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?

5705

Why we use potassium dichromate in control of absorbance in uv region and copper sulphate in control of absorbance in visible region?

2444

Identify problem faced when mass spectroscopy is used with HPLC system ?

1367

why digestion require in icpms?

289

there is something which we call as the basicity of an acid i wanted to ask is that is there something like the basicity of an alkali if yes than how can we define it?

1585

what is mean by dissolution hydrodynamics?

333

If we have 5 strength which is not dose proportinate and excipients also diffrent in each strength then how we can proceed for Force degradation? and excipient are same but not dose propotinate the how FD?

316

What modification is required for the atomic theory in order to explain the existence of isotopes, and modern view of atomic nuclei and electrons?

1812

What is edta?

604

Explain what is meant by "c2 symmetry" and "mirror plane symmetry". Can a molecule with "mirror plane symmetry" ever be chiral? : Polymer Chemistry

574

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

5278

give clarity of linearity and range in method validation

1846

What is protein - according to chemistry?

674

In the calculation of calorific value of any fuel why the latent heat of vap. of water is taken as 587 kj/mol whereas actually it is 540kj/mol?

1799

Why we use DPPH in ESR and DPH in fluorescence spectroscopy?

2064