At 400K, Kc = 7.0. If 0.30 mol of Br2 and 0.30 mol Cl2 are introduced into a 1.0 L at 400 K, what will the equilibrium concentrations be for Br2, Cl2, and BrCl?

The solution is diluted, and its specific heat and its density to be the same as for pure water:
(a) The change in temperature recorded in this experiment is AT = -1.5°C.

(b) The heat transferred between the system and the surroundings can be calculated using the formula Q = mcAT, where m is the mass of the solution, c is its specific heat capacity, and AT is the change in temperature.

Assuming that the solution has a mass of 100 g and a specific heat capacity of 4.18 J/g-°C, then the heat transferred is 100 x 4.18 x (-1.5) = -627 J.

(c) The molar heat of the neutralization reaction can be calculated using the formula q = -Q/n, where q is the molar heat, Q is the heat transferred, and n is the number of moles of the reaction.

Since 1 mole of HCl and 1 mole of NaOH are used in the reaction, n = 1. Thus, the molar heat of the neutralization reaction is -627/1 = -627 kJ/mol.

(d) The neutralization reaction is exothermic, as it releases energy in the form of heat.

This is due to the fact that the reaction between NaOH and HCl is highly energetically favorable, with the products having a lower energy than the reactants.

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Answer:

that's a little bit difficult question

Explanation:

sorry !

Explanation:

well, I dunno if I'm correct but I think it's a physical change cause no new substance is formed

The first drop of distillate would contain 50% cyclohexane and 50% toluene if we performed a straightforward distillation on a combination of 20% cyclohexane and 80% toluene.

The method of distillation, which depends on the variations in the distinct components' boiling points, is used to separate constituents from a liquid combination. Both vapour and liquid compositions are important for distillation. So, we combine the diagrams for the liquid and vapour components into one. The most common method for measuring boiling points is to conduct a distillation and record the boiling point (or boiling range) on a thermometer. When there is sufficient of the substance to do a distillation, this procedure is employed.

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Answer:

2Ca + O₂ → 2CaO

Explanation:

Cuando el Calcio (Ca) reacciona con oxígeno (O₂) se produce cal (CaO). La cal es un sólido inodoro de color blanco a grisáceo. La cal es un óxido que se encuentra presente en el cemento y su cuantificación permite determinar la calidad y el tipo de cemento a utilizar.

La reacción que describe el proceso anterior es:

Ca + O₂ → CaO

Para balancear los oxígenos, se deben poner 2 CaO como producto:

Ca + O₂ → 2CaO

Para balancear los calcios, se pone como coeficiente del Ca un 2:

Esta última es la reacción que describe el proceso anterior

In ionic bonds, alkaline earth metals will lose two electrons to achieve a stable octet configuration.

Alkaline earth metals belong to Group 2 of the periodic table and have two valence electrons. They tend to lose these two electrons to achieve a stable electron configuration, forming ions with a +2 charge.

This is because alkaline earth metals have two valence electrons in their outermost shell, and losing these electrons will result in a full shell and a more stable configuration.

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Answer:

Micah

Explanation:

that should be the answer

Speed in excess of 100 km/h, which is 208.8 km / h

Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration  

• An equation of uniformly accelerated motion  

\(\large {\boxed {\bold {x=xo+vo.t+\frac {1} {2} at ^ 2}}}\)

vt = vo + at  

vt² = vo² + 2a (x-xo)  

x = distance on t  

vo / vi = initial speed  

vt / vf = speed on t / final speed  

a = acceleration  

I think it's not chemistry but physics

Δx = 290 m

vf = 0⇒stop

Δt = 10 s

We use the formula in the question

\(\tt \Delta x=\dfrac{1}{2}(vf+vi)\Delta t\\\\290=\dfrac{1}{2}(0+vi).10\\\\vi=58~m/s=\boxed{\bold{208.8~km/h}}\)

Answer:

0.11M

Explanation:

What is the Molarity of a Ca(OH)2 solution if 30.0mL of

the solution is neutralized by 26.4mL of 0.25M HCI solution?

1L (1000 ml) of the HCl contains 0.25 moles of H ion

26.4 ml contains ( 26.4 X0.25/1000) moles of H ion ion

=0.0066 moles H ion

2HCl +Ca (OH)2-----> 2H2O +CaCl2

SO 2 H IONS NEUTRALIZE 1 Ca(OH)2 MOLECULE

00066 moles H ion neutralize 0.0033 moles Ca(OH)2

the 0.0033 moles are distributed over 30 ml, so the concentration of the

Ca(OH)2 IS 0,0033/(30/1000) =0.11 moles/liter or 0.11M

C. physical change

Explanation:

That's the answer

The complete reaction equation, using the lowest number of coefficients possible is;  HF(aq)  +  OH^-(aq)  ----> F^-(aq) + H2O(l)

The reaction equation here shows the reaction between hydrogen fluoride and the the hydroxide ion from a base. This is a neutralization reaction as shown.

The reaction can fully be represented as;

HF(aq)  +  OH^-(aq)  ----> F^-(aq) + H2O(l)

This is the full reaction equation using the lowest number of coefficients possible in the reaction equation.

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Answer:

The pH of a 0.10 Maqueous Ba(OH)2 solution at 25°C is 13.30

Explanation:

The balanced equation is Ba(OH)2(s)→Ba2++2OH−

This indicates that the concentration is 0.2 M

We will find H+ ion concentration

As we know that

[H+][OH−]=1.0×10−14M

Given -  

[OH−]=2.0×10−1M

Putting value of [OH-] in above equation we get -  

[H+]=5.0×10−14M

pH=−log10[H+]

pH=−log10[5.0×10−14] = 13.30.

Answer:

Heat, Salt

Explanation:

Raising the temperature of ice brings it from a solid state to a liquid.  Unless you have a list of substances then it would probably be salt.  Salt melts Ice by lowering the freezing point temperature.

If you have a list of substances it would be helpful to list them in your question.

The disintegrations occur per second is 76.2 decay/ sec.

what is disintegrations ?

A compound can be broken down into two or more simpler molecules or atoms by a process called chemical disintegration. Reversible or irreversible, endothermic or exothermic are the two terms used to describe all chemical disintegration reactions.

What is half-life ?

The half-life is the amount of time it takes for a radioactive isotope to decay by half. The half-life of a specific radioactive isotope is constant; it is unaffected by outside influences and has no connection to the isotope's initial concentration.

Mass of sample = 305g

ratio of C₆¹⁴ in the sample N =13/ 1d²

Half life  C₆¹⁴ T1/2 = 530*36s*10^7sec

atomic mass of pure carbon C₆¹⁴ M=12g

avagadro number Nₐ=6.03*10^23

hence the number of radioactive nuclei of  C₆¹⁴

n=m/M*Nₐ*n

305/ 12* 6.023* 10²³* 13/10¹²

= 1.99*10¹³nuclei

decays/secs ΔN/Δt= nt

ΔN/Δt= n* 0.693/T1/2

ΔN/Δt= nX 0.693/T1/2

ΔN/Δt= (1.99*10²³)  (0.693/5730*3.16*10⁷)

Δn/Δt= 76.2 decay/ sec

Therefore, disintegrations occur per second is 76.2 decay/ sec.

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Answer:

Explanation:

i got D

The mole ratio of methane to water in a reaction depends on the balanced chemical equation representing the reaction. Without specific information about the reaction, it is not possible to determine the exact mole ratio.

In a balanced chemical equation, the coefficients in front of the reactants and products represent the mole ratios between them. For example, if the balanced equation is:

CH4 + 2O2 -> CO2 + 2H2O

The mole ratio of methane to water is 1:2. This means that for every 1 mole of methane consumed in the reaction, 2 moles of water are produced. The coefficients provide a quantitative relationship between the reactants and products, allowing us to determine the stoichiometry of the reaction and the corresponding mole ratios.

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Atoms of the same element may have different mass numbers.

When water particles in their gaseous state lose enough energy, the gaseous state of water converts to the liquid state as the kinetic energy of particles decreases.

In the gaseous state, water molecules have higher kinetic energy compared to the liquid state. When water particles lose energy, typically through cooling or condensation, their kinetic energy decreases. As a result, the water molecules slow down and come closer together, forming intermolecular forces that enable them to condense into the liquid state.

This phase transition occurs when the average kinetic energy of the water particles decreases below a certain threshold, allowing them to transition from the highly mobile and energetic gaseous state to the more ordered and cohesive liquid state.

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Answer:

0.20 moles

Explanation:

In order to solve this problem it is necessary to keep in mind the definition of molarity:

If we input the data given by the problem we're left with:

Meaning that we can proceed to calculate the number of moles:

The number of moles of glucose (\(C_6H_{12}O_6\)) in 0.500 Liters of a 0.40 M solution is 0.2 moles.

Given the following data:

To determine the number of moles of glucose (\(C_6H_{12}O_6\)) in 0.500 Liters of a 0.40 M solution:

Mathematically, the molarity of a solution is given by the formula:

\(Molarity = \frac{number\;of\;moles}{Volume \;in\;liters}\)

Making number of moles the subject of formula, we have:

\(Number\;of\;moles = Molarity \times Volume\)

Substituting the given parameters into the formula, we have;

\(Number\;of\;moles = 0.40 \times 0.500\)

Number of moles = 0.2 moles.

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so, to calculate the molar of the monoprotic weak acid ;

first, we write the reactions

HA +NaOH → NaH +H20

42.0ml NaOH ( 1l NaOH / 1000 ml NaoH ) (0.250 m/ 1l NaOH) (1 mol HA/ 1 mol NaOH)

0.0105 moles HA

now, we calculate the molar mass

molar mass= mass/ moles

                   = 0.483 grams/ 0.0105 moles

                   = 46 grams/moles

the molar mass of the monoprotic weak acid is 46grams/moles

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When 15 L of a gas is heated from 10°C to 50°C The final volume of the gas is 17.16 L.

We have 15 L of gas which is initially at 10°C, heated to 50°C at constant pressure.

In this problem, we have to use Charles’ law:

\(V_1/T_1 = V_2/T_2\)

This formula is used when pressure remains constant.

To apply this formula, we have to convert the temperature to the absolute temperature scale by adding 273 K to the initial and final temperatures.

Here,

\(V_1\) = 15 L (Initial Volume)

\(V_2\) = ? (Final Volume)

\(T_1\)= 10°C + 273 K = 283 K (Initial Temperature)

\(T_2\) = 50°C + 273 K = 323 K (Final Temperature)

Using Charles’ law,

\(V_1/T_1 = V_2/T_2\)

=> 15/283 = \(V_2\)/323

=> \(V_2\) = 15×323/283 = 17.16 L (Final Volume)

Hence, the final volume of the gas is 17.16 L.

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Answer:

it is because of the bacteria and different things that go into waters such as ponds, rivers, lakes, seas, oceans, streams, and other body of waters and I should also add the chemicals that go into them as well

Explanation:

The set of results applies to a reaction that is not spontaneous at 273 K but is spontaneous at 400 K is ∆H > 0 and ∆S > 0. Therefore, the correct option is B.

This set of results applies to a reaction that is not spontaneous at 273 K but is spontaneous at 400 K. The positive ∆H indicates that the reaction is endothermic, meaning it requires heat to proceed, while the positive ∆S indicates an increase in disorder or entropy. At higher temperatures, the favorable entropy change can overcome the unfavorable enthalpy change, making the reaction spontaneous.

Hence, the correct answer is option B.

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Answer: we would die

Explanation:

the pressure being so large would squash us flat.

Answer:A

Explanation:

molar solubility of PbBr2 in 0. 500 M KBr solution is 4S3 = 6.60 x 10–6 . PbBr2 ionizes as Pb2+ + 2Br-, molar solubility of PbBr2 in a 0. 500 M Pb(NO3)2 solution is 0.0181 moles/lit..

If molar solubility of PbBr2 is “S”, then solubility of Pb2+ is also “S” but that of Br- would be “2S”. Ksp = [Pb2+] [Br-]2 = (S) (2S)2 = 4S3 = 6.60 x 10–6 4S3 = 6.6 x 10–6,this gives Solubility S = 1.181 x 10–2 = 0.0181 moles/lit. solid's solubility (usually referred to as its molar solubility) is expressed as the concentration of the "dissolved solid" in a saturated solution. This would simply be the concentration of Ag+ or Cl- in the saturated solution for a simple 1:1 solid like AgCl. The other way to express solubility is through molar solubility, which is defined below. It is the number of moles of solute in one litre of saturated solution and is abbreviated with a lower case's'. It is expressed in moles per litre, also known as molarity.

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Answer:

pH>7

sour taste

donate H+ ions

turn litmus paper from blue to red

Explanation:

Answer:

Explanation:

   pH < 7.

   Sour taste (though you should never use this characteristic to identify an acid in the lab)

   Reacts with a metal to form hydrogen gas.

   Increases the H+ concentration in water.

   Donates H+ ions.

   Turns blue litmus indicator red.

Answer:

Ga-135 is the largest atomic radius because B atomic radius is 85

Answer:

The proportionality constant ( Henry’s constant) = 2.32 * 10^-5 M/kPa

Explanation:

Here in this question, we are concerned with calculating the proportionality constant for this gas.

Mathematically, we can get this from Henry law

From Henry law;

Concentration = Henry constant * partial pressure

Thus Henry constant = concentration/partial pressure

Henry constant = 0.00290 M/125 kPa = 2.32 * 10^-5 M/kPa