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?
5689The rate constant for the second order reaction is 0.54/M.s at 300oC. How long (in sec) would it take for the concentration of NO2 to decrease from 0.62M to 0.28 M? 2NO2(g) 2 NO(g) + O2(g)
21364 Identify the substance oxidized, reduced, oxidizing agent and reducing agent for the following reactions
1983. Given that 2Hg2+ (aq) + 2 e- Hg22+(aq) E0 =0.92V Hg22+ (aq) + 2 e- 2Hg(l) E0 =0.85V Calculate standard free energy change and K for the following process at 25oC Hg22+(aq) Hg2+ (aq) + Hg(l)
5980Balance the following redox equations by ion electron method. In basic medium (i) CN- + MnO4- CNO- + MnO2 In Acidic medium (ii) ClO3- + Cl- Cl2 + ClO2
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What is a tripod?
What is the difference between fractionation and distillation?
hi i am siva icompleted m,sc in organic chemistry in 2008&working as alecturer can u send me the interview qusetions with answers . i expected that i got 135 - 140 marks is there any chance to get selection my interview is on may 7th 2010
A ha tc is actual defination of retention time?
Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.
How many moles of sodium hydrogen phosphate can be prepared from 3 mol of sodium hydroxide and phosphoric acid?
Write the chemical formula for epsom salts?
We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?
Why sodium hydroxide used for maintain pH of phosphate buffer
iam usig ph buffers merk. manually how to prepare ?
what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?
in which situation ion pair require to use?
why athanol-water mixtuere have maximum viscocity in wt% 40?
what is the difference between elctrefining and electrolysis?
(CH2)n + nO2. ---->Co2 + nH2O + energy what is this mean with details