an intriguing option.

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The balanced equation for the beta emission decay of iodine-126 is as follows:

Decay process in nuclear reactions refers to the spontaneous transformation of an unstable nucleus into a more stable one, emitting one or more particles or radiation in the process.

The types of decay include

This process results in a decrease in the total number of protons and neutrons in the nucleus and a decrease in the total atomic number and mass number of the nucleus.

In the equation, the beta particle is an electron emitted from the nucleus during the decay process.

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A compound consists of 81. 71% C and 18. 29% H has empirical formula: C₇H₈

The empirical formula is the ratio of number of atoms (in integers) in a compound.

Suppose the given compound is 100 gram, then:

mass of C =  81. 71% x 100 gram = 81.71 gram

moles of C = mass of C / molar mass of C

molar mass of C = 12.01 g/mol

Hence,

moles of C = 81.71 / 12.01 = 6.8 mol

Similarly for H atoms:

mass of H =  8.29% x 100 gram = 8.29 gram

moles of H = mass of H / molar mass of H

molar mass of H = 1.008 g/mol

Hence,

moles of H = 8.29 / 1.008 = 8.22 mol

The ratio of moles:

mol C : mol H = 6.8 : 8.22

mol C : mol H ≈ 7 : 8

Hence, the empirical formula is C₇H₈

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B. ball rolling down the hill

The type of energy that is NOT chemical energy is:

B. ball rolling down the hill

Chemical energy refers to the energy stored in chemical substances, such as the energy released during a chemical reaction or the energy stored in the bonds of molecules.

Options A, C, D, and E all involve examples of chemical energy:

A. Butane in a lighter:

The combustion of butane releases chemical energy in the form of heat and light.

C. Food:

The energy stored in food molecules, such as carbohydrates, fats, and proteins, is converted into chemical energy during metabolism.

D. Gasoline in a car:

The combustion of gasoline in an engine releases chemical energy, which is converted into mechanical energy to power the car.

E. Battery:

Batteries store chemical energy that can be converted into electrical energy through chemical reactions.

In contrast, option B, a ball rolling down the hill, involves kinetic energy. Kinetic energy refers to the energy of an object due to its motion.

As the ball rolls downhill, its energy is in the form of kinetic energy, not chemical energy.

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Answer: b. carbon dioxide

d. gasoline

h. air( a gaseous solution )

g. mercury

tap water is a solution of small amounts of several substances in water.

Explanation: a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.