what are stereomers? how are they classified?

3408

Can you provide a brief overview of the properties and characteristics of the chemical element Actinium?

526

Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

2609

AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

2053

Why titration in which hcl and h2so4 is use?

1071

which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

2161

Why be is not soluble in liquid ammonia?

1112

What are some common isotopes of Actinium, and how do they differ in terms of stability and uses?

682

In testing of Cement the formula for water requirement for setting time is as below- Water required for setting time = NC x 0.85 The question is that what is the logic of 0.85 in this formula??

2427

chlorination of methane is possible and a mixture of products are obtained. Is flourination and Bromination of methane is possible?

2027

Why is eriochrome black t indicator cannot be used in this experiment?

1171

why multimedia dissolution require to do?

830

My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

1596

Why six unit used for precision?

1351

what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

2293