ΔS is positive for the reaction __________.A. 2H2 (g) + O2 (g) → 2H2O (g)B. CO2 (g) → CO2 (s)C. 2NO2 (g) → N2O4 (g)D. BaF2 (s) → Ba2+ (aq) + 2F- (aq)E. 2Hg (l) + O2 (g) → 2HgO (s)

I believe that the answer is

A) Neutrons

I hope this helps you ^-^

Answer:

neutrons

Explanation:

The absolute molar entropy of aqueous urea (S°) is approximately 322 J/(mol･K).

To calculate the absolute molar entropy (S°) of aqueous urea, we need to use the standard entropy change (∆S°) and the standard molar entropy (S°) of urea.

The equation relating these values is:

∆S° = ΣS°(products) - ΣS°(reactants)

For the dissolution of urea, we have:

∆S°(soln) = S°(urea in solution) - [S°(urea) + S°(water)]

Rearranging the equation and substituting the known values:

S°(urea in solution) = ∆S°(soln) + S°(urea) + S°(water)

S°(urea in solution) = 70.1 J/(mol･K) + S°(urea) + S°(water)

Now, we need the standard molar entropy values for urea and water. The standard molar entropy values for urea (S°(urea)) and water (S°(water)) are usually provided in tables. The value for water is approximately 69.9 J/(mol･K), and the value for urea is around 182 J/(mol･K).

Substituting the values:

S°(urea in solution) = 70.1 J/(mol･K) + 182 J/(mol･K) + 69.9 J/(mol･K)

S°(urea in solution) ≈ 322 J/(mol･K)

To learn more about molar entropy

https://brainly.com/question/32107086

#SPJ4

#4

c is right above the earth's crest so it absorbs most earth .so highest temperature

#5

a is at top hence least heat absorbs so least temperature

#6

The volume of O₂ produced: 84.6 L

Given

7.93 mol of  dinitrogen pentoxide

T = 48 + 273 = 321 K

P = 125 kPa = 1,23365 atm

Required

Volume of O₂

Solution

Decomposition reaction of dinitrogen pentoxide

2N₂O₅(g)→4NO₂(g)+O₂ (g)

From the equation, mol ratio N₂O₅ : O₂ = 2 : 1, so mol O₂ :

= 0.5 x mol N₂O₅

= 0.5 x 7.93

= 3.965 moles

The volume of O₂ :

\(\tt V=\dfrac{nRT}{P}\\\\V=\dfrac{3.965\times 0.082\times 321}{1.23365}\\\\V=84.6~L\)

Measurement is a process of finding a number that shows the amount of something.

Brainliest? Thanks!

Answer:

To solve this problem, we can use the ideal gas law and stoichiometry.

First, we need to convert the given temperature to Kelvin:

208.00 degrees Celsius + 273.15 = 481.15 K

Next, we can use the ideal gas law to find the volume of NH3 produced:

PV = nRT

P = 4.50 torr = 0.00592 atm (converting to atm)

V = unknown (what we are trying to find)

n = moles of NH3 produced = 26.00 moles N2 (from stoichiometry)

R = 0.0821 L·atm/K·mol (gas constant)

T = 481.15 K

Solving for V:

V = nRT/P

V = (26.00 mol)(0.0821 L·atm/K·mol)(481.15 K) / (0.00592 atm)

V = 3671.46 L

However, this is the volume of NH3 produced at standard temperature and pressure (STP), which is 0 degrees Celsius (273.15 K) and 1 atm. We need to convert this to the volume at the given temperature and pressure using the combined gas law:

(P1V1/T1) = (P2V2/T2)

P1 = 1 atm (STP pressure)

V1 = 3671.46 L (volume at STP)

T1 = 273.15 K (STP temperature)

P2 = 0.00592 atm (given pressure)

V2 = unknown (what we are trying to find)

T2 = 481.15 K (given temperature)

Solving for V2:

V2 = (P1V1T2) / (P2T1)

V2 = (1 atm)(3671.46 L)(481.15 K) / (0.00592 atm)(273.15 K)

V2 = 315491.48 L or 315491 L (rounded to two decimal places)

Therefore, 315491 L of NH3 will be produced at a temperature of 208.00 degrees Celsius and 4.50 torr pressure to consume 26.00 moles of N2.

Answer:

Explanation:

2 H₂(g) + O₂(g) → 2 H₂O(g

2 moles     1 mole      2 mole

50 g of H₂ = 50 /2 = 25 moles of H₂

100 g of O₂ = 100 / 32 = 3.125 moles of O₂

So oxygen is the limiting reagent .

3.125 moles of O₂ will react with 6.25 moles of H₂ to give 6.25 moles of H₂O .

Hence moles of H₂O produced = 6.25 moles .

Explanation:

hope the picture above help u understand I did it in step so it would be easier to understand:)

Answer:

if it is hydroxide

Explanation:

when metal. and non-metal most the time reacts and the none metal is hydroxide u can easily say it Is base

Answer:

1.977 g/L

Nitrous oxide

Names

Molar mass 44.013 g/mol

Appearance colourless gas

Density 1.977 g/L (gas)

Melting point −90.86 °C (−131.55 °F; 182.29 K)

A tank contains 8l of water in which is dissolved 32 g (grams) of chemical. a solution containing 2 g/l. The amount of chemical in the tank after 20 minutes is 98.66 g.

Given that:

rate r1 = 4 L/min

rate r2 = 2 L/min

concentration c1 = 2 g/L

V(0) = 8 L

A(0) = 32 g

the equation is given as :

ΔV = r1 Δt - r2Δt

dV/dt = 2

integrating the condition , we get

V(t) = 2(t+4)

ΔA  = c1r1 Δt - c2r2 Δt

dA/ dt = 8-2c2

c2 = A/ V

dA/dt = 8 - 2A/ V

now by putting the value of V, we get

dA / dt + 1 / t + 4 A = 8

linear equation has integrating factor :

I = e^ ∫ 1/( t + 4) dt = t + 4

d [ ( t + 4)A] / dt = 8 (t + 4)

(t+ 4 )A = 4(t + 4)² + c

A(t) = (1 / t + 4 ) [ 4(t + 4)² + c]

A(0) = 32 means c = 64

A(20) = (1/6) [(24)² + 16]

          = 296 / 3

          = 98.66 g

To learn more about rate here

https://brainly.com/question/28034602

#SPJ4

Answer:

Last Column is:

Explanation:

98  ,   7.8   ,   371    and     0.98

Answer:

it equals 2.9 rounded and

2.854331 without rounding

Explanation:

formula= divide length value by 2.54

The concentration of silver ion required to just initiate precipitation is 0.005775 M.

To find the concentration of silver ion required to just initiate precipitation, we need to use the concept of solubility product constant (Ksp). The balanced equation for the reaction between solid silver acetate (AgC2H3O2) and sodium sulfite (Na2SO3) can be written as follows:

AgC2H3O2 (s) + Na2SO3 (aq) → Ag2SO3 (s) + 2NaC2H3O2 (aq)

From the balanced equation, we can see that 1 mole of silver acetate reacts with 1 mole of sodium sulfite to form 1 mole of silver sulfite. Therefore, the stoichiometry of the reaction is 1:1.

To find the concentration of silver ion, we need to calculate the concentration of silver acetate. Since the volume of the sodium sulfite solution is given as 150 mL, we can assume that the final volume of the solution after the reaction is also 150 mL.

The moles of silver acetate can be calculated using the formula:

moles = concentration × volume (in liters)

moles = 0.0385 M × 0.150 L
      = 0.005775 moles

Since the stoichiometry of the reaction is 1:1, the concentration of silver ion is also 0.005775 M.

Therefore, the concentration of silver ion required to just initiate precipitation is 0.005775 M.

Learn more about concentration of silver ion here:-

https://brainly.com/question/27548379

#SPJ11

When Ca+2 is combined with PO4-3, the correct formula is Ca3(PO4)2 to achieve electrical neutrality.

Calcium (Ca) is a metal with a charge of +2, indicated by the +2 superscript. Phosphate (PO4) is a polyatomic ion with a charge of -3, indicated by the -3 superscript. In order to form a neutral compound, the charges of the ions must balance each other.

To achieve electrical neutrality, three Ca+2 ions are needed to balance the charge of two PO4-3 ions. Each Ca+2 ion has a charge of +2, so three Ca+2 ions contribute a total charge of +6. Similarly, each PO4-3 ion has a charge of -3, so two PO4-3 ions contribute a total charge of -6. Therefore, the compound Ca3(PO4)2 ensures that the charges are balanced, resulting in a neutral compound.

In the formula, the subscripts indicate the number of atoms present in the compound. There are three calcium ions (Ca) and two phosphate ions (PO4) present in the compound. The formula Ca3(PO4)2 represents the combination of calcium and phosphate ions in the correct ratio to maintain electrical neutrality.

To know more about electrical neutrality, please click on:

https://brainly.com/question/1688387

#SPJ11

The Lewis structure of the hydrogen cyanide molecule is represented by the image shown.

We know that the Lewis structure is showing us the relationship between the electrons pairs in the compound and its overall properties. The Lewis structure consists of the symbol of the element and the electrons pairs that surround the atom.

We can see that in hydrogen cyanide there is a nitrogen atom and there is a hydrogn atom and also one carbon atom. The bond between carbon and nitrogen is covalent while the bond between hydrogen and the cyanide moiety is covalent.

Learn more about Lewis structure:https://brainly.com/question/20300458

#SPJ1

Answer:

The much higher power density offered by lithium ion batteries is a distinct advantage. Electric vehicles also need a battery technology that has a high energy density. ... Lithium ion cells is that their rate of self-discharge is much lower than that of other rechargeable cells such as Ni-Cad and NiMH forms.

Put this into your own words or teachers will make you redo it

Sodium losses electrons to become Na+, thus forms a cation.

Fluoride gains electrons to become F-, thus forms an anion.

Iron losses electrons to become Fe2+, thus forms a cation.

Silver also losses electrons to be Ag+, thus forms a cation.

The molar mass of CCl₄ is 154 g/mol

Molar mass is the mass in grams of one mole of a substance and is given by the unit g/mol.

It is calculated by taking the sum of atomic masses of all the elements present in the given formula.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Atomic mass of C = 12

Atomic mass of Cl = 35.5

Molar mass = 12 + (35.5 × 4)

= 154 g/mol

Learn more about Molar mass, here:

https://brainly.com/question/12127540

#SPJ1

Answer:

25 ml

Explanation:

it will be 25 ml only

\(\qquad\qquad\huge\underline{{\sf Answer}}\)

According to above statement, HCl ( Hydrochloric acid ) is a strong acid, which when mixed in water dissociates complete in water to form H+ and Cl- ions that means 100% dissociation. but acids weaker than HCl shows relatively less dissociation.

That is less than 100% dissociation when mixed in water ~

This information tells us about the relative dissociation of weaker acids is that weaker acids dissociates less than 100%.

Dissociation is defined as the breaking up of a compound into simpler constituents or components or parts. Ionic compounds dissociates in the water solution. Stronger acids have 100% ability to dissociate.

So we can conclude that this information tells us about the relative dissociation of weaker acids is that weaker acids dissociates less than 100%.

Learn more about acid here: https://brainly.com/question/25148363

#SPJ2

Answer:

national

Explanation:

I don't understand, I'm sorry

Explanation

To find the molar mass of K2Cr2O7 are needed the atomic masses of each element that the molecule contains.

(Please, the periodic table is useful)

The atomic masses:

K) 39.0

Cr) 52.0

O) 16.0

-------

The molar mass = 2 x 39.0 (K) + 2 x 52.0 (Cr) + 7 x 16.0 (O) = 294 g/mol

Answer: A. 294 g/mol

A-) A hypothesis is a tentative explanation, while a theory is a well-supported and comprehensive explanation.

(b) A scientific law describes a concise pattern, while a theory provides a comprehensive explanation for a wide range of phenomena.

A- ) A hypothesis and a theory differ in their level of supporting evidence and scope. A hypothesis is a proposed explanation for a phenomenon that is based on limited evidence and serves as a starting point for further investigation. A theory, on the other hand, is a well-substantiated and comprehensive explanation that has been repeatedly tested and supported by a substantial body of evidence.

(b) A theory and a scientific law differ in their nature and scope. A scientific law describes a concise mathematical or descriptive relationship that consistently holds true under specific conditions. It summarizes observable patterns in nature. In contrast, a theory provides a comprehensive explanation for a broad range of phenomena and incorporates multiple hypotheses, observations, and experimental data. Theories are based on well-established principles and have undergone rigorous testing and peer review, whereas scientific laws are more limited in scope and typically focus on specific mathematical relationships or patterns.

learn more about scientific law here:

https://brainly.com/question/17152046

#SPJ11

Answer:

HClO3 > HBrO3 > HIO3

Explanation:

let's have a quick look at the terminology used in question,

Acidic strength- It is the ability of any molecule to donate H+ ion

Oxyacids- Acids that contain atleast one hydroxy (-OH) group

in the given oxyacids of Halogens, Chlorine is more electronegative than bromine and iodine.

So it will bind the proton (H+ ion) to it more tightly than other halogens hence the Acidic strength of HClO3 is highest among the following.

Thanks for joining brainly community!

Let's consider the following nuclear decay reaction: Uranium-238 → Thorium-234 + Helium-4

In this reaction, Uranium-238 undergoes alpha decay, where it loses an alpha particle (consisting of two protons and two neutrons) to form Thorium-234 and Helium-4.

This means that Uranium-238 has undergone transmutation, as it has transformed into a different element (Thorium-234) through the process of alpha decay.

Transmutation refers to the conversion of one element into another through nuclear reactions.

Thus, in this case, the uranium nucleus has transformed into a thorium nucleus, which is a different element with a different number of protons. Therefore, the decay reaction involves transmutation.

For more details regarding nuclear decay, visit:

https://brainly.com/question/12224278

#SPJ1

Your question seems incomplete, the probable complete question is:

Use the nuclear decay reaction

\(^1_0n+^{235}_{92}U--- > ^{141}_{56}Ba+^{92}_{36}Kr+3^1_0n\)

to answer the following questions. Does undergo transmutation? Explain your answer.

Answer:

convection

Explanation:

it is heat transfer, and convection is 1 way of it

Answer:

20. mol

Explanation:

i got it right on my quiz

Answer:

8.5mL

Explanation:

According to the question, a transfer pipette contains 15.23 mL of water. 6.7 mL of water is drawn out of it, this will give :

= 15.23 - 6.7

= 8.53

However, observing the measurements, 15.33mL, which is the initial volume of water in the transfer pipette has 4 significant figures (4 s.f) while the final volume after transference is 6.7 mL, which is in 2 significant figures.

In addition/subtraction, the digit with the lowest number of significant figures will determine the outcome it result.

Hence, 8.53 (3 s.f) will be reported as 8.5 (2 s.f).

Therefore, the final volume is 8.5 mL