Peroxyacylnitrate (PAN) is one of the components
of smog. It is a compound of C, H, N, and O.
Determine the percent composition of oxygen and
the empirical formula from the following percent
composition by mass: 19.8 percent C,
2.50 percent
H, 11.6 percent N. What is its molecular formula
given that its molar mass is about 120 g?

Answer:

Sedimentary

Explanation:

ATP hydrolysis releases energy in the form of a high-energy phosphate bond.

This energy can be harnessed to drive energetically unfavorable condensation reactions, such as the reaction A-H + B-OH → A-B + H2O. In this reaction, a covalent bond is formed between A and B, while a water molecule is released.

The overall reaction can be written as:

B-OH + ATP → B-PO4 + ADP (phosphorylation of B)

B-PO4 + A-H → A-B + H2O + Pi (condensation reaction)

The overall reaction is exergonic, as it involves the release of energy from the hydrolysis of ATP, which is coupled to the energetically unfavorable condensation reaction.

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Answer: The degree of ionization of a weak acid is greater than 50% but less than 100%.

Explanation:

An acid which dissociates partially or weakly when dissolved in water is called a weak acid.

For example, acetic acid \((CH_{3}COOH)\) is a weak acid.

Hence, the degree of ionization of a weak acid is greater than 50% but less than 100%.

Thus, we can conclude that the degree of ionization of a weak acid is greater than 50% but less than 100%.

D. 62.8 J

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Thermodynamics

Specific Heat Formula: q = mcΔT

Step 1: Define

[Given] m = 0.750 g

[Given] c = 4.186 J/g °C

[Given] ΔT = 40.0 °C - 20.0 °C = 20.0 °C

[Solve] q

Step 2: Solve

Step 3: Check

Follow sig fig rules and round. We are given 3 sig figs.

62.79 J ≈ 62.8 J

It occurs in oxygen I think

Answer:

C

Explanation:

Heat is added to a substance, but its temperature does not rise

because

(c) the substance undergoes a change of phase.

Heat, which is energy, either comes into the material during a change of phase or heat comes out of the material during this change.

Melting, Condensation, Vaporization & Sublimation

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Answer:

the answer is D . our galaxy

Answer:

our galaxy of course

Answer:

HCl(aq) + NaOH(aq) ⇒ NaCl(aq) + H₂O(l)

H⁺(aq) + OH⁻ ⇒ H₂O(l)

Explanation:

Let's consider the balanced chemical equation (molecular equation) for the reaction between hydrochloric acid and sodium hydroxide. This is a neutralization reaction.

HCl(aq) + NaOH(aq) ⇒ NaCl(aq) + H₂O(l)

The complete ionic equation includes all the ions and the molecular species.

H⁺(aq) + Cl⁻(aq) + Na⁺(aq) + OH⁻ ⇒ Na⁺(aq) + Cl⁻(aq) + H₂O(l)

The net ionic equation includes only the ions that participate in the reaction (not spectator ions) and the molecular species.

H⁺(aq) + OH⁻ ⇒ H₂O(l)

Answer:

I don't know what the hell is going on with the this.

The hybridisation of EC =LP +BP = 3+2 = 5

Answer:

A Intrusive

Explanation:

I go to K12 and they say that's the answer

Note that convection currents in the mantle drive plate tectonics, causing the event. These currents push and pull on plates, creating divergent, convergent, and transform boundaries. This event is caused by plate interaction at divergent or convergent boundaries.

Divergent and convergent boundaries can be found along plate tectonic boundaries such as mid-oceanic ridges and subduction zones.

Convection currents are the movement of material in a fluid or solid due to differences in temperature and density. In the context of plate tectonics, convection currents in the Earth's mantle drive the movement of the tectonic plates. These currents are thought to be driven by heat from the Earth's interior and the cooling and sinking of dense materials at the surface.

Note that in the attached image, the lines in red mark the divergent and convergent boundaries and where they can be found.

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Answer:

0.75 mol

Explanation:

Given data:

Number of moles of Na = 0.75 mol

Mass of water = 500 g

Moles of hydrogen gas produced = ?

Solution:

Chemical equation:

Na + H₂O   →      NaO + H₂

Number of moles of water:

Number of moles = mass/molar mass

Number of moles = 500 g/ 18 g/mol

Number of moles = 27.8 mol

now we will compare the moles of hydrogen gas with both reactant.

                   Na         :          H₂

                    1            :          1

                  0.75       :         0.75

                 H₂O        :          H₂

                   1            :           1

               27.8          :         27.8

sodium will act as limiting reactant it produced small number of moles of hydrogen gas as compared to water.

Thus, number of moles of hydrogen gas are 0.75 mol.

His hypothesis was that b) maggots come from eggs laid by flies.

Redii demonstrated that maggots do not spontaneously generate from rotting meat. He placed three jars containing rotting meat, each covered with different kinds of material. One jar was covered with a fine cloth, one with gauze, and one with cork.

Flies were observed landing on all three jars of meat, but after eight days, only the jar covered with the gauze had maggots on the meat. Redii observed the maggots on the meat and concluded that they had not spontaneously generated, but had come from the eggs of the flies that had landed on the meat.

From this, he concluded that maggots only form on meat that is exposed to the air, and not on meat that is sealed in a jar. This showed that it was not "spontaneous generation" that was creating the maggots, but rather that they were being laid by flies.

This is because he put meat in different locations and found that maggots only appeared where there were flies.

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Answer:

No comparison => John Dalton did NOT postulate an atomic structure.

Explanation:

Dalton's postulates are based upon generalizations of observable phenomena. Micro structure was not proposed.  The atomic structure that's accepted in the scientific community evolved from conclusions of ...

Thompson's raisen pudding model => electrons suspended in a positive matrix

Rutherford's shell model => dense positive nucleus surrounded by an electron cloud. (No fine structure postulated)

Bohr Concentric Ring Model => electrons orbiting a positive nucleus in discrete  energy levels much like planets orbiting the sun.

Schrodinger - Dirac Quantum Models => electrons occupying specific orbital energy levels as based upon statistical wave mechanics.

Answer:

6.3

Explanation:

multiply the length value by 100

The most prevalent galaxy type is spiral. The spiral galaxies resemble enormous pinwheels. Stars, as well as a great deal of gas and dust, make up the pinwheel's arms.

The centers of galaxy clusters hardly ever contain spiral galaxies; instead, they are typically located in low-density areas. A supermassive black monster is found in the central bulge of the majority of spiral galaxies. The brightest galaxy in the cosmos are often spiral galaxies.

The Milky Way is filled with numerous stars, dust particles, and gas. Since it appears to be spinning like a pinwheel when viewed from the top the bottom, this galaxy is called as a spiral galaxy. The Sun is on one of the spiral arms of the galaxy, around 25,000 light-years away.

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Answer:

b its radiant energy that heats up the earth.

Explanation:

Answer:

The answer is D

Explanation:

Heat from the Earth's core and radiation from the Sun is transferred to the surface of the Earth by conduction. The warm land and water radiates infrared, some of which is absorbed by the atmosphere, adding to its thermal energy.

\(pH = - \log[\text{H}^{+}] = -\log \left(1.75 \times 10^{-11} \right) = 10.757\)

Answer:

Ca2+ is an ion with a correct charge.

The wavelength  you get for an angle of incidence of 30 degrees and reflection angle of 7 degrees is

2.3633166* 10^{-4}mm

Generally, To calculate the wavelength, you would need to use the equation for diffraction grating:

mλ = d(sin θi - sin θr)

Where

Plugging in the given values:

1λ = (1/1600 mm)(sin 30° - sin 7°)

Solving for λ:

λ = (1/1600 mm)(sin 30° - sin 7°)

λ = 2.3633166* 10^{-4}mm

This equation gives you the wavelength in the first-order diffraction

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Answer: Ca, O2

Explanation:

Ca + O2 -> CaO

The reactants are the things used in a chemical equation to create a resulting product. As we can see, Ca and O2 are used in the reaction to create the product CaO.

Answer:

The answer is below

Explanation:

A normal model is represented as (μ, σ). Therefore for (1.5, 0.18), the mean (μ) = 1.5 and the standard deviation (σ) = 0.18

The z score shows by how many standard deviations the raw score is above or below the mean. It is given as:

\(z=\frac{x-\mu}{\sigma}\)

a) For x < 1.35 s

\(z=\frac{x-\mu}{\sigma}\\\\z=\frac{1.35-1.5}{0.18}=-0.83\)

From the normal distribution table, the percent of drivers have a reaction time less than 1.35 seconds = P(x < 1.35) = P(z < -0.83) = 0.2033 = 20.33%

b) For x > 1.9 s

\(z=\frac{x-\mu}{\sigma}\\\\z=\frac{1.9-1.5}{0.18}=2.22\)

From the normal distribution table, the percent of drivers have a reaction time greater than 1.9 seconds = P(x > 1.9) = P(z > 2.22) = 1 - P(z<2.22) = 1 - 0.9868 = 0.0132 = 1.32%

c) For x = 1.45

\(z=\frac{x-\mu}{\sigma}\\\\z=\frac{1.45-1.5}{0.18}=-0.28\)

For x = 1.75

\(z=\frac{x-\mu}{\sigma}\\\\z=\frac{1.75-1.5}{0.18}=1.39\)

From the normal distribution table, P(1.45 < x < 1.75) = P(-0.28 < z < 1.39) = P(z < 1.39) - P(z< - 0.28) = 0.9177 - 0.3897 = 0.528 = 52.8%

d) A percentage of 10% corresponds to a z score of -1.28

\(z=\frac{x-\mu}{\sigma}\\\\-1.28=\frac{x-1.5}{0.18}\\\\x-1.5=-0.2034\\\\x=1.27\)

e) P(z < z1) - P(z< -z1) = 60%

P(z < z1) - P(z< -z1) = 0.6

P(z < -z1) = 1 - P(z < z1)

P(z<z1) - (1 - P(z < z1)) = 0.6

2P(z<z1) - 1= 0.6

2P(z<z1) = 1.6

P(z<z1) = 0.8

From the z table, z1 = 0.85

\(0.85=\frac{x-1.5}{0.18}and-0.85=\frac{x -1.5}{0.18} \\\\x=1.65 \ and\ x=1.35\)

The reaction time between 1.35 and 1.65 seconds

The statement "All organic compounds contain the element carbon, but not all compounds containing the element 'carbon' are organic" can be justified based on the definition and characteristics of organic compounds.

Organic compounds are compounds primarily composed of carbon and hydrogen atoms, often with other elements like oxygen, nitrogen, sulfur, and phosphorus. These compounds are typically associated with living organisms and are known for their unique properties and behavior, including the ability to form complex structures, exhibit covalent bonding, and undergo organic reactions.

On the other hand, there are compounds that contain carbon but are not classified as organic. One notable example is carbon dioxide (\(CO_{2}\)), which is a simple inorganic compound composed of carbon and oxygen. Carbon dioxide does not possess the characteristic properties of organic compounds, such as the ability to form long chains or undergo organic reactions.

Additionally, there are inorganic compounds like carbonates (such as calcium carbonate) and carbides (such as calcium carbide) that contain carbon but are not considered organic. These compounds have distinct chemical and physical properties different from those of organic compounds.

In summary, while all organic compounds contain carbon, not all compounds containing carbon are organic. The classification of a compound as organic or inorganic depends on its overall molecular structure, bonding, and characteristic properties.

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