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?

6202

what does 50 denote in dowex 50 ????

2539

4 Identify the substance oxidized, reduced, oxidizing agent and reducing agent for the following reactions

2448

what is the difference between elctrefining and electrolysis?

2209

what is allowable limit Of stray light for a spectrophotometer laboratory instruments ?

1474

The use of vermilion on rubric of the Tartar Relation is confirmed by the presence of three lines attributed to HgS. Why should this diatomic have more than one vibrational line?

2630

WHAT IS THE SYLLABUS OO GROUP -I?

2271

Why does the experimental lattice enthalpy of NaI differ greatly from the theoretical lattice enthalpy?

3386

During Soundness testing of Cement by Lechatelier method the Cement mould expands about 20 mm when merged in curing water for 24 hours after mould preparation.In that Cement MgO content is about 3.0%,SO3 is about 2.6% & Blaine is about 360 M2/Kg.Guess the reason & suggest solution.

3038

How can be set a responds factor for evaluating a unknown impurity by HPLC

2361

what kind of question can be asked in interview for UV- VISIBLE & give me answer ?

3819

a sample of gas occupies a volume of {450.0 ml}at {740 mm Hg}and[16C]determine the volume of this same sample at [760 mm Hg]and [37c]?

4972

Write the each half cell reaction and also net cell reaction for a cell

2880

Find out how to make artifacts the maxwell boltzmann theory of gases . ps. I don't speak English that well

1514

What can be the supporter of combustion except oxygen.

2778