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Physical Chemistry
What is a purity and why is it important?
Physical Chemistry
An object has a mass of 3.15oz and a volume of 0.1173L. What is the density (g/mL) of the object?
Physical Chemistry
Molybdenum at 20 Celcius is BCC and has an atomic radius of 0.143 mm. calculate a value for its lattice constant a in nanometer.
Physical Chemistry
sodium bicarbonate can remove smell in clothes and other things, besides sodium bicarbonate, what are the other alternative which are cheaper? is sodium carbonate an alternative?
Physical Chemistry
sodium sulfate is a filler in detergent powder, how can you make it more useful rather than just filler? What can you add or making it into something useful and gives more contribution in detergent powder
Physical Chemistry
What is the volume of 75.0g of ethanol?
Physical Chemistry
how spectrum formed
Physical Chemistry
for nitrogen molecule,calculate the following
1)Translation energy per molecule at 300 K
2)Translation energy per mole at 300 K
3)Number density at 298.2K
4)Concentration at 298.2K
1)Translation energy per molecule at 300 K
2)Translation energy per mole at 300 K
3)Number density at 298.2K
4)Concentration at 298.2K
Physical Chemistry
Integral enthalpy of a solution of KCl when 1 mole of it is dissolved in 20 mole water is +15.90kJ. when 1 mole of it is dissolved in 200 mole water, the change in enthalpy is 15.58kJ. Calculate the enthalpy of hydration.
Physical Chemistry
The radius fo an atom of Kr si about 1.9 A (w/the tiny circle on top of 'A').
(a) How many Kr atoms would have to be lined up to span 1.0mm?
(b) If the atom is assumed to be a sphere, what's the volume in cm^3 of a single Kr atom?
(a) How many Kr atoms would have to be lined up to span 1.0mm?
(b) If the atom is assumed to be a sphere, what's the volume in cm^3 of a single Kr atom?
