what is the difference between ""drying the organic layer with sodium sulfate"" and ""evaporating the organic solvent?"" (hint: do these imply the same physical/chemical process? how are they the same or different?)

The mass of potassium hydroxide required to neutralize 0.955 moles of sulfuric acid is 107.08 grams.

The balanced equation you provided is for the reaction of potassium hydroxide with sulfur dioxide, not sulfuric acid. The correct equation is:

2KOH(aq) + H2SO4(aq) → K2SO4(aq) + 2H2O(l)

To find the mass of potassium hydroxide required to neutralize 0.955 moles of sulfuric acid, you can use the mole ratio between potassium hydroxide and sulfuric acid in the balanced equation, which is 2:1. That means you need twice as many moles of potassium hydroxide as sulfuric acid to completely neutralize it.

So, the number of moles of potassium hydroxide required is 2 x 0.955 = 1.91 moles.

To calculate the mass of potassium hydroxide required, you can use its molar mass, which is 56.11 g/mol:

mass = number of moles x molar mass

mass = 1.91 moles x 56.11 g/mol

mass = 107.08 g

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180 mL of hydrochloric acid needs to be mixed with 1500 milliliters of water to make a solution that is 12% acid.

What is a mixture?
A mixture is a substance made up of two or more chemical compounds with different properties that are not chemically connected. The physical combination of two or more substances results in solutions, suspensions, or colloids, which retain the separate identity of the individual constituents.

The amount of hydro chlorocalcite will be calculated as below:- 1500x12

Hence, 180 mL of hydrochloric acid needs to be mixed with 1500 milliliters of water to make a solution that is 12% acid.

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Explanation:

CnH2n−2

is the formula for ____________.

Plants are sprayed with water at night to absorb  the heat of freezing thereby keeping the plant warm and avoiding the overnight freeze.

One of the concerns that farmers have during winter is hot to keep their crops from freezing. When the crop freezes, yield of the crop could be affected in the long run.

It is common to spray the plant with water before night so that it can take away the heat of freezing thereby keeping the plant warm and avoiding the overnight freeze.

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Answer:

22.4/3.8=5.89

Explanation:

Answer:

B. Knowing the color and brightness of a star

Explanation:

Answer:

i think ur right

Explanation:

Answer:

they were facing the oppisite ways

Explanation:

The ions that will combine to form a salt in the neutralization reaction are Cl- and Cs+.

In a neutralization reaction between hydrochloric acid (HCl) and cesium hydroxide (CsOH), the hydrogen ion (H+) from HCl combines with the hydroxide ion (OH-) from CsOH to form water (H2O).

This is the neutralization step where the acid and base react to produce a salt and water.

The remaining ions, chloride ion (Cl-) from HCl and cesium ion (Cs+) from CsOH, combine to form the salt cesium chloride (CsCl).

Therefore, the ions Cl- and Cs+ are the ones that combine to form the salt in this reaction.

Neutralization reactions occur when an acid and a base react to form a salt and water. The hydrogen ion (H+) from the acid combines with the hydroxide ion (OH-) from the base to form water (H2O).

The remaining ions from the acid and base combine to form the salt. In this case, hydrochloric acid (HCl) donates its hydrogen ion (H+) to combine with the hydroxide ion (OH-) from cesium hydroxide (CsOH) to form water.

The chloride ion (Cl-) from HCl and the cesium ion (Cs+) from CsOH combine to form the salt cesium chloride (CsCl). The salt is an ionic compound composed of Cs+ cations and Cl- anions.

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Answer: Your answer is carbon dioxide in the air

Hope this helps!

Answer:

Speed = frequency x wavelength 50 cm/s = Freq x 10cm

Explanation:

Answer:

The balanced chemical equation is :

FeCl3 + 3KOH → Fe(OH)3 + 3KCl

Planck period, GUT era, electroweak era, particle era, nucleosynthesis era, era of nuclei, age of atoms, era of galaxies, from first to last.

What is atom ?

Atoms, which are minuscule bits of matter, are what distinguish each chemical element from the others. A negatively charged core nucleus and one or more orbiting electrons make up an atom. It's possible to see the positively charged, relatively large neutrons and protons that make up the nucleus.

Atoms are the basic building blocks of stuff. Anything that has mass and takes up space is made up of atoms.

The combined masses of the protons, neutrons, and electrons in an atom are known as the atomic mass, commonly referred to as the atomic weight. The weight or mass of an atom is given in atomic mass units.

Although electrons make up a very small portion of the mass of the atomic structure, they are crucial to the chemical events that give rise to molecules. The number of protons plus the number of neutrons can be considered the atomic weight for the majority of uses. Since the amount of neutrons in an atom can change, most elements can have a variety of atomic weights.

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Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

The theoretical yield in this instance is 280 kg, however the actual yield is only 70 kg. Consequently, the percent yield is calculated as follows: 25% = 70/280 x 100.

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The molecule which would have the highest boiling point is 2-methylhexane. Thus, the correct option will be D.

The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure. The boiling point of a liquid is a measure of its vapor pressure. The higher the boiling point, the higher the vapor pressure of the liquid, and the more heat is required to vaporize it.

The boiling point of a substance is affected by the strength and types of intermolecular forces. The stronger the intermolecular forces, the higher the boiling point. 2-methylhexane has highest boiling point because it has the highest number of carbons and branches, which contribute to its strong intermolecular forces that lead to a higher boiling point.

Therefore, the correct option is D.

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Answer:

Explanation:

Transparent and translucent materials transmit most of the light that strikes them, but not all of it. Light can also

reflect off these materials. When light reflects, it is bouncing off something. Windows transmit most of the light that strikes them, but they also reflect light. If you have a lamp turned on near a window at night, you can see the reflection of the lamp in the window.

Transparent and translucent materials also absorb some of the light that strikes them. When something absorbs light, it is soaking up the light. When light is absorbed by an object, the light energy changes to heat energy and the object heats up. If you touch a window that has been in the sunlight, you will notice that it is warm.

Opaque materials do not transmit any light. All of the light that strikes an opaque material is reflected or absorbe

Answer:

The disc is made of silver.

Explanation:

To solve this question we need to calculate the metal's density. To do so we need its mass (already given by the problem, 1.31 kg) and its volume.

Following Archimedes' principle, the volume of water displaced by the disk is equal to the disk's volume. This means the metal's volume is 125 mL.

Now we convert 1.31 kg into g, to better compare with the given options:

Finally we calculate the metal's density:

Looking at the densities given by the problem, the closest one is silver.

The answer would be the round- bottom flask. When setting up the distillation setup and the round-bottom flask port serves as the water inlet.

As the round-bottom flasks is used for the boiling and also known as boiling flask.

Hence it permit the flask to have a uniform heating all over the process. The heat dispense equally in the entire process.

It is also called as RB flask.

Discovered by Emil Erlenmeyer and this equipment made from Pyrex glass.

Round-bottom flasks are the kind of flasks having spherical bottoms used as experimental glassware, generally used for chemical or biochemical work.

Hence, The port farthest from the RB flask.

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We must take into account the suggested mechanism mentioned in your previous mail in order to anticipate the rate equation for the reaction between chlorine atoms (Cl) and ozone (O3):

ClO + O3 Cl + 2O2 (rapid step), step 1.

Step 2 (slow step): ClO + Cl Cl2 + O2.

The whole response can be expressed as follows:

2O3 → 3O2

By taking into account the rate-determining step, which is the slowest step in the suggested mechanism, we may formulate the rate equation for the total reaction. It is Step 2 in this instance:

Rate = k[ClO][Cl]

Where:

k is the rate constant for the reaction

[ClO] is the concentration of ClO

[Cl] is the concentration of Cl

Rate = k[ClO][Cl]

Where: [ClO] is the concentration of ClO [Cl] is the concentration of Cl, and k is the reaction's rate constant

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The molecular formula of the given sample is obtained by the ideal gas equation that is PV=nRT.

here volume given is 3.9L and pressure give n is 2 atm and temperature given is 25 C, amount of the sample given is 25 g. here we put the expression of ,  PV= nRT .then it is found to be 7.7% hydrogen and 92.3% carbon. first we should convert the percentage in to mass. so,7.7% becomes 7.7g and 92.3% become 92.3 gram. Then transform the mass into moles. so H becomes 7.7/1.01= 7.62 mole. and C becomes, 92.3/12.01= 7.69 moles. Then put all these in the relation of empirical formula and molecular formula. Then the molecular formula of the unknown gas can be obtained.

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Answer:

slope = 3

Explanation:

\(slope = \frac{3 - 0}{1 - 0} \\ = 3\)

The frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.

The frequency and wavelength of a wave are related by the following equation:

λf = c

Where λ is the wavelength of the wave in meters, f is the frequency in Hertz, and c is the speed of light in a vacuum.

in this case, λ = 676 nm = 6.76 x \(10^{-7\) m

c = 299,792,458 m/s

Making f the subject of the formula:

f = c/λ

  = 299,792,458/6.76 x \(10^{-7\)

  = 4.43 x \(10^{14\) hertz

In other words, the frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.

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Answer:

There are 2.81 * 10^24 atoms present

Explanation:

To get this, we need to know the number of moles present in 140gramms of carbon.

Mathematically;

number of moles = mass/molar mass

molar mass of glucose is = 180 g/mol

So the number of moles will be ;

140/180 = 0.7778 mole

1 mole of glucose contains 6 moles of carbon;

so 0.7778 moles will contain = 4.667 moles

Mathematically, the number of atoms in 1 mole is 6.02 * 10^23 atoms

The number of atoms in 4.667 moles will be :

4.667 * 6.02 * 10^23 = 2.81 * 10^24 atoms

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