A balloon is filled with 3. 00 l of helium at a pressure of 765 torr. What is the volume of the balloon at an altitude where the pressure is 530 torr if the temperature remains constant?

The solubility product, ksp of PbBr₂ is 2.102 × 10⁻⁶

The solubility of a solute is defined as the maximum amount of that solute that can be dissolved in a known quantity of solvent at a given temperature.

Some salts are sparingly soluble in a solvent. For them, we calculate the solubility product.

It is an equilibrium constant that defines the relationship between a solid and its respective ions in an aqueous solution in equilibrium.

The greater the solubility product, the greater the solubility and vice versa.

Here, the solubility of PbBr₂ = 2.96 g/l

Molar solubility of  PbBr₂ = [tex]\frac{2.96}{molar mass of PbBr_2}[/tex] = 2.96/367 = 8.07 × 10⁻³

At equilibrium,

[tex]PbBr_2\rightarrow Pb^{2+} + 2Br^-[/tex]

1 mole of PbBr2 dissociates into 1 mole of Pb²⁺ ions and 2 moles of Br⁻

Let the molar concentration of Pb²⁺ be x, then the molar concentration of Br⁻ is 2x

Ksp = x.(2x)²

       = 4x³

Substitute, x = 8.07 × 10⁻³

Ksp = 4 (8.07 × 10⁻³)³

      = 2.102 × 10⁻⁶

Thus, The ksp of PbBr₂ is 2.102 × 10⁻⁶

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Answer:

Hi there. In this question, we are trying to classify this reaction type. What we see happening here is we're told that we have sulfur which is in its solid state and it is reacting with solid iron And they're going to produce solid Iron three sulfide. So that is going to be f. E two S. Three. And that is a solid. I know it was F. E two S. Three because the iron three tells us the charge on the iron is three plus and sulfur voice forms ions with a too negative charge. Therefore it has to be FE two S 3. We can balance this equation although that's not necessary for this problem. But it's kind of quick. So I'll go ahead and do that. Okay, but we want to know what type of reaction it is. So we're looking for a pattern here when we see an element sulfur, it's combining with another element iron and it's producing a compound. So only one product. Alright, so looking at this general reaction type, there's only one reaction type of those five listed there, there's only one reaction type that has just one product and that is a synthesis reaction. A synthesis reaction follows this pattern where we are taking two or more simpler substances and combining them to make more complex compounds. Alright, with the simplest synthesis being element plus element equals compound. So this would be a synthesis reaction. Thank you for asking a question. And I hope this was helpful

Answer:

It should be D) Combustion Reaction

The NMR spectroscopy will be used for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane.

A spectroscopic method for observing the local magnetic fields surrounding atomic nuclei seems to be nuclear magnetic resonance spectroscopy, also referred to as magnetic resonance spectroscopy as well as NMR spectroscopy.

The identification and study of organic molecules benefit greatly from nuclear magnetic resonance (NMR) spectroscopy. This type of spectroscopy has a straightforward underlying theory. Numerous atom types' nuclei behave like small magnets and frequently align themselves in magnetic fields.

Therefore, the NMR spectroscopy will be used for distinguishing a sample of 1,2-dichloropropane from 1,2-dibromopropane.

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Answer:

homogenous mixture

Explanation:

homogenous mixtures appear in one phase and have even particle distribution.

Answer:

Air is indeed a homogeneous mixture of dinitrogen, dioxygen, carbon dioxide and a few other gases. All of the gases are in the same phase, and thus constitute a homogeneous mixture.

Explanation:

Heya....

Here's your answer.....

PV = nRT... R is a constant...

so PV/nT = constant...

P1V1 / n1T1 = P2V2 / n2T2...P is constant.T is constant.. so

V1 / n1 = V2 / n2

since n = mass / mw

V1 / (mass 1 / mw) = V2 / (mass 2 / mw)

and since molecular mass = constant

V1 / mass 1 = V2 / mass 2

mass 2 = V2 x mass 1 / V1 = 2.90L x 2.00 g / 2.00 L = 2.9 g

mass 2 - mass 1 = 2.90 g - 2.00 g = 0.90 g

ie.. 0.90 g of He was added.

Thanks...!!!

We know that,

acceleration (a) = final velocity(V)-initial velocity(U)/ Time taken(T)

The molality of phosphoric acid, h3po4, in a solution prepared from 376 g of phosphoric acid and 1. 70×103 g of ethylene glycol, c2h4(oh)2 is 2.25m.

Ethylene Glycol is known as C2H4 (OH)2.

It is used to prepare Antifreeze solution by adding water in it.

Given,

Mass of phosphoric acid = 376g

Mass of ethylene acid = 1.7 × 10 3g

Since ethylene glycol is in excess. So it is acts as a solvent and phosphoric acid acts as solute

As we know that,

Molar mass of phosphoric acid = 98g

Moles of phosphoric acid

= Given mass / Molar mass

=376 / 98

= 3.83

Molality is defined as the ratio of moles of solute to the mass of solvent.

Molality = Moles of solute / Mass of solvent

= 3.83 / 1.7 kg

= 2.25m.

Thus, we found that the molality of phosphoric acid is 2.25m.

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The standard free energy change ΔG° at 600 K is equal to  1. 4×[tex]10^5[/tex]J/mol then the equilibrium constant at 600K is 0 .

Calculation ,

ΔG° = - RT㏑Kp

Where ΔG° = standard free energy change =  1. 4×[tex]10^5[/tex]J/mol

R = universal gas constant  = 8.3 J / K mol

T = temperature = 600K

Kp  = equilibrium constant

Now putting the value of all data in equation (i) we get ,

1. 4×[tex]10^5[/tex]J/mol = - 8.3 J / K mol × 600K ㏑Kp

- 1. 4×[tex]10^5[/tex]J/mol /8.3 J / K mol × 600K  = ㏑Kp

㏑Kp = - 6972×[tex]10^5[/tex]

Kp = 0

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Answer:

0.481 M

Explanation:

The molarity ratio looks like this:

Molarity = moles / volume (L)

Since you have been given both the mass and volume, you can plug them into the equation to find the molarity.

Molarity = moles / volume

Molarity = 0.650 moles / 1.35 L

Molarity = 0.481 M

The mass of nickel metal deposited on the cathode is 2.004 g.

When an ionic compound is decomposed into its elements by passing a direct electric current using a compound in its liquid form. The process is known as electrolysis.

At the cathode, cations are reduced and at the anode, anions are oxidized.

The main components used in the process of electrolysis are

Current passed through the solution, I = 0.150 A

Time, t = 12.2 hrs = 12.2×60×60 = 43920 sec

Charge, q = It = 0.150 × 43920 = 6588 C

At cathode,

[tex]Ni^{2+}(aq) + 2e^- \rightarrow Ni(s)[/tex]

Nickel metal deposited by (2×96487 C) = 58.7g

Nickel metal deposited by 6588 C = [tex]\frac{58.7 \times 6588 }{2\times96487}[/tex] = 2.004 g

Hence, The mass of nickel metal deposited on the cathode is 2.004 g.

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The number of moles of the gas is 0.0396 moles.

The ideal gas equation is used to determine the relationship between the variables; temperature, pressure, volume and the number of moles of a gas. We know that the gas laws are used to understudy the parameters that has to do with gases.

Thus;

Volume = 1000.0 cm 3 or 1 L

Gas constant = 0.082 atmLK-1Mol-1

Temperature = 32 o C + 273 K = 305 K

Pressure =  752 mm Hg  or 0.99 atm

Thus;

PV = nRT

n = PV/RT

n =  0.99 atm *  1 L/0.082 atmLK-1Mol-1 * 305 K

n = 0.0396 moles

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The primary organic product is a 1:1 mixture of enantiomeric ethers when cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride. The correct option is B.

Cyclohexene is a hydrocarbon with the formula C₆H₁₀ . It has no color and a pungent scent. It is a necessary element in a number of industrial processes. It is not a stable compound.

One butadiene will exist in the s trans form rather than the s-cis form because the energy of s trans is lower than that of s-cis trans.

Thus, the correct option is B) a 1:1 mixture of enantiomeric ethers.

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The question is incomplete. Your complete question is given below:

A) a meso ether.

B) a 1:1 mixture of enantiomeric ethers.

C) a meso diol.

D) a 1:1 mixture of enantiomeric diols.

E) methoxycyclohexane.

Molar concentration of Sodium chloride (NaCl) means the number of moles of sodium chloride present in 1L of water.

Molar mass of NaCl = Molar mass of Na + Molar mass of Cl

Molar mass of NaCl = 23 + 35.5

Molar mass of NaCl = 58.5g

∴ 1L of water contains 55.55 moles of water. Hence,

Mass of ocean water = 55.55 × 18 = 999.9g

Since, 1L of ocean water has a mass of 999.9g of which 3.5% is the salt.

hence, (999.9) (0.035) = 34.99g

So, No. of moles of NaCl = Mass of NaCl / 58g NaCl per mol

No. of moles of NaCl = 34.99/58.5

No. of moles of NaCl = 0.59 moles

So, Molar concentration or Molarity would be 0.59 moles present in 1L of solution.

Hence, Molarity or Molar Concentration = Moles of NaCl/ Volume of solution (in L)

Molarity = 0.59/1L

⇒ Molarity = 0.59M

Hence, the molarity is 0.59M

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Answer:

c )   16

Explanation:

C4 H10 O    +   6 O2  =====>  4  CO2  +   5  H2O

1 + 6 + 4 + 5 = 16

Answer:

C.) 16

Explanation:

An equation is balanced when there are equal amounts of each element on both sides of the reaction. These values can be modified by adding coefficients.

The unbalanced equation:

C₄H₁₀O + O₂ -----> CO₂ + H₂O

Reactants: 4 carbon, 10 hydrogen, 3 oxygen

Products: 1 carbon, 2 hydrogen, 3 oxygen

The balanced equation:

1 C₄H₁₀O +  6 O₂ -----> 4 CO₂ + 5 H₂O

Reactants: 4 carbon, 10 hydrogen, 13 oxygen

Products: 4 carbon, 10 hydrogen, 13 oxygen

Now, you can add the coefficients:

1 + 6 + 4 + 5 = 16

Dalton's law of partial pressures

The total pressure by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases.

Dalton's law, which states that a gas mixture's overall pressure is equal to the sum of its component gases' partial pressures. The pressure that each gas would produce if it occupied the same volume of the mixture by itself at the same temperature is known as the partial pressure.

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The solubility KI is 50 g in 100 g of H₂O at 20 °C. if 110 grams of ki are added to 200 grams of H₂O the solution will be saturated.

Solubility is a condition where the solute is fully dissolved in the solvent. When fully mixed with the solvent.

Given that 50 g of KI is added to 100 g of water at 20 °C it means 100 g of water can dissolve a maximum of 50 g of  KCl.

1 g of water will dissolve an quantity of 0.5 g of  KCl.

To assay for 200 g of water: 200 g of water can disintegrate a maximum of (0.5) x 200 g of  KCl.

The maximum amount of KCl that will dissolve is 100 g

Actualised amount dissolved = 110 g

when Amount dissolved > Maximum solubility limit

110 g > 100 g

Thus,  the solution is saturated.

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Represents a contraindication to the administration of nitroglycerin increased intracranial pressure

Nitroglycerin is a vasodilator that is primarily used to treat anginal chest discomfort. It is now licensed by the FDA for the acute alleviation of an attack or the acute prevention of angina pectoris caused by coronary artery disease.

Nitroglycerin is used to treat coronary artery disease-related angina (chest pain). This medication can also be used to treat an existing angina attack. Nitroglycerin is a common treatment for heart problems. It's the go-to medication for people suffering from angina pectoris, who take it as a sublingual tablet or an oral spray.

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1. The empirical formula of the compound is Ti₂O₃

2. The correct answer to the question is: smallest whole-number ratio of the atoms (Option C)

3. The correct answer to the question is: orange-brown (Option A)

4. The empirical formula of the compound is KClO₂

5. The empirical formula of the compound is P₂O₅

Divide by their molar mass

Ti = 66.6 / 48 = 1.3875

O = 33.4 / 16 = 2.0875

Divide by the smallest

Ti = 1.3875 / 1.3875 = 1

O = 2.0875 / 1.3875 = 3/2

Multiply by 2 to express in whole number

Ti = 1 × 2 = 2

O = 3/2 × 2 = 3

Thus, the empirical formula of the compound is Ti₂O₃

This is the simplest formula of a compound which shows the smallest whole number ratio of the atoms present in the compound

With the above definition, we can conclude that the correct answer to the question is: smallest whole-number ratio of the atoms (Option C)

In the tin oxide laboratory activity, the colour of the vapor emitted when nitric acid is added to the tin is: orange-brown

NOTE: This colour is visible when we carryout the practical experiment

Thus, the correct answer to the question is orange-brown (Option A)

Divide by their molar mass

K = 36.6 / 39 = 0.9385

Cl = 33.2 / 35.5 = 0.907

O = 29.9 / 16 = 1.8688

Divide by the smallest

K = 0.9385 / 0.907 = 1

Cl = 0.907 / 0.907 = 1

O = 1.8688 / 0.907 = 2

Thus, the empirical formula of the compound is KClO₂

Divide by their molar mass

P = 43.6 / 31 = 1.406

O = 56.4 / 16 = 3.525

Divide by the smallest

P = 1.406 / 1.406 = 1

O = 3.525 / 1.406 = 5/2

Multiply by 2 to express in whole number

P = 1 × 2 = 2

O = 5/2 × 2 = 5

Thus, the empirical formula of the compound is P₂O₅

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The number of atps generated is 330 ATP

At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up the structure of ATP, which is a nucleoside triphosphate.

Glycerol provided us with 2 ATP and 2 NADH. In b-oxidation, we obtained 8 NADH and 8 FADH from each fatty acid, but since there were 3 fatty acids, we also produced 24 NADH and 24 FADH. We used 24 acetyl-CoA molecules, which were converted into 24 ATP, 24 FADH, and 72 NADH molecules by the citric acid cycle. You should obtain the same figures after adding everything up.

80 NADH x 3 ATP/NADH = 240 ATP

32 FADH x 2 ATP/FADH = 64 ATP

102 + 64 + 26 ATP = 330 ATP.

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In aqueous solutions, the hydrogen ion, also known as the hydronium ion, is a Bronsted-Lowry acid, while the hydroxide ion is a base as a result of the self-dissociation reaction.

        [tex]C_4H_5N(aq) + H_2O(l)[/tex] ⇄ [tex]C_4H_5NH (aq) + OH^-(aq)[/tex]

        [tex]Bronsted-\\Lowry Acid[/tex]                    [tex]Conjugate Acid[/tex]

Any species that may transfer a proton (H+) to another molecule is a Brnsted-Lowry acid. Any species that can take a proton from another molecule is a Brnsted-Lowry base. In essence, a Brnsted-Lowry base is a proton acceptor (PA) and an acid is a proton donor (PD).

According to the Arrhenius theory, acids are defined as chemicals that dissociate in an aqueous solution to produce hydrogen ions (H+), whereas bases are defined as substances that produce OH (hydroxide ions).

The hydrogen ion, or hydronium ion, is a Brønsted–Lowry acid in aqueous solutions, and the hydroxide ion is a base, by virtue of the self-dissociation reaction.

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Answer:

.0017952905 mol

Explanation:

I hope this helps, I can't promise I got it right, please let me know haha!

The pressure in atm is 6.8.

Calculation,

According to ideal gas law,

PV = nRT           ..(i)

Putting the value of all given data in equation (i) we get,

P×5.43 L =  1.82 moles ×247.50 K × 0.082 atm L/K mol

P =  1.82 moles ×247.50 K × 0.082 atm L/K mol /5.43 L = 6.8 atm

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D.Acute Viral Hepatitis

inflammation of the liver caused by infection with one of the five hepatitis viruses

Hope it helps (≧∇≦)/

Hello its me Sanya yadav

When a 45-minute road trip a vehicle emitted 16.7 g of nitrogen dioxide (NO₂) from its exhaust then the mass of nitrogen atoms in this amount of NO₂ would be 5.082 grams.

The chemical compound is a combination of two or more either similar or dissimilar chemical elements.

for example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom

The molecular mass of any compound is calculated by the sum of the mass of the individual atom

As given in the problem In a 45-minute road trip a vehicle emitted 16.7 g of nitrogen dioxide (NO₂) from its exhaust

The molecular mass of the NO₂ is the sum of the mass of the nitrogen atom and the oxygen atom.

The mass of the single nitrogen atom is 14, while the mass of the single oxygen atom is 16

the molecular mass of NO₂= mass of the N atom+2×(mass of O atom)

                                     = 14 + 2×16

                                     =46

As 46 grams of NO₂ contain 14 grams of Nitrogen

then 1 gram of NO₂ would  contain 14/46  grams of Nitrogen

then 16.7 grams of NO₂ would  contain (14/46×16.7)  grams of Nitrogen

The mass of a nitrogen atom in 16.7 grams of NO₂ would be 5.082 grams

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True

The bare minimum required standard

The minimal necessary standard restricts uses, disclosures, and requests for PHI to the bare minimum amount required to fulfil the use's or disclosure's intended purposes.

Under the Privacy Rule's Minimum Necessary Standard, covered entities are required to take all necessary precautions to ensure that protected health information (PHI) is only accessed as much as is required to carry out the duties at hand.

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Selective serotonin reuptake inhibitors (SSRIs) are drugs that are antidepressants. These blocks the reuptake of a neurotransmitter leading to increases in their activity in the synaptic cells.

Neurotransmitters are defined as the signaling molecules that are secreted by the nerve cells and act as signal transporter between the neurons and the other cells of the body.

The SSRIs class of drugs affects this neurotransmitter and blocks the pathway to the presynaptic cell. This, in turn, affects synaptic communication by increasing the amount of those SSRIs in the body and acting as a stimulant to treat various diseases.

Therefore, the SSRIs block the neurotransmitter and result in their effects.

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The moles of hydrogen in the talc sample are 5.67 moles.

Talc are the hydrous silicate minerals. The chemical formula of talc is Mg₃Si₄O₁₀(OH)₂.

From the formula it can be determined that there are: 3 moles of Mg, 4 moles of Si, 12 moles of O and 2 moles of H.

Moles are a type of SI unit of measurement of the amount of substance.

According to the question, magnesium = 8.5 moles

Also, 3 moles of Mg = 2 moles of H

Therefore, moles of H = 8.5 moles × (2 moles H / 3 moles Mg)

                 moles of H = 5.67 moles

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