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?

0 Answers   Wipro,

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

0 Answers   Orchid,

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

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why the atomic weights are in fractions?

1 Answers  

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is the temparature effects the solubility of the compound?

2 Answers  

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At a constant temp. volume is inversly proportional to pressure. This is Boyle's law. But, when u give pressure to a football, how the volume also increases?

1 Answers  

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What happens to the solubility of group II Sulphates as you go down the group?

3 Answers  

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What is Downward Displacement of Water?

11 Answers   BARC, RyanAir,

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

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How the value of Absorbance and molar extinction coefficient are caluculated?

2 Answers   Panacea,

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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?

1 Answers   Grasim,

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if water is mixed with mercury what causes with thier suspension property is it increses,decrease or average?

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