goodperson6135 goodperson6135
  • 01-07-2018
  • Chemistry
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A reactant or is being consumed in a first-order reaction. what fraction of the initial r is consumed in 4.0 half-lives

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PBCHEM
PBCHEM PBCHEM
  • 10-07-2018
Answer : If a reactant undergoes first order kinetics and the initial reactant was R is consumed in 4 half lives then,

the first half life would undergo from 1 to 1/2R; 

the second half life will go from 1/2R to 1/4R;

in third half life it will undergo from 1/4R to 1/8R;

And finally in fourth half life it will go from 1/8R to 1/16R.

So, it means [tex]15/16^{th} [/tex] is utilized and only 1/16 R remains
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