suppose 2.05 liters of gas at 34 °c is under 7.51 × 107 pascals of pressure.

How many moles of gas are there in the system?

The anhydrous magnesium sulfate required to dry a di-ethyl ether solution after performing extractions involving water is enough such that some powder remains free flowing in solution with swirling without clumping.

Extraction is a process which involves transfer of a solute from one phase to another. A cup of tea or coffee prepared represents a process of extraction.The flavor and odor components are extracted from the dried material into the water.

Anhydrous magnesium sulphate works as a drying agent. Magnesium sulfate (MgSO₄) works by forming complex with H₂O in the solvent. It forms a hydrated MgSO₄ precipitate. This precipitate is then filtered out by gravity, which yields an anhydrous product. Due to the high affinity towards water molecules, MgSO₄ removes any amount of water from the extracts.

Due to the presence of an active hydrogen atom, ethyl alcohol reacts with magnesium metal. Diethyl ether, does not have any replaceable hydrogen atom. So, it does not react with magnesium sulfate, therefore, can be dried by anhydrous magnesium sulfate.

Complete question is -

How much anhydrous magnesium sulfate is required to dry a diethyl ether solution after preforming extractions involving water?

Select answer and submit.

a. Enough to cover the tip of your scoopula once

b. 1 g/mL of diethyl ether

c. Enough such that some powder remains free flowing in solution with        

   swirling without clumping

d. Anhydrous magnesium sulfate doesn't dry diethyl ether

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The pH value of the resulting solution assume the volume of the solution is not affected by this addition is 3.283.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

In this Question, HF is a Weak Acid and RbF is a weak Base - HNO3  is a strong acid.

HF reaction in aqueous medium

HF +  H2O  --------- H3O+  + F -  

RbF +  H2O  ----  Rb+ +  F -

pH (Original)  =  pKa  +  log ( [salt ] / [Acid] )  

We donot need to calculate pH original -which is for the original solution before adding the strong acid.

HF is a weak acid - so in a buffer solution its dissociation is negligible - so it does not affect the H+  ion concentration much.

When a 0.012 mol of HNO3  is added to the buffer solution , it dissociates in H+ and NO-3  .

H+ ions dissociated from the Acid react with F -  and produce HF . As a result the acid concentration will increase to the extent of 0.012 mol  and the salt concentration reduces by the same extent - 0.012 mol.

So the formula for New pH changes to

pH (New)  =  pKa  +  log ( [salt ] - 0.012 mol / [Acid] + 0.012 mol)

Here , 0.012 mol are added to 281 mL solution,

Concentration of HNO3,  M = number of moles / Vol in litres  

                                            =  0.012 mol / 281 mL

                                            =  0.012 mol / 281  / 1000

                                           = [0.012 mol x 1000]  / 281 L  =  0.043 M

As pKa = -log(Ka)  ,  

Given  [salt ] =  0.480 M ,  [Acid] =  0.318 M

                   = - log(Ka) +  log [ (0.480 M - 0.043 M) / (0.318 M + 0.043 M) ]

                        =  - log (6.31 x 10-4 )   +  log ( 0.437 / 0.361)

      pH (New)    =  3.20 + 0.083  = 3.283.

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Complete question:

A biochemist wanted to adjust the pH of 281 mL of a buffer solution composed of 0.318 M HF and 0.480 M RbF (K, = 6.31e - 04) by adding 0.012 moles of HNO3. Determine the pH of the resulting solution: pH number (rtol=0.02, atol=1e-08)

Note that the formula for momentum is P = mv, where P is momentum, m is mass, and v is velocity. This being said, simply apply the given data into the formula to find our solution.

\(P=mv\)

\(P=0.4\) × \(19.0\)

\(P = 7.6 kg *m/s\)

Hope this helps!

The molarity of the base would be 0.36 M.

What is Molarity?

The number of moles of dissolved solute per litre of solution is the definition of molarity, a unit of concentration. Molarity is defined as the number of millimoles per millilitre of solution by dividing the number of moles and the volume by 1000. A precise 1.000 mole of KCl (74.55 g) must be dissolved in a quantity of water or another solvent to produce a precise 1.000 litre of solution in order to create a 1.000 M solution of KCl.

In actuality, this concentration unit is frequently abused. Since KCl is totally dissociated, the solution, for instance, with water as the solvent, is exactly 1.000 M in K+ and 1.000 M in Cl.

Recall that: mole = molarity x volume

Also; molarity = mole/volume

Mole of 0.624 M, 27.4 mL HBr = 0.624 x 27.4/1000

                                                 = 0.017 mol

If the mole of HBr is 0.017 mol, the equivalent mole of NaOH will also be 0.017 mol.

0.017 mol of 47.2 mL (0.0472 L) NaOH would molarity of:

0.017/0.0472 = 0.36 M

In other words, the molarity of the NaOH is 0.36 M.

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Because of their differing nuclear charges, and as a result of shielding by inner electron shells, the different atoms of the periodic table have different affinities for nearby electrons.

The electron affinity is the potential energy change of the atom when an electron is added to a neutral gaseous atom to form a negative ion. So the more negative the electron affinity the more favourable the electron addition process is.

Not all elements form stable negative ions in which case the electron affinity is zero or even positive.

Electron affinity depends on the nuclear charge of an atom.

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The emf of the concentration cell is -0.059 V.

The emf of a concentration cell can be calculated using the Nernst equation, which relates the emf of an electrochemical cell to the standard electrode potential and the concentrations of the species involved.

For the cell given: Mg(s) | Mg²+(0.29 M) || Mg²+(0.47 M) | Mg(s)

Assign the anode and cathode to the left and right sides of the cell, respectively:

Anode: Mg(s) → Mg²+(aq) + 2e-

Cathode: Mg²+(aq) + 2e- → Mg(s)

The standard reduction potential of Mg²+(aq) + 2e- → Mg(s) is -2.37 V.

Using the Nernst equation:

Ecell = E°cell - (RT/nF)lnQ

where:

E°cell is the standard cell potential, which is equal to the standard reduction potential of the cathode minus the standard reduction potential of the anode (in this case, it is equal to zero since the anode and cathode are both made of Mg metal).

R is the gas constant (8.314 J/(mol K))

T is the temperature in Kelvin (298 K)

n is the number of electrons transferred in the balanced half-reactions (2 in this case)

F is the Faraday constant (96,485 C/mol)

Q is the reaction quotient, which is equal to the ratio of the concentrations of the products to the concentrations of the reactants, raised to their stoichiometric coefficients.

The reaction quotient for this concentration cell is:

Q = [Mg²+(0.47 M)] / [Mg²+(0.29 M)]

= 1.62

Substituting the values into the Nernst equation,

Ecell = 0 - (8.314 J/(mol K) * 298 K / (2 * 96485 C/mol)) * ln(1.62)

= -0.059 V

Therefore, the emf of the concentration cell is -0.059 V. Since the emf is negative, this means that the reaction is non-spontaneous as written and would require an external energy input to occur.

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Answer:

Pure Water  

Explanation:

Battery acid is well and acid

Bleach is a base

Ocean water is impure so it could lean either way

The balanced equation is: S8 + 12O2 -> 8SO3

The given chemical equation is not balanced. Let's balance it:

S8 + O2 -> SO3

To balance the equation, we start by counting the number of atoms on each side:

Sulfur (S): 8 on the left, 1 on the right

Oxygen (O): 2 on the left, 3 on the right

To balance the sulfur atoms, we need to place a coefficient of 8 in front of the sulfur dioxide (SO3) on the right-hand side:

S8 + O2 -> 8SO3

Now, let's balance the oxygen atoms. We have 2 oxygen atoms on the left side and 3 oxygen atoms on the right side. To balance them, we need to place a coefficient of 12 in front of the oxygen molecule (O2) on the left-hand side:

S8 + 12O2 -> 8SO3

The equation is now balanced, with 8 sulfur atoms on each side and 24 oxygen atoms on each side.

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Answer:

H2S is a hydride of sulfur while SO2 is an oxide of sulfur.

Explanation:

7.63L

According to the Boyle's law;

Given the following parameters

Required

Final Volume V2

Substitute

The volume of her ball at the beach will reduce to 7.63L

One common test for carbon dioxide (CO2) is the limewater test. Here's how it works:

Add a small amount of limewater (a solution of calcium hydroxide in water) to a clear container.

Blow into the container, creating bubbles in the limewater.

Observe the limewater. If carbon dioxide is present, it will react with the calcium hydroxide to form calcium carbonate, which will make the limewater turn cloudy or milky.

This test is often used to detect the presence of carbon dioxide in the breath of a person, as well as in various chemical reactions where carbon dioxide may be produced or consumed.

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Answer:

30

Explanation:

I’m pretty sure it is

Answer:

lowest to Highest

Carbon atom

Methane molecule (CH4)

Graphite

Diamond

Explanation:

A carbon atom would be the lowest complexity on this list, that is because it is a lone molecule with no other bonding between other atoms. The same forces interacting between the carbon atom would be the same for the others.

Next would be methane. Methane is a hydrocarbon composed of a single carbon atom bonded covalently with four hydrogens. The electrons within the hydrogen atoms repel each other causing them to be dispersed around the carbon atom to form a   tetrahedral shape. While more complex, the other two are continuous structures made from carbon atoms bonded to gather to form crystal structures.

Graphite is considered to be a crystal structure, just like a diamond. However, the biggest difference between them is their atomic and crystal frameworks. Diamonds have a rigid 3-dimensional structure whilst graphite is composed of 2d planes of graphite with carbon-carbon double bonds connecting the layers. Due to this, a diamond would be more complex then grpahite

215 grams of AlCl₃ is equal to 1,61 moles of AlCl₃. The relative molecular mass of the compound AlCl₃ is 133.5 grams/mol.

The mole is one of the basic units used to indicate the amount of substance in the international system of units. The equation for calculating moles is mol = mass / relative atomic mass. To find out the mol of AlCl₃ you can use the following steps

Step 1: Calculate the relative molecular mass for the compound AlCl₃.

Mr AlCl₃ = ( Ar Al × ∑Al ) + ( Ar Cl × ∑Cl)

              = ( 27 gam/mol × 1) + ( 35,5 gram/mol × 3)

              = 27 gram/mol + 106,5 gram/mol

             = 133,5 grams/mol

Step 2: Calculate the moles of the compound AlCl₃.

n AlCl₃ = mass AlCl₃ ÷ relative molecular mass AlCl₃

            = 215 grams ÷ 133,5 grams/mol

            = 1,61 mol

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Retention of carbon dioxide (CO2) can lead to the abnormal pH of body fluids, specifically a decrease in pH, resulting in a condition called respiratory acidosis.

Respiratory acidosis occurs when the lungs are unable to remove enough CO2 from the body, leading to an accumulation of CO2 in the bloodstream. This can be caused by various factors, such as lung diseases (e.g., chronic obstructive pulmonary disease, pneumonia), respiratory muscle weakness, airway obstructions, or impaired breathing due to conditions like sleep apnea.

When CO2 builds up in the body, it combines with water in the blood, forming carbonic acid (H2CO3). This process increases the concentration of hydrogen ions (H+) in the blood, leading to a decrease in pH. In other words, the body becomes more acidic.

The abnormal pH resulting from respiratory acidosis can affect the functioning of various bodily systems. It can cause symptoms such as shortness of breath, confusion, headache, fatigue, and even respiratory failure if left untreated.

Treatment for respiratory acidosis focuses on addressing the underlying cause. This may involve improving lung function, providing respiratory support, or treating any underlying medical conditions contributing to CO2 retention.

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Answer: a,

endothermic with the release of energy

Answer:

Pressure, volume and temperature

Explanation:

Ideal gas law

\(\boxed{pV=nRT}\)

where

p= pressure,

V= volume,

n= number of moles,

R= universal gas constant

T= temperature

_____

The ideal gas law is made up of the 4 laws below:

1) Avogadro's law

• The volume of a sample of gas is directly proportional to the number of moles of gas in the sample at constant temperature and pressure

• V∝ n

2) Boyle's law

• The volume of a fixed mass of gas is inversely proportional to its pressure at constant temperature

• p∝ 1/V

3) Charles' Law

• The volume of gas is directly proportional to its absolute temperature at constant pressure

• V∝ T

4) Gay-Lussac's Law

• The pressure of gas is directly proportional to its absolute temperature at constant volume

• p∝ T

The formed cyclopropane has cis stereochemistry.

Chiral cyclopropane rings are important pharmacophores in pharmaceutical drugs and bioactive natural products, so libraries of these building blocks are an important resource for drug research and development campaigns.

A synthesis is a set of two or even more reactions that are designed to produce a specific end product. A synthetic step is a single reaction that has to be carried out independently of the other reactions in a synthesis.

The number of steps inside a synthetic sequence equals the number of reactions that need to be performed separately, i.e. the number of reactions that comprise the sequence.

By stereospecific addi-tion of singlet carbenes, cis cyclopropane could be synthesized from cis alkene. Using a Lindlar catalyst, cis alkene could be synthesized from alkynes.

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The complex ion [CoCl2(NH3)4] can exhibit two types of isomers:

Geometric isomers: These isomers arise from differences in the spatial arrangement of ligands around the central metal ion. In the case of [CoCl2(NH3)4], there are two possible geometric isomers: cis and trans. The cis isomer has two NH3 ligands and two Cl ligands on the same side of the central Co atom, whereas the trans isomer has the NH3 and Cl ligands on opposite sides.

Optical isomers: These isomers arise from the presence of a chiral center in the complex ion, i.e. an atom with four different ligands attached to it. In [CoCl2(NH3)4], there are no chiral centers, so there are no optical isomers.

Therefore, the complex ion [CoCl2(NH3)4] can have two types of isomers: cis and trans geometric isomers.

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Answer:

adrenal

Explanation:

The adrenal glands. (I kid you not)

According to the information of the graph we can infer that if the water were cooled to 5°C the reaction time would be close to 30 seconds.

To establish what would the reaction time be if the water were cooled to 5°C we have to analyze the information of the graph specially the trend. In this case, we have to take into account where are located the point that relate time and temperature.

In this case, the trend is more time with less temperature. So if the water were colled to 5°C, the time would be close to 30 seconds.

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\(▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)

The Correct statement is ~

As we can observe, there's heat in product side of the given equation that shows - In the given reaction heat is released making it an exothermic reaction ~

I hope it helps ¡

\(\mathrm{✌TeeNForeveR✌}\)

Answer:

Chlorine has 17 total electrons with electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5.

What are the first two quantum numbers for the six electrons in the 2p subshell?

Explanation:

The principal quantum number represents the shell number in which the electron is present.

It is represented with "n".

The next quantum number is the azimuthal quantum number.

It represents the shape of the orbital.

It has values from 0 to (n-1).

Its value depends on the principal quantum number.

Chlorine has 17 total electrons with electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5.

For the six elecetrons in 2p subshell:

The first two quantum number values are the same and their values are:

n=2 , l=1.

Answer:i think its Humans can cause some animals to become extinct, changing the food chain.

Explanation:

Answer:

Potassium Hydroxide Solution =

or

Potassium Hydroxide =

Since we know the products and one of the reactions, we can work backward to discover what the other reactant may be.

As it is in the question, we can map the reactants and product:

Reactants                   Product

Ammonium                 Ammonia

Sulfate                         Sulfate

________                   Potassium

________                    Water

Since the reaction will yield Potassium and water, the likely reactant is Potassium Hydroxide (KOH). This is because we know that Ammonium lost a Hydrogen atom that could combine with the Hydroxide radical to form water.

This becomes clear when we consider the net ionic equation:

Ammonium sulphate + Potassium Hydroxide → potassium sulfate + ammonia + water

if we write this a balanced chemical equation:

(NH₄)₂SO₄   +  2KOH  →  K₂SO₄ + 2NH₃ + 2H₂O

if we write the reaction as an ionic equation

2NH₄⁺ + SO₄⁻ + 2K⁺ + 2OH⁻ → 2K⁺ + SO₄⁻ + 2NH₃ + 2H₂O

if we remove the ions that appear on both the reactant and product side (spectator ions)

The balanced chemical equation for this reaction is:
Ba(OH)2(aq) + (NH4)2SO4(aq) → BaSO4(s) + 2H2O(l) + 2NH3(g)

Based on the provided description, the balanced chemical equation for the reaction between aqueous barium hydroxide and aqueous ammonium sulfate is:
Ba(OH)2 (aq) + (NH4)2SO4 (aq) → BaSO4 (s) + 2H2O (l) + 2NH3 (g)
In this reaction, aqueous barium hydroxide (Ba(OH)2) and aqueous ammonium sulfate ((NH4)2SO4) react to produce solid barium sulfate (BaSO4), liquid water (H2O), and ammonia gas (NH3). The balanced chemical equation for this reaction is:
Ba(OH)2(aq) + (NH4)2SO4(aq) → BaSO4(s) + 2H2O(l) + 2NH3(g)

Ba(OH)2 (aq) + (NH4)2SO4 (aq) → BaSO4 (s) + 2H2O (l) + 2NH3 (g)
In this reaction, aqueous barium hydroxide (Ba(OH)2) and aqueous ammonium sulfate ((NH4)2SO4) react to produce solid barium sulfate (BaSO4), liquid water (H2O), and ammonia gas (NH3).

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Answer:

1730 cm

0.00256 km

5130 mm