Sunday
April 20, 2014

Homework Help: chemistry

Posted by Trixie on Friday, April 16, 2010 at 5:04pm.

A radioactive sample contains 3.25 1018 atoms of a nuclide that decays at a rate of 3.4 1013 disintegrations per 26 min.
(a) What percentage of the nuclide will have decayed after 159 d?
%

(b) How many atoms of the nuclide will remain in the sample?
atoms

(c) What is the half-life of the nuclide?
days

I have a general idea of how to solve this but keep getting the incorrect answer...I've tried a few different ways so I'm not sure where I'm going wrong. My initial attempt was to convert days into minutes for my calculations. I used the equation N'=Ne^-kt where I calculated k to be the rate given (over minutes). I don't need the answers per se...I think once I know how to correctly approach this I should be fine in figuring them out...Thanks

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Q1. The blood volume in a cancer patient was measured by injecting 5...
Chemistry - A radioactive sample contains 3.25 1018 atoms of a nuclide that ...
Chemistry - A 71 mg sample of a radioactive nuclide is administered to a patient...
chemistry - a certain radioactive nuclide has a half life of 5.00 hour. Calcuate...
Chem - If a sample of the radioactive nuclide 139Cs has an activity of 0.0730 Ci...
college - if a sample of the radioactive nuclide 139cs has an activity of 0.0730...
chem - Nuclide X has decay constant 1.08 h-1. It can decay in 2 branches, to ...
Chemistry - A 50.6 mg sample of sodium perchlorate contains radioactive chlorine...
Chemistry - It took 109.8 years for a 300.0 mg sample of an unknown radioactive ...
Chemistry - The nuclide 38cl decays by beta emission with a half life of 40min...

Search
Members