I’m assuming this means mass percent, because that is typical of these types of problems. The substance with the highest mass percent of Br would be the one where the molar mass of Br over the molar mass mass of the substance has the highest value. This would require the other component of the substance to have as small of a molar mass as possible, and by inspection of the periodic table, it is evident that this would be lithium, which has a molar mass of 6.941 amu rather than potassium’s 39.10 or cesium’s 132.91. This means that the correct answer should be C. LiBr.
(a) 0.807 fraction of the sample will remain 3. 80 yr after its preparation of tritium.
<h3>What is half life?</h3>
Half life is the time taken for the radioactivity of a substance to fall to half its original value whereas mean life is average lifetime of all the nuclei of a particular unstable atomic species.
So if a radioactive element has a half life of one hour, this means that half of it will decay in one hour. After another hour, half of the remaining material will decay.
Example:
The radioactive isotope cobalt-60, which is used for radiotherapy, has, for example, a half-life of 5.26 years.
Tritium half life = 12.32 (T half)
Formula :
- N/N₀ = (1/2) ^ t/T (N/N₀ = Fraction ratio)
(a) 0.807 fraction of the sample will remain 3. 80 yr after its preparation of tritium.
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Answer:
Empirical Formula
Explanation: got it off google BUD