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Physical Chemistry
Sample of camphor and the solution froze at 174.9°c. If the pure sample froze at 177°c and the cryoscopic constant is 0.83per°c. Calculate the molarity of compound X
Physical Chemistry
.a reaction undergoing first order kinetic energy of activation of 140kj/mol and a frequency factor A of 2.05 ×10^3 s^-1. If the half life of the reaction is 100 seconds, what will be the corresponding temperature of the process?
Physical Chemistry
If 100cm^3 of an aqueous solution of panadol containing 60mg is shaken with 10cm^3 of diethylether, at 293k, what weight of panadol will remain undissolved in the aqueous layer when equilibrium is reached. Given the distribution coefficient of panadol in diethyl ether relative to when is 50.
Physical Chemistry
Chlorine gas is to be used to fill a gas cylinder of capacity 179.2dm^3 from an electrolytic cell containing brine solution, if the cell is supplied with a current of 20A, for how long must the cell be operated to fill the cylinder to its full capacity at stp.
2) A container with volume 71.9cm^3 contains water vapor at a pressure of 10.4atm and a temperature of 465°c. How many grams of the gas are in the container
2) A container with volume 71.9cm^3 contains water vapor at a pressure of 10.4atm and a temperature of 465°c. How many grams of the gas are in the container
Physical Chemistry
20 ml of carbon monoxide and dihydrogen were mixed with excess of dioxygen and exploded and cooled .there was a volume contraction of 18 . all measured at stp. the volume v1 and v2 of carbon monoxide and dihydrogen in original mixture
Physical Chemistry
Question 17 : A sample of a salt and water solution is homogeneous throughout. Is this sample a mixture or a pure substance?
a) a mixture, because it can have a variable composition
b) a pure substance, since it is the same throughout
c) a pure substance, because it has a definite composition
d) a mixture, because it has a fixed, definite composition
Question 20 : In order to dissolve the greatest amount of sugar in a cup of water, you should
a) use sugar crushed into small pieces, and heat the water
b) use sugar in large pieces, and cool the water
c) use sugar in large pieces, and heat the water
d) use sugar crushed into small pieces, and cool the water
a) a mixture, because it can have a variable composition
b) a pure substance, since it is the same throughout
c) a pure substance, because it has a definite composition
d) a mixture, because it has a fixed, definite composition
Question 20 : In order to dissolve the greatest amount of sugar in a cup of water, you should
a) use sugar crushed into small pieces, and heat the water
b) use sugar in large pieces, and cool the water
c) use sugar in large pieces, and heat the water
d) use sugar crushed into small pieces, and cool the water
Physical Chemistry
How many k.g of wet NaOH containg 10percent are required to prepare 60 litres of 0.5M solution
Physical Chemistry
How is Nernst distribution law applied in analytical polarogram?
Physical Chemistry
What is the electronic configuration for B3+?
Physical Chemistry
Which is more resistant gel to heat? Plasty base or silicon dioxide (Aerosil)
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#339914 on Dec 2023
#339914 on Dec 2023