If n moles of a salt MX2 dissociate in one liter of water, the Ksp can be expressed:
A. n3
B. 2 n2
C. 3 n2
D. 2 n3
E. 4 n3

There are 8 photons will be involved in the transfer of 4 electrons from psii to 2 nadp.

The photon of light energy moves till it encounters a chlorophyll molecule. An electron inside the chlorophyll is "activated" by the photon. The electron is provided energy, which enables it to separate from a chlorophyll molecule atom. Therefore, it must be claimed that chlorophyll "donates" an electron.

NADP+, the last electron receiver for linear photosynthesis, needs two electrons to become NADPH. There are 2 NADPH created for every 8 photons (4 to PS-I & PS-II each).

Therefore, there are 8 photons will be involved in the transfer of 4 electrons from psii to 2 nadp.

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Answer:

velocity

Explanation:

Answer:a mouse

Explanation:

Answer: a mouse

Explanation:

Mass of \( \bf H_2SO_4\) is 25 g and we are asked to find number of molecules present in 25 g of \( \bf H_2SO_4\)

\(\qquad\)\( \pink{\bf\longrightarrow { Molar \:mass \:of \:H_2SO_4:-} }\)

\(\qquad\)\( \bf \longrightarrow 1\times2 +32 +16\times 4 \)

\(\qquad\)\( \bf \longrightarrow 98\)

\(\qquad\)____________________

Let's calculate the number of moles present in 25 g of \( \bf H_2SO_4\)

\(\qquad\)\( \purple{\bf\longrightarrow { No \:of \:moles = \dfrac{Given \:mass}{Molar\: mass}}}\)

\(\qquad\)\( \bf \longrightarrow \dfrac{25}{98}\)

\(\qquad\)\( \bf\longrightarrow 0.2551\: moles\)

We know –

Number of molecules:-

\(\qquad\)\( \purple{\bf \longrightarrow No \: of \: moles \times Avogadro \: number}\)

\(\qquad\)\( \bf \longrightarrow 0.2551×6.022×10²³\)

\(\qquad\)\( \bf \longrightarrow 1.54 \times 10^{23}\)

.

\(\qquad\)____________________

Taking into account the definition of Avogadro's number and molar mass, 1.5359×10²³ molecules are in 25 g of H₂SO₄.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

In this case, you know the molar mass of the elements is:

So, the molar mass of the compound H₂SO₄ is calculated as:

H₂SO₄= 2× 1 g/mole + 32 g/mole + 4× 16 g/mole=

Solving:

H₂SO₄= 98 g/mole

You can apply the following rule of three: if 98 grams of the compound are contained in 1 mole, 25 grams are contained in how many moles?

\(amount of moles= \frac{25 gramsx1 mole}{98 grams}\)

amount of moles= 0.255 moles

25 grams are contained in 0.255 moles of H₂SO₄.

Finally you can apply the following rule of three, taking into account the Avogadro's Number: If 1 mole of the compound contains 6.023×10²³ molecules, 0.255 mole of the compound contains how many molecules?

amount of molecules= (6.023×10²³ molecules × 0.255 mole)÷ 1 mole

amount of molecules= 1.5359×10²³

Finally, 1.5359×10²³ molecules are in 25 g of H₂SO₄.

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Avogadro's Number:

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Molar mass:

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Answer:

3846g of Carbon tetrachloride is in the chemical equation.

Explanation:

The Balanced equation is :

   CH4 + 4CL2 -> CCL4 + 4HCL

Converting grams to moles ;

  Moles of CL2 = Mass / Molar mass

  Molles of CL2 = 709.0g/70.906g/mol => 10 moles

  Moles  of CCL4 = Moles of CL2 / 4

  Moles of CCL4 = 10 moles/ 4 => 2.5 moles

Converting moles of CCL4 to grams:

 Mass of CCL4 = Moles of CCL4 x Molar mass of CCL4

 Mass of CCL4 = 2.5 moles x 153.823 g/mol => 384.5575 grams

Therefore 384.6 grams of carbon tetrachloride can be produced from reacting 709.0 grams of chlorine.

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The additional substance necessary for reaction 2 to take place is B. NADH.

Reaction 2 refers to the second step of cellular respiration, which is the Krebs cycle (also known as the citric acid cycle or the TCA cycle). This cycle is a crucial part of the process that generates energy in the form of ATP (adenosine triphosphate) within the cell.

During the Krebs cycle, Acetyl-CoA, a product of the previous stage (glycolysis), is further broken down to produce \(CO_{2}\), NADH, FAD\(H_{2}\), and ATP. NADH is essential for reaction 2 because it serves as an electron carrier, transferring electrons from the Krebs cycle to the electron transport chain in the next stage (oxidative phosphorylation).

This transfer of electrons allows for the production of ATP, which is the main energy source for the cell. In summary, NADH is the additional substance necessary for reaction 2 (Krebs cycle) to take place, as it plays a vital role in transferring electrons and ultimately generating ATP to fuel the cell's activities. The correct answer is b.

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Answer:

The alcohol cleans the penny due to the acid in the vinegar. A chemical reaction between the alcohol removes copper oxide. Copper oxide is what causes pennies to become dull. Salt is also a key ingredient in the other cleaning agents, thus making them effective in cleaning the pennies.

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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When an aldehyde is treated with a strong base, a carbanion is formed.

A carbanion is a negatively charged ion in which a carbon atom has valency equals to 3 and holds a formal negative charge whose magnitude is at least -1. An aldehyde is a class of organic compounds in chemistry which is characterised by presence of -CHO group. When an aldehyde is treated with a strong base like NaOH,KOH, etc., as a resultant or product we get a carbanion.

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The solubility of sodium carbonate is 21.5g per 100ml of water at 20°C

Solubility: The maximum amount of solute that can be dissolved in a given quantity of solvent at a specified temperature and pressure is referred to as solubility. A solution in which the maximum amount of solute has been dissolved at a specific temperature and pressure is known as a saturated solution.

.Now, we need to calculate how much sodium carbonate can be dissolved in 500 mL of water at 20°C. Using the unitary method:100 mL of water can dissolve 21.5 g of sodium carbonate. Therefore, 1 mL of water can dissolve `(21.5)/(100)` g of sodium carbonate.1 mL of water can dissolve 0.215 g of sodium carbonate.500 mL of water can dissolve `(0.215  500)` g of sodium carbonate.500 mL of water can dissolve 107.5 g of sodium carbonate. Therefore, 107.5 g of sodium carbonate can dissolve in 500 mL of water at 20°C.

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Transverse.

Longitudinal travels in the same direction as medium.

Answer:

why

xy=gh

Explanation:

common science

Answer:

yes

Explanation:

Answer:

i say yes, because the salt helps to melt the road a little, and my brain says that is a chemical reaction

Explanation:

Answer:the first answer is correct and 8 is O, Ge, Mn

Explanation:

2.04 x 1\(0^{22}\) atoms of copper are in an old penny made of pure copper and weighing 2.1

To find out how many atoms of copper are in an old penny made of pure copper and weighing 2.15 grams, follow these steps:

1. Determine the molar mass of copper (Cu): Copper has a molar mass of 63.55 grams/mole.
2. Convert the weight of the penny (2.15 grams) to moles: (2.15 grams) / (63.55 grams/mole) = 0.0338 moles of copper.
3. Use Avogadro's number (6.022 x  1\(0^{23}\)  atoms/mole) to find the number of copper atoms: (0.0338 moles) * (6.022 x 1\(0^{23}\) atoms/mole) = 2.04 x 1\(0^{22}\) atoms.

There are approximately 2.04 x 1\(0^{22}\) atoms of copper in an old penny made of pure copper and weighing 2.15 grams.

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The temperature of water vapour rises as a result of the water molecules' increased kinetic energy, which makes them travel more quickly and collide more frequently, raising the temperature.

When the heat is raised (as occurs when water boils, for example), the hydrogen bonds between the water molecules completely disintegrate, allowing the water molecules to escape as gas into the air.

Moreover, as gas molecules exit the liquid, the liquid loses thermal energy. As a result, the liquid's temperature doesn't change when it boils. For instance, water will continue to boil at 100°C (at a pressure of 1 atm or 101.3 kPa).

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In a common laboratory experiment in general chemistry, students are asked to determine the relative amounts of benzoic acid and charcoal in a solid mixture. Benzoic acid is relatively soluble in hot water, but charcoal is not. Devise a method for separating the two components in the mixture.

First you put the mixture in hot water and allow the benzoic acid to separate. Next funnel it and then see what's on the funnel paper. Lastly, heat the leftover water and see what's left after it evaporates.

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The energy required to increase the temperature of one gram of a substance by one kelvin is called specific heat. Specific heat is defined as the amount of heat energy required to raise the temperature of one unit mass (usually one gram) of a substance by one degree Celsius or one kelvin. It is expressed in units of joules per gram per Kelvin (J/g*K).

Different substances have different specific heat values, which means they require different amounts of energy to be heated up or cooled down. For example, water has a high specific heat value of 4.184 J/g*K, which means it takes a lot of energy to raise its temperature. On the other hand, metals have lower specific heat values, which means they heat up and cool down quickly.
The concept of specific heat is important in various fields of science and engineering, including thermodynamics, materials science, and chemical engineering. It is used to calculate the amount of energy needed to heat or cool substances, design heating and cooling systems, and understand the behavior of materials under different temperature conditions.

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Explanation:

when some sunlight reaches the moon, the sunlight passes through earth's atmosphere, which causes earth's atmosphere to filter out most of the blue light, so it'll be "The sun blocks the moons light" it seems reasonable to the Explanation above, as the sunlight surpasses the moon leading to a lunar eclipse. This is what I personally think.

A)The temperature of the water drops when ice is added to it. This happens as a result of a heat transfer that is brought on by the ice absorbing thermal energy from the water.

B) The temperature drop that was noticed is how we know that thermal energy was transferred from the water to the ice.

C)Heat is transferred when the more energetic water molecules collide with the colder ice molecules in a process known as heat conduction.

D)The ice melts and the water temperature drops as a result of the energy transfer, which causes the ice molecules to gain energy and the water molecules to lose energy.

The temperature of the water dropped when you added ice to it. The reason for this temperature change is that the ice absorbs thermal energy from the water, causing the water's temperature to drop.

Based on the laws of heat transfer and the observation of temperature change, we can deduce that thermal energy was exchanged between the water and the ice. Until equilibrium is attained, thermal energy constantly transfers from an object with a higher temperature to one with a lower temperature.

In this instance, the water is initially warmer than the ice. Heat is transferred from the water to the ice when the ice is introduced, and this continues until both have reached the same temperature. As a result, the temperature of the water drops, signaling a thermal energy transfer from the water to the ice.

Heat conduction is the term for the molecular process behind this thermal energy transfer. Water molecules' kinetic energy causes them to move constantly at the molecular level. The water molecules close to the ice come into contact with the cooler ice molecules when the ice is introduced.

The ice molecules, which have lower kinetic energy, get thermal energy from the more energetic water molecules through molecular collisions. The average kinetic energy (temperature) of the water molecules decreases as a result of this energy transfer.

The ice molecules gain thermal energy and start to melt as a result of these collisions and energy transfers, whilst the water molecules lose thermal energy and the temperature drops.

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Nitrogen dioxide (NO2) reacts with water (H2O) to form nitric acid (HNO3). The reaction occurs through a series of steps involving the dissolution of NO2 in water and subsequent chemical reactions.

Initially, when nitrogen dioxide is dissolved in water, it forms nitric acid by undergoing the following reaction:

NO2 + H2O → HNO3

The nitrogen dioxide molecule reacts with a water molecule to produce a molecule of nitric acid. In this reaction, the oxygen atom from the water molecule combines with the nitrogen atom from the nitrogen dioxide molecule to form the nitric acid molecule.

The reaction is facilitated by the presence of water, which acts as a solvent and allows the dissolution and subsequent chemical transformation of nitrogen dioxide into nitric acid.

This reaction is an important step in the formation of nitric acid, which has various industrial applications, including the production of fertilizers, explosives, and certain chemicals.

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Answer:

Liquid isopropanol.

Explanation:

Liquid isopropanol will evaporate earlier than water because the boiling point of isopropanol is less than water. That liquid which have high boiling point require more heat energy for change into vapor state as compared to those liquids that has low boiling point. The isopropanol has boiling point i.e. 82.5 °C while on the other hand, water has boiling point i.e. 100 °C so we can say that isopropanol will evaporate first.

The liquid that will be the first to evaporate within 5 minutes is; Liquid Isopropanol

We have the 2 liquids as;

Liquid Isopropanol

Liquid water

Now, since we are dealing with the one that will evaporate within five minutes, we need to know their boiling points.

From online research;

Boiling point of liquid isopropanol is 82.5°C

Boiling point of liquid water is 100°C

Now, we are told that the same energy is transferred for both liquids. However, boiling point of the liquid with the lower boiling point will be achieved first and as a result will evaporate first since the next stage after boiling point is evaporation of steam.

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Answer:

D.  Newton's second law

Explanation:

Two alcohols are produced when 4-methylcyclohexanone reacts with CH3MgBr and is then neutralised. They are diastereomers, these two alcohols.

These two substances combine to form 1,4-dimethyl-1-cyclohexanol. Grignard's reagent reacts with aldehydes other than formaldehyde to produce secondary alcohol as a byproduct. Tertiary alcohol is produced when a ketone reacts with Grignard's reagent. Only two aldehydes with the formula C4H8O are thus capable of producing secondary alcohol when they react with Grignard's reagent. Two or three electron pairs are shared between the atoms in multiple bonds. Constituent isomers have the same structure as structural isomers. Stereoisomers that are not identical mirror images are known as diastereomers. Therefore, they occur when some of the equivalent (related) stereocenters of two or more stereoisomers of a molecule do not have the same configuration at all of them but rather have different configurations.

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Answer:

Explanation:

The original volume can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we are finding the original volume

\(V_1 = \frac{P_2V_2}{P_1} \\\)

From the question we have

\(V_1 = \frac{3700 \times 0.96}{710} = \frac{3552}{710} \\ = 5.002816...\)

We have the final answer as

Hope this helps you

Answer:

Explanation:

En este caso para formular los compuestos, debes identificar el grupo funcional principal de la molecula. Una vez que eso está hecho, puedes intentar formularlo.

Empezaremos primero identificando el grupo funcional principal de la molécula, para luego formularlo correctamente.

Dietil eter: la terminación eter al final significa que pertenece al grupo de los éteres, el cual tiene como formula general R - O - R.

Etanol: debido a que termina en ol, este grupo pertenece a los alcoholes. Para formularlo solo se dibuja la molecula del etano, junto a un enlace con el grupo OH, como su formula general R - OH.

Propanotriol: igualmente termina en ol, por lo tanto es un alcohol, sin embargo, en este caso, tambien tiene la terminación prefija tri, asi que significa que hay 3 grupos OH en la molecula.

Acido propanodioico: esta es sencilla, porque empieza como acido, y solo hay un grupo funcional que empieza así y son los acidos carboxilicos, es decir, el grupo COOH (R - COOH) que es el carboxilo. Tiene el prefijo di, antes del oico, por lo que son dos carboxilos presentes en la molecula.

Pentanal: el sufijo al, significa que pertenece al grupo de los aldehidos, en este caso, posee el grupo carbonilo H - C = O.

Pentano - 2,4 - diona: la terminación ona significa que pertenece al grupo de las cetonas, (R - CO - R), parecido a los aldehidos, con la diferencia de que tiene grupos alquilos en lugar de un hidrogeno.

Metanoato de metilo: la terminación ato de ilo, pertenece a los esteres, (R - COOR) derivado de los acidos carboxilicos.

De aqui en adelante solo mencionaré los grupos funcionales pues ya se explicó el por que, por sus terminaciones:

Ciclohexano - 1.3 - diol: este pertenece a los alcoholes.

Acido heptanoico: acido carboxilico

Ciclobutil metil eter: eteres

Acetato de etilo: ester

2-metilbenzaldehído: aldehído unido a un grupo aromatico como el benceno.

Ciclohexanona: un ciclo (cadena cerrada) unido a un grupo carbonilo.

Butanona: cetona.

Observa la foto adjunta para que veas la formulación de cada una:

Answer:

The Sun radiates huge amounts of energy. Only a small portion of that energy hits the Earth, but it is enough to light our days, heat our air and land, and create weather systems over the oceans. Most of the energy you will learn about comes from the Sun. The Earth also gives off energy.

Explanation:

Answer:

"The Sun radiates huge amounts of energy. Only a small portion of that energy hits the Earth, but it is enough to light our days, heat our air and land, and create weather systems over the oceans. Most of the energy you will learn about comes from the Sun. The Earth also gives off energy."

By the way I got this off thee internet and copy  and pasted it so don't write it just look and write in your own words please. Please do not copy and paste or write what i wrote because this is someone else's explanation or answer

Hope this helps!! Also please rank thank you.

Explanation:

Explanation:

The relative formula mass of a substance, shown in grams, is called one mole of that substance. So one mole of carbon monoxide has a mass of 28 g, and one mole of sodium oxide has a mass of 62 g

Answer:

M(CO)=28 (g/mol)

Explanation:

M= 12+16=28 (g/mol)