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what is allowable limit Of stray light for a spectrophotometer laboratory instruments ?
How the value of Absorbance and molar extinction coefficient are caluculated?
The rate constant for the second order reaction is 0.54/M.s at 300oC. How long (in sec) would it take for the concentration of NO2 to decrease from 0.62M to 0.28 M? 2NO2(g) 2 NO(g) + O2(g)
Sr-90, a radioactive isotope, is a major product of an atomic bomb explosion. It has a half life of 28.1 year. Calculate the first order rate constant for this nuclear decay and the fraction of 90Sr that remains after 10 half lives?
why athanol-water mixtuere have maximum viscocity in wt% 40?
4 Identify the substance oxidized, reduced, oxidizing agent and reducing agent for the following reactions
why silica absorb in mix bed resins in D M plant.
how many types of stability in pharma or API industry ?
As per X-ray Fluorescence theory, when material particle is irradiated with X-ray the electron of innermost orbital of that element atom is exited and emits outside of the atom as photoelecrons, living behind a hole in innermost orbital . This hole is filled by outer orbital electrons. The question is that finely what happens to that photo electon which is emitted outside of the atom?
Normally entropy is expressed as q/T. But, work and heat have same unit. Why can't it be replaced by work?
What is emf and how is it used to arrange Metals in Reactivity Series?
What happens to the solubility of group II Sulphates as you go down the group?
Organic Chemistry 
