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sorry question is misprinted....we have to find bond enthalpy of Cl-Cl

A and C are homomers

as in A , the ch3 is in wedge position and cl is in dash position.

and C is just the same structure with change in conformation.

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Anadiabatic processis one that occurs without transfer of heat or mass of substances between a thermodynamic system and its surroundings.

Plywoodis a material manufactured from thin layers or "plies" of woodveneerthat are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. Allplywoodsbind resin and wood fibre sheets (cellulose cells are long, strong and thin) to form a composite material.

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(1) 2-chloro Butane

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IUPAC NAME: 1-chloro-3-phenyl prop-1-ene

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The averagekinetic energyof a collection of gas particles isdirectly proportionalto absolute temperature only.

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Secondary School

Chemistry

5 points

A solution containing 1.9g per 100 mL of KCl (M=74.5) is isotonic with a solution containing 3 g per 100 mL of urea ( M= 60). Calculate degree of dissociation of KCl solution. Assume that both the solution have same temperature.​

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byAditisharma025513.03.2019

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techtro

Ambitious

Isotonic solutions have same osmotic pressure if osmotic pressure of KCl solution is to calculate the degree of dissociation of KCl solution.

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kobenhavn

Ambitious

Answer: 25%

Explanation: Isotonic solutions are those solutions which have the same osmotic pressure. If osmotic pressures are equal at the same temperature, concentrations must also be equal.

 for non electrolytes such as urea

 for electrolytes such as 

 = osmotic pressure

C= concentration

R= solution constant

T= temperature

i= vant hoff factor

For urea solution: 3 g of urea is dissolved in 100 ml of solution.

For solute A: 1.8 g of A is dissolved in 100 ml of solution.







As 









0.25 0 0

  

Total moles after dissociation =

thus 





Thus degree of dissociation is 25%.

According to M1V1=M2V2hence M1=1.0M V1=100ml V2=1000mlhenceM2=M1V1/V2=1*100/1000=0.1 mole of NaOH option b

DTf= kf*m

dTf= 0.512*(10.50/184)1000/200=0.146’C

dTf=freezing pt. of pure water- Freezing pt. of solution

0.146=0’C-Freezing pt. of solution

Freezing pt. of solution(containing MgBr2)=-0.146’C

One litre of gas consist of 1/22.4 moles.

And if 21% of it is oxygen then it means

Moles of oxygen = (1/22.4)*(21/100) = 0.009375 moles of oxygen

1)Tetravalency of carbon, which makes it capable of making bond with 4 other atoms or radicle ....2)Catenation,by which carbon has the capability to bond with other carbon atoms.In other words it is the self linkage property of carbon to make bond with other carbon atoms.

When it is exposed to air it starts reacting with oxygen and forms metal oxides. With Mg the oxide layer forms a white coating on the outside of the metal thal will slowdown burning. The ribbons should be sanded with the sand paper to remove the layer.

hope this answer helps you

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Weight = moles × moles mass

= 0.2 ×2

= 0.4

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Atomicity tells us the number of atoms present in a molecule of an elementHere X has atomicity 4.So, phosphorus is the required element as it also has atomicity 4.

(1/10) / (1/t) = sqrt(Mx / 32)whereMx = (32/100)*t^2

one equation with 2 unknown...? It's a diophantine equation with several solutions:t.......Mx5.......815.....7220....12825....20030....288

(i) Number of moles in 15 L of N2gas at STP. = (15 L / 22.4 L) = 0.67 moles

(ii)Number of moles in 5 L of N2gas atSTP. = (5 L / 22.4 L) = 0.22 moles

(iii) Number of moles in0.5 g of ​H2gas = (0.5 g / 2 g mol-1) = 0.25 moles

(iv) Number of moles in10 g of O2gas = (10 g / 32gmol-1) = 0.312 moles

Hence, as we know that 1 mole of any gas has Avogadro number of molecules (6.022 x 1023) in it, we can say that the higher number of moles i.e. in 15 L of N2gas will contain maximum number of molecules, as it has higher number of molar quantity.

1 mole of H2 has volume → 22.4 L so, in 15L → moles = 15/22.4 = 0.67 mol

similarly for 5L , mole → 5/22.4 = 0.22 mol

0.5g H2 has mole = 0.5/2 = 0.25 mol and 10g Of O2 has mol = 10/32 = 0.33

so, option A

When temperature is constant , gas law states that

P1*V1 = P2*V2 => 10*1 = 2*V2 so, V2 = 10/2 = 5L.

Thank you so much

The equation of state is given by, pV = nRT ……….. (i)

Where, p → Pressure of gas

V → Volume of gas

n→ Number of moles of gas

R → Gas constant

T → Temperature of gas

From equation (i) we have,

p = n RT/V

Where n= Mass of gas(m)/ Molar mass of gas(M)

Putting value of n in the equation, we have

p = m RT/ MV ------------(ii)

Now density(ρ) = m /V ----------------(iii)

Putting (iii) in (ii) we get

P = ρ RT / M

OR

ρ = PM / RT

Hence, at a given temperature, the density (ρ) of gas is proportional to its pressure (P)

At the center of a current carrying coil, the magnetic field intensity is directly proportional to the current and inversely proportional to the radius of the coil.So, if the current is doubled and radius is halved, then the value of B increases by 4 times the initial value.

Sodium Hydroxide and potassium hydroxide are hygroscopic and readily absorbs carbon dioxide from the air and forms Sodium Carbonate and potassiym carbonate respectively, that's why, they should not be left exposed in the air

Least precise term i.e. 0.112 is having 3 significant digits.

∴ There will be 3 significant figures in the calculation.

thanks

least number after decimal is two hence there will be two significant figure in the calculation

Thefree energychange of the reaction in any state, ΔG (when equilibrium has not been attained) is related to the standardfree energychange of the reaction, ΔG0(which is equal to thedifferenceinfree energiesof formation of the products and reactants both in their standard states) according to the equation.

use value of R as 8.3145temp: 273+25 = 298Kand the value of free gibb's energy given

and using the equation given above, solve the question.

primary alcoholप्राइमरी अल्कोहल

your wrong answer

Assuming 100 g of sea water,it contains 3.5 g of Nacl.No of moles of Nacl=3.5/58.4=0.06 molesso for 100 gm of sea water,no of moles is 0.06so molality=0.06/100=0.0006let me know if this right and it is not,I'll revise it for you.

This is becausesalt wateris agood conductor of electricity.Saltmolecules are made of sodium ions and chlorine ions. (An ion is an atom that has anelectricalcharge because it has either gained or lost an electron.). These ions are what carryelectricity throughwater.

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It is easier to swim in sea water than in a river because, the sea water contains salt which increases the density of water and also increases its upthrust so, the body sinks less in it and we swim easily