A reactant R is being consumed in a first order reaction. what fraction of the initial R is consumed in 4.0 half lives? What is the equation to follow, or how do you get that answer?
2007-10-09 07:17:53 · 3 answers · asked by anners 1 in Science & Mathematics ➔ Chemistry
It goes back to the definition of a half-life. It is the time required to consume half. The first half life R goes from 1 to 1/2 R. In the second half life it goes from 1/2 to 1/4, in the third it goes from 1/4 to 1/8 and in the 4th it goes from 1/8 to 1/16.
So, 15/16th of the original amount is gone and 1/16th remains.
Good luck!
2007-10-09 08:43:39 · answer #1 · answered by Rush is a band 7 · 1⤊ 0⤋
Roughly 94% is consumed in the first 4 halflifes. The equation is 1 x .5^4 = .063, so with 6% remaining, 94% has been eliminated.
2007-10-09 14:23:24 · answer #2 · answered by shaneallen04 3 · 1⤊ 0⤋
!/16
2007-10-09 14:22:28 · answer #3 · answered by Apparao V 4 · 0⤊ 0⤋