Covalent bonds in a molecule absorb radiation in the IR region and vibrate at characteristic frequencies.
(a) The C_O bond absorbs radiation of wavelength 9.6 μm. What frequency (in s⁻¹) corresponds to that wavelength?

Answer:

591.471 MILLIMETERS

Explanation:

Formula  

for an approximate result, multiply the volume value by 29.574

29.574*20=591.471

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The heat released by its complete combustion of 171 ml of acetone is -4304.5 Kcal.

Acetone is an organic compound with the system (CH₃)₂CO. it's miles the best and smallest ketone. it is a drab, particularly unstable and flammable liquid with a function smelly odor. Acetone is miscible with water and serves as a vital natural solvent in its personal proper, in industry, home, and laboratory.

Calculation:-

C3H6O(l)+ 4O2 (g) ---> 3CO2 (g) +3H2O (g), ΔHo of the reaction =-1790 kcal

  Volume acetone contained in the bottle =  177mL

  density = 0.788 g / mL

   ∴  mass of the substance present= 0.788 x 177

                                                        =139.476 g

     number of moles of acetone =mass / molar mass

                                               = 139.476 / 58

                                               =2.404

  One mole of acetone on combustion releases -1790Kcal of heat

   ∴  2.404 moles of  acetone releases  2.404 x ( -1790) = -4304.5 Kcal of heat.

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Mercury, Venus, and Mars are all rocky planets. None are more or less different than Earth. Earth is the largest and the only planet with extensive regions of liquid water.

Explanation:

Answer:

En nuestro sistema solar, hay cuatro planetas terrestres, que también son los cuatro más cercanos al sol: Mercurio, Venus, Tierra y Marte. Durante la formación del sistema solar, probablemente hubo más planetoides terrestres, pero se fusionaron entre sí o fueron destruidos.

A redox reaction is when there is simultaneous oxidation and reduction. CuO+H2→Cu+H2O. Example: In this reaction, hydrogen is oxidised to water while copper oxide is reduced to copper.

By assuming that all bindings to the atoms in molecules are ionic, we can use the oxidation numbers assigned to atoms in molecules to detect redox reactions. In a reaction, oxidation is shown by an increase in the number of oxidations, and reduction is indicated by a copper. Consider the sodium-water reaction. In this reaction, sodium removes hydrogen from water while both becoming oxidised by obtaining oxygen and reducing the water to hydrogen by removing oxygen at the same time.

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1. Gravitational lensing is the phenomenon that we call a massive object that can distort the light of more distant objects behind it.

2. WIMPs (weakly interacting massive particles) are defined as subatomic particles that have more mass than neutrinos but do not interact with normal matter.

3. The rotation curves of spiral galaxies provide strong evidence for the existence of dark matter.

4. Baryonic matter made from atoms with nuclei consisting of protons and neutrons, represents what we call ordinary matter.

5. Models show that the evolution of the universe is better-explained when we include the effects of dark matter along with the effects of luminous matter.

6. Matter consisting of particles that differ from those found in atoms is generally referred to as exotic matter.

What is dark matter? Dark matter is a kind of matter that scientists assume to exist since it does not interact with light and cannot be seen through telescopes. Dark matter is believed to account for approximately 27% of the matter in the universe. Dark matter interacts gravitationally with visible matter and radiation, but it doesn't interact with electromagnetism, making it completely invisible to telescopes that observe electromagnetic radiation, such as radio waves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays.

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Answer:

Mass of water == 1.71 g

Explanation:

Given data:

Initial temperature of water = 10°C

Final temperature of water = 50°C

Energy absorbed = 286 J

Mass of water = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water is 4.18 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT =  50°C -  10°C

ΔT = 40°C

by putting  values,

286 J = m × 4.18 J/g.°C × 40°C

286 J = m × 167.2 J/g

m = 286 J / 167.2 J/g

m = 1.71 g

Answer:

518 mL

Explanation:

We can solve this using Boyle's Law Formula

P1V1 = P2V2

where p1 = initial pressure, p2 = final pressure, v1 = initial volume and v2 = final volume

here , the initial pressure is 1 atm and the initial volume is 725mL

we are given the final pressure 1.4 and we need to find the final volume

so we have p1v1 = p2v2

==> plug in p1 = 1 , v1 = 725 mL and p2 = 1.4

(1)(725) = (1.4)v2

==> multiply 1 and 725

725 = (1.4)(v2)

==> divide both sides by 1.4

v2 = 518

N2 would have a volume of 518mL at 1.4atm

Answer:

517.86 mL

Explanation:

Boyle's Law Formula

Here :

Solving

Magnetic Resonance Spectroscopy (MRS): MRS is a non-invasive imaging technique that allows for the measurement of chemical concentrations in the brain. It uses magnetic fields and radio waves to detect the signals emitted by different chemicals in the brain.

Gamma-Aminobutyric Acid (GABA): GABA is an important neurotransmitter in the brain that helps regulate neuronal activity. It is involved in the inhibition of neuronal signals, which is crucial for maintaining a balance in brain function.
Bipolar Disorder: Bipolar disorder is a mental illness characterized by extreme shifts in mood, energy, and activity levels.

It is believed to be caused by a combination of genetic, environmental, and neurochemical factors.
Measurement of GABA Concentrations: The MRS technique allows researchers and clinicians to measure the concentration of GABA in the brain. By comparing the GABA levels in patients with bipolar disorder to those without the disorder, scientists

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Answer:

chemical bond are bonds that are strong lasing between chemicals and irons and morecles

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 76.6 g

volume = 12 mL

The density of iron (ll) oxide is

\(density = \frac{76.6}{12} \\ = 6.38333333...\)

We have the final answer as

Hope this helps you

Answer:

he answer is

3.83 g/mL

Explanation:

The density of a substance can be found by using the formula

From the question

mass = 76.6 g

volume = 12 mL

The density of iron (ll) oxide is

Explanation:

The three (3) examples from the sword fighting scene that showed Inigo and the masked man's similarities are:

Inigo Montoya was one of the fictional character in the novel titled "The Princess Bride" and written by William Goldman's in 1973. Inigo hails from the village called Arabella and he was raised by his father Domingo Montoya, who was a master craftsman that makes sword.

In The Princess Bride, Inigo had a swordfight with a man in black (masked man) and they have the following things in common:

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In any hydrogen bond interaction, the hydrogen atom is the donor atom, and the electronegative atom is the acceptor atom.

Hydrogen bond is an intermolecular force that involves a hydrogen atom and a strongly electronegative atom such as N, O, and F.

The hydrogen bond is formed between the hydrogen atom and the nonbonding electron pair of the electronegative atom.

This bond is crucial in biological systems and plays an essential role in the structure of water.

The donor atom is the atom that is covalently bonded to the hydrogen atom.

In hydrogen bonds, the donor atom is hydrogen.

The acceptor atom is the atom that interacts with the hydrogen atom through a lone pair of electrons.

In hydrogen bonds, the acceptor atom is usually oxygen or nitrogen.

Therefore, in any hydrogen bond interaction, the hydrogen atom is the donor atom, and the electronegative atom is the acceptor atom.

These atoms play a significant role in the hydrogen bond formation.

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Angiotensin -I (A-I) is a peptide hormone that is produced from the proteolytic action of renin on angiotensinogen. In order for A-I to become its active form, angiotensin -II (A-II), it must be subjected to the action of an enzyme known as angiotensin -converting enzyme (ACE).

Correct option is A.

ACE is a dipeptidyl carboxypeptidase that cleaves the terminal dipeptide from A-I, leaving the active form of A-II. This process is important because A-II is a potent vasoconstrictor that also stimulates aldosterone secretion from the adrenal cortex.

Aldosterone helps to regulate sodium and water balance in the body, and thus A-II plays a key role in maintaining normal blood pressure and fluid balance in the body. Therefore, ACE is necessary for the transformation of A-I into A-II, and without it the body would be unable to produce the active form of the hormone.

Correct option is A.

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Answer:

the answers are given in the photo

Answer:

Explanation:

before the reaction you have K=2 and Cl=4

after the reaction K=2 and Cl=2 so it does not follow the law of conservation

An atom's configuration based on its number of electrons ends at 3p. Another atom has seven more electrons. Starting at 3p, the remaining configuration is O3p445²3d5. Option C is correct answer.

The electron configuration of an element refers to the number of electrons in each of its atoms that are located in the shells around the atomic nucleus. Electrons in the same shell have similar energies; they are arranged in shells according to increasing energy levels.According to the question, the atom's configuration based on its number of electrons ends at 3p, and another atom has seven more electrons. Hence, the electron configuration of that atom should start with 3p since the question states starting at 3p. The remaining seven electrons should go into the 4s and 3d sub-shells. Therefore, the correct answer is:O3p445²3d5

The correct answer is C.

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Answer:

Explanation:

Mass is a measure of the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg), but smaller masses may be measured in grams (g). To measure mass, you would use a balance. ... In that case, the fruit would have a mass of 1 kg, the same as the iron.

Answer:

Similarities: the states of the recants

Explanation:

The ionic compound that would be expected to have the highest lattice energy is c BaO.

Lattice energy is the energy required to separate an ionic compound into its individual ions. The higher the lattice energy, the stronger the ionic bond and the more stable the compound. Lattice energy is affected by the charges of the ions and the distance between them. The higher the charges and the smaller the distance, the higher the lattice energy.

In the given options, BaO has the highest lattice energy because it has the highest charges (+2 for Ba and -2 for O) and the smallest distance between the ions (Ba and O are both relatively small ions). CO2 and CS2O are both covalent compounds, so they do not have lattice energy. Ga2O3 has lower charges (+3 for Ga and -2 for O) and larger distance between the ions (Ga is a larger ion than Ba), so its lattice energy is lower than that of BaO.Therefore, the correct answer is c BaO.

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Answer:

You can only be able to solve two variables, k and x based on what you input as your question

k= -2x+3

x= (3-k)/2

Explanation:

The time required for the same volume of helium to pass through the hole under the same conditions will be 14 seconds.

what is graham's law of diffusion?

Thomas Graham developed Graham's Law, also referred to as the "Graham's Law of Effusion," in 1848. Thomas Graham conducted experiments with the effusion process and identified a crucial characteristic: lighter gas molecules move more quickly than heavy ones.

Graham's Law states that at constant pressure and temperature, molecules or atoms having a lower molecular mass will effuse more quickly than those with a larger molecular mass. Thomas even discovered the speed at which they diffuse away. It means that the square root of a gas's molecular mass is inversely proportional to the rate of effusion of that gas.

How to find the time required for helium from graham's law of diffusion?

Graham's law of diffusion is given by

\(\frac{Rate 1}{Rate 2}\) = \(\sqrt{\frac{M1}{M2} }\), where Rate 1 is rate of diffusion for 1 ( volume per time) and Rate 2 is rate of diffusion for 2 ( volume per time).

M1, M2 are molecular weight of 1 & 2

In our  case 1 → Methane, 2→ Helium

Molecular weight of methane(\(CH_{4}\)) → 16

Molecular weight of Helium ( He) → 4

Substituting in equation 1, \(\frac{Rate of Methane}{Rate of Helium}\) =\(\sqrt{\frac{4}{16} }\) = \(\sqrt{\frac{1}{4} }\)=  \(\frac{1}{2}\)

\(\frac{Rate of Methane}{Rate of Helium}\)  = \(\frac{1}{2}\)

Now, Rate of methane = \(\frac{Volume}{Time}\)=\(V_{methane}\) / 28

It is given that

\(V_{methane}\) = \(V_{Helium}\) = V

Let, time taken by helium  be t

∴Rate of methane  = \(\frac{V}{28}\)

Rate of Helium = \(\frac{V}{t}\)

Substituting above values in equation (2),

\(\frac{\frac{V}{28} }{\frac{V}{t} }\) = \(\frac{1}{2}\)

\(\frac{t}{28}\) = \(\frac{1}{2}\)

t = 14 seconds.

Therefore time required by helium = 14 seconds.

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Answer:

The answer is B

Explanation:

The moon is in-between the sun and the Earth during a new moon.

Answer:

Thus, the element containing the greatest number of atoms is 12 g He. Thus, the correct option is (4) 12 g He. Note: The number of atoms of a compound is Avogadro's number for 1 mole of compound. The number 6.022×1023 is known as Avogadro's number.

Explanation:

(4)✔️ 12 g He

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Answer:

120gram I think so this is the answer if the answer is correct plz mark me as brainliest.

Answer:

standard carbon atom

Explanation:

Answer:

Explanation:

This is an isotope of carbon, more specifically, carbon-14. Carbon 14 has 6 protons, making the element carbon, and eight neutrons since 14-6 = 8.

Answer:

0.985

Explanation:

moles= mass/Mr

Mr is the molecular mass

Cu=63.5

F2=38

Mr=63.5+38=101.5

moles=100/101.5=0.985

round answer if needed

Answer:

These atoms belong to the same element (sulfur, atomic number \(16\).) Hence, the atomic number of each atom would be equal to the atomic number of sulfur: \(16\!\).

Each of these isotopes contains a different number of neutrons. Hence, the mass number (number of neutrons and protons in the atom) differ.

Explanation:

The atomic number of an atom is the number of protons in the atom.

The mass number of an atom is the number of protons in this atom, plus the number of neutrons in this atom.

The exact element (e.g., sulfur) that an atom belongs to depends on the atomic number of that atom. For example, an atom with atomic number \(16\) belongs to sulfur, while an atom with atomic number \(18\) belongs to argon.

All four types of atoms in this sample belongs to the element sulfur. The atomic number of sulfur is \(16\). Hence, the atomic number of all four types of atoms must also be \(16\!\). Otherwise, these atoms would belong to other elements and won't be named after "sulfur".

Hence, all atoms in this sample would have the same atomic number: \(16\). Each of these atoms would contain \(16\!\) protons.

While the number of protons in each of these atoms is fixed, the number of neutrons in each of these atoms could still vary. Because the mass number of an atom accounts for both protons and neutrons, the mass number of these atoms would not be the same.

For example, sulfur-\(32\) (mass number \(32\!\)) contains \(32 - 16 = 16\) neutrons, whereas sulfur-\(33\) (mass number \(33\!\)) contains \(33 - 16 = 17\) neutrons. (The \(16\) in the left-hand side is the number of protons in each of these atoms.) Hence, these types of atoms have different mass numbers even though they share the same proton number.

The following regarding sodium is accurate When an ion is positively charged, it is the most stable.

In case you forgot, ions are the name for atoms that have either positive or negative charges.A negatively charged atom known as an anion is one that has gained one or even more electrons.A positively charged atom is known as a cation when one or more of its electrons have been lost.It turns into sodium quizlet when an atom loses an electron.

Due to the fact that sodium has fewer electrons than protons, when it loses an electron, it changes from a neutral ion to a positively charged cation.

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Answer:

its carbon

Explanation:

iron oxide + carbon = iron + carbon dioxide

as coke(mainly carbon) is a raw material gone into a blast furnace displaces iron.

The mass of ammonium nitrate (in g) that has the same number of nitrogen atoms as 2.5 liters of liquid nitrogen (n2) is 72.10g.

Given the volume of liquid nitrogen (V) = 2.5L = 2500ml

The liquefied form of the element nitrogen, known as liquid nitrogen, is created commercially through fractional distillation of liquid air.

The density of liquid nitrogen is (d) = 0.808 g/ml.

Let the mass of ammonium nitrate = m

We know that density = mass/volume

mass = density x volume

The molecular weight of liquid nitrogen = 28.0134g

m = (0.808 x 2500) x 1 mole N2/28.0134 = 72.10g

Hence the required mass of ammonium nitrate is 72.10g

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