Why we use potassium dichromate in control of absorbance in uv
region and copper sulphate in control of absorbance in visible
region?
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What is the purpose of adding urea?
i pass my B.Sc. in 1999(chemistry. i dont understand what study after bsc. i am an average student.After my Bsc i joint my brother factory and i work there as a production, QC and electrical testing for Oil. i try to another job but my exprince not match my education co u tale me what i do.
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