Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as gaining heat from the surroundings? A)q-t,w Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter. The reaction causes the temperature of the resulting solution to fall below room temperature. Which of the following statements is TRUE? A) The products have a lower potential energy than the reactants. B) This type of experiment will provide data to calculate AErxn C) The reaction is exothermic. D) Energy is leaving the system during reaction. E) None of the above statements are true.

The Vant Hoff factor as\(K_2}\)S break into in water is 3

What does vant Hoff factor mean?

The ratio of a substance's mass concentration to the concentration of the particles that are produced when it dissolves is known as the Van't Hoff factor. The Van't Hoff factor describes how much a substance associates or dissociates in a solution.

The ratio of the final moles following dissociation or association to the beginning moles before to dissociation or association of an electrolyte in a solution is known as the Van't Hoff factor. The solute's property governs the number of particles, which is independent of the solution's concentration.

\(K_2}\)S ⇒ 2K+ + \(S_2}\)-

\(K_2}\)S dissolves into 3 particles .

To learn more about Van't Hoff factor use:

brainly.com/question/8837607

#SPJ1

The Vant Hoff factor as \(K_{2}S\) break into in water is 3

What does vant Hoff factor mean?

The ratio of a substance's mass concentration to the concentration of the particles that are produced when it dissolves is known as the Van't Hoff factor. The Van't Hoff factor describes how much a substance associates or dissociates in a solution.

The ratio of the final moles following dissociation or association to the beginning moles before to dissociation or association of an electrolyte in a solution is known as the Van't Hoff factor. The solute's property governs the number of particles, which is independent of the solution's concentration.

\(K_{2}S\) ⇒ 2K+ + -\(S_{2}\)

\(K_{2}S\) dissolves into 3 particles .

To learn more about Van't Hoff factor use:

brainly.com/question/8837607

#SPJ1

When 22.2g of NH₃ reacts with an excess of fluorine, 26.0 g of HF form. The balanced equation for this reaction is: NH₃ + F2 → HF + NHF₂

1. Calculate the molar mass of NH₃ and HF; Molar mass of NH₃ = 14.01 + 1.01 × 3 = 17.04 g/mol Molar mass of HF = 1.01 + 18.99 = 20.00 g/mol

2. Determine the number of moles of NH₃ used. Moles of NH₃ = 22.2 g ÷ 17.04 g/mol = 1.30 mol

3. Find the limiting reactant NH₃ + F₂ → HF + NHF₂

For every mole of NH₃ that reacts with F₂, one mole of HF is produced. Therefore, 1.30 mol of NH₃ will produce 1.30 mol of HF.

4. Calculate the number of moles of HF formed. Number of moles of HF = number of moles of NH₃ used = 1.30 mol5. Calculate the mass of HF formed. Mass of HF = number of moles × molar mass= 1.30 mol × 20.00 g/mol= 26.0 g

Therefore, 22.2g of NH₃ reacts with an excess of fluorine to form 26.0 g of HF.

To know more about fluorine, refer

https://brainly.com/question/15045637

#SPJ11

Answer:

The molarity will be "0.26 M".

Explanation:

The given values are:

Mass,

= 2.00 g

Volume of solution,

= 100 mL

or,

= \(\frac{100}{1000}\)

= \(0.1 \ L\)

Molar mass of KCl,

= 74.5 gm

Now,

Moles of KCl will be:

=  \(\frac{Given \ mass}{Molar \ mass}\)

=  \(\frac{2}{74.5}\)

=  \(0.026\)

hence,

The molarity will be:

=  \(\frac{Moles \ of \ solute}{Volume \ of \ solution}\)

On substituting the values, we get

=  \(\frac{0.026}{0.1}\)

=  \(0.26 \ M\)

Answer:

The feedback mostly on the scenario mentioned is defined downwards.

Explanation:

There seem to be forces that regulate the whole mechanism as well as preserve equilibrium in every natural cycle. It is possible to divide these variables into two simple types:

The improvement throughout the natural state is attempted by negative factors as well as the positive reinforcement attempts to mitigate this improvement and approach the problem to something like the primary comfortable position.

Let's take a basic example including its process for suggestions. Users start whimpering if you get too cold. Your body continues to pump additional blood attributable to the whole shivering and indeed the temperature therefore raises. Throughout this circumstance, the temperature drop is a mechanism that serves to initiate the shivering, as well as the shivering attempts to recover the steady body’s temperature. Therefore the shivering case seems to be positive feedback that seeks to restore the primary balance.

Much the same for the landmass uplifting allows the emergence of more life above it. So, social advancement seems to be a system of negative criticism that disturbs the equilibrium. After that, the main elevation of the landform needs to regain the excess volume of degradation. So, this is indeed a tool for constructive feedback.

Answer:

I am expecting that is option is d is correct answer

Explanation:

because in the grassland some animals can live

Answer:

Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell. Metallic character increases as you move down an element group in the periodic table. This is because electrons become easier to lose as the atomic radius increases, where there is less attraction between the nucleus and the valence electrons because of the increased distance between them.

(19) The potential energy of the piano is 14700 J.

(20) The height of the cannon ball is 35.71 m.

This can be defined as the energy of a body due to its position in the gravitational field.

(19) To calculate the potential energy of the piano, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values intyo equation 1

(20) To calculate the heigth of the cannon ball we use the formula below.

From the question,

Given:

Substitute these values into equation 2

Hence, (19) The potential energy of the piano is 14700 J and (20) The height of the cannon ball is 35.71 m

Learn more about potential energy here: https://brainly.com/question/14427111

#SPJ1

IBUPROFEN-400MG + PARACETAMOL-325MG is the scientific name Flexon.

Flexon is the trademark for a shape memory alloy of titanium that is used to make eyeglass frames.

The metal alloy used by Flexon in their eyewear was actually destined for a very different path when, in 1961, US Naval Scientists creating a missile heat shield discovered that the alloy they were using automatically returned to its original shape, even after being hit by a hammer.

Flexon is the trademarked name for a special material that is used to make frames for spectacles. It is light and extremely flexible. If it is bent it will 'remember' its original shape and return to it.

Flexon eyeglasses are all made of memory metal titanium.

Learn more about Flexon here:

brainly.com/question/1835562

#SPJ1

The volume of a gas is directly proportional to its temperature when pressure and moles remain constant. As the temperature increases, the volume of nitrogen gas also increases. Hence, the correct option is (D) i.e. 5.59 L.

To solve this problem, we can use the combined gas law:

(P1V1)/T1 = (P2V2)/T2

where P is pressure, V is volume, and T is temperature. We can assume that the pressure remains constant, as the problem states that the container is flexible.

Given:

V1 = 5.00 L

T1 = 298 K

T2 = 333 K

We need to find V2 of nitorgen.

(P1V1)/T1 = (P2V2)/T2

V2 = (P1V1T2)/(P2T1)

We can assume that the pressure remains constant, so P1 = P2. Therefore, we can simplify the equation to:

V2 = (V1T2)/(T1)

V2 = (5.00 L)(333 K)/(298 K)

V2 = 5.59 L

Therefore, the correct option is (D) 5.59 L.

To know more about nitrogen please refer: https://brainly.com/question/13907528

#SPJ1

Subtract the bond energy of the products from the bond energy of the reactants to find the overall change in bond energy for the reaction H2(g) + Cl2(g) -> 2HCl(g).

Connection energy is the amount of energy needed to break a chemical bond. Reference tables include the bond energy values for each bond in the reactants and products.

The reaction is exothermic (release energy) if the bond energy of the products is larger than the bond energy of the reactants, and the difference indicates the quantity of energy released. If the product bond energy is smaller than the reactant bond energy, the reaction is endothermic (absorbs energy), and the difference denotes the quantity of energy absorbed.

As a result, if the computed total change in bond energy is negative, the reaction is exothermic; otherwise, it is endothermic.

For more questions on endothermic or exothermic reaction

https://brainly.com/question/13014923

#SPJ4

These type of explosives are called improvised explosive.

What is explosive?

explosive means exploding or able to explore easily.certain gases are high explosive. There was an explosive calp of thunder overhead.

Sol-Some improvised explosive are hyperbolic. This means that when two of particular chemicals constituents are brought to together they can react with violently with each other, with the surrounding to the  atmospheric temperature  often being to the catalyst for the reaction. The reaction of the produces either a fire or an explosion.

To know more about explosive click-

https://brainly.com/question/14891420

#SPJ4

The intermolecular forces present in ferrocene are dispersion and dipole-dipole forces. Option B is the correct answer.

Ferrocene has a symmetrical, sandwich-like structure with two cyclopentadienyl rings on either side of a central iron atom. The cyclopentadienyl rings have delocalized pi-electron density, which creates a dipole moment in the molecule.

Additionally, the molecule has a large surface area, which results in strong dispersion forces. Therefore, the dominant intermolecular forces present in ferrocene are dipole-dipole forces and dispersion forces.

Option B is the correct answer: "Dispersion and dipole-dipole forces."

You can learn more about intermolecular forces at

https://brainly.com/question/12243368

#SPJ11

Answer:

Burning wood

Explanation:

Burning wood is a chemical change. Dissolving sugar is a physical change because it is still sugar, just dissolved. A broken bottle a physical change because it is just broken. Melting wax is a physical change because it is still wax, just melted. Burnt wood is a chemical change because it is now ash

Answer:

breaking a bottle

Explanation:

45 N

Are you doing a quizlet?

Answer:

C Evidence of Physical change

Explanation:

Because Solid forms is a physical change and so are all the other ones    

A voltaic cell is an electrochemical cell that uses spontaneous redox reactions to generate electrical energy. A Cu/Cu2+ half-cell and an Hg/Hg2+ half-cell are included in the voltaic cell. The Cu2+ + 2 e− → Cu reaction has a standard potential of +0.34 V, whereas the Hg2+ + 2 e− → 2 Hg reaction has a standard potential of +0.79 V.

A voltaic cell is an electrochemical cell that uses spontaneous redox reactions to generate electrical energy. A Cu/Cu2+ half-cell and an Hg/Hg2+ half-cell are included in the voltaic cell. The Cu2+ + 2 e− → Cu reaction has a standard potential of +0.34 V, whereas the Hg2+ + 2 e− → 2 Hg reaction has a standard potential of +0.79 V.

Net reaction of voltaic cell: Hg2+ + Cu → Hg + Cu2+

The spontaneous reaction for this voltaic cell can be written as follows: Hg2+ + Cu → Hg + Cu2+

We'll utilize the Nernst equation to calculate the cell potential since the standard reduction potentials for both half-cells are supplied. The equation for the Nernst equation is as follows: E = E° − (RT/nF) * ln(Q)

We'll utilize the following values to calculate the potential of the cell: E°cell = E°reduction (reduction half) - E°reduction (oxidation half)

E°cell = E°reduction (cathode) - E°reduction (anode)

E°cell = 0.79 - 0.34

E°cell = 0.45 Volts

Ecell = E°cell - (0.0592/n) * log(Q)

Ecell = 0.45 - (0.0592/2) * log (1/[Cu2+])

The given half-cell reactions indicate that there is 1 mol of Cu2+ for every 1 mol of Hg2+ reacting. As a result, Q = [Cu2+].

Ecell = 0.45 - (0.0592/2) * log (1/[Cu2+])

Ecell = 0.45 - (0.0296) * log (1/[Cu2+])

Ecell = 0.45 - (0.0296) * log (1/1)

Ecell = 0.45 V (rounded to 2 decimal places).

Hence, the answer is 0.45 V.

To know more about electrochemical cell visit:

https://brainly.com/question/31149864

#SPJ11

PLEASE MARK ME BRAINLIST! HAVE A NICE DAY! HAPPY PRIDE MONTH!

Answer:

I think the answer is created; destroyed; conserved.

Explanation:

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed.

Answer:

option 3) They have no freedom to move

Answer:

C

Explanation:

This one is from G_oogle

The Milkmaid and Her Pail

A farmer's daughter had been out to milk the cows, and was returning to the dairy carrying her pail of milk upon her head. As she walked along, she fell a-musing after this fashion: "The milk in this pail will provide me with cream, which I will make into butter and take to market to sell. With the money I will buy a number of eggs, and these, when hatched, will produce chickens, and by and by I shall have quite a large poultry-yard. Then I shall sell some of my fowls, and with the money which they will bring in I will buy myself a new gown, which I shall wear when I go to the fair; and all the young fellows will admire it, and come and make love to me, but I shall toss my head and have nothing to say to them." Forgetting all about the pail, and suiting the action to the word, she tossed her head. Down went the pail, all the milk was spilled, and all her fine castles in the air vanished in a moment!

- Do not count your chickens before they are hatched.

I tried to make my own but it turned out bad...

Hope this helps ❤️

Answer:

Become Visible

Explanation:

Answer:

32.711

Explanation:

1 yard = 0.0009144 km

1 week = 168 hrs

6.01 x 10^6 / 168 = 35,773.81 yds/hr

                            =  32.711 km/hr    

Answer:

Label A is showing the wavelength while label B is showing the amplitude.

Explanation:

Diffusion of compounds – e.g. ions, atoms, or molecules – down a gradient is spontaneous because it involves a natural tendency towards increasing disorder. The movement of compounds, whether they are ions, atoms, or molecules, is due to a difference in concentration gradient.

This gradient creates a net movement of molecules down the concentration gradient as a result of the random thermal motion of the particles in the substance.The movement of ions, atoms, and molecules is important in many natural and artificial processes, including the movement of oxygen and carbon dioxide in living organisms and in the diffusion of molecules across a semipermeable membrane in the process of osmosis. Diffusion is driven by the natural tendency towards disorder, which results in an increase in entropy, or the measure of the disorder in a system.For example, when a bottle of perfume is opened, the fragrance spreads throughout the room. This is due to the natural process of diffusion where the molecules of the perfume move from an area of higher concentration to an area of lower concentration. Similarly, when a drop of ink is placed in a glass of water, the ink molecules spread out and mix with the water due to diffusion.This movement of molecules is a spontaneous process because it does not require any energy input. In fact, energy input is required to oppose the diffusion process. Diffusion of compounds is also an important process in the study of chemical reactions and is used to measure the rate of reaction.

For more information on semipermeable visit:

brainly.com/question/737703

#SPJ11

12 moles O2 is a possible way to describe the elemental oxygen component in the reaction.

Define elemental oxygen form?

At normal temperatures and pressures, elemental oxygen is present as a gas, most frequently in the form of O2. This crucial ingredient, which is a crucial part of cellular respiration, is required for life on this planet.

This oxidation-reduction (redox) reaction is taking place:

8 S - 48 e- → 8 S (oxidation)

24 O + 48 e- → 24 O- (reduction)

O2 is an oxidizing agent, whereas S8 is a reducing agent.

Because each substance contains a huge number of atoms and molecules, we use the mole (mol) to express the amount of substances in chemistry. For the researcher who discovered how many atoms there are in 12 grams of carbon, the value provided, 6.022 x 1023 is known as Avogadro's number.

To know more about mole use link below:

https://brainly.com/question/15356425

#SPJ1

Answer:

the product of q in the reaction below is Nacl

Answer:

Option D

Lung

Explanation:

Lung is an Organ not an Organism

-TheUnknownScientist 72

Answer:

lung

Explanation:

the lung is not a life form but an organ. but human, bacteria and mold are all living organisms

Answer:

The answer is sodium bicarbonate

hope it helps

Answer: 2

Explanation:

it’s reflected

Answer:

Transmitted

Explanation:

Because this is when its granted safe passage through the medum

Absorbed: energy goes through and disappears

Reflected: is when light bounces off a surface (mirrors)

Answer:

The new moles of the gas in the flask is 2.13 moles.

Explanation:

Given;

number of moles of gas, n = 1.9 mol

temperature of the gas, T = 21 °C  = 21 + 273 = 294 K

pressure of gas, P = 697 mmHg

volume of gas, V = ?

Apply ideal gas law;

PV = nRT

Where;

R is gas constant, = 62.363 mmHg.L / mol. K

V = nRT / P

V = (1.9 x 62.363 x 294) / 697

V = 49.98 L

New pressure of the gas, P = 795 mmHg

New temperature of the gas, T = 26 °C = 273 + 26 = 299 K

New moles of the gas, n = ?

Volume of the gas is constant because volume of the flask is the same when more gas was added.

n = PV / RT

n = (795 x 49.98) / (62.363 x 299)

n = 2.13 moles

Therefore, the new moles of the gas in the flask is 2.13 moles.