Posted by **jade** on Saturday, January 29, 2011 at 7:21pm.

Popcorn kernals pop independently (i.e. unimolecularly). For one brand at constant temperature, 11 kernals pop in 10 seconds when 240 kernals are present. After 145 kernals have popped, how many kernals will pop in 10 seconds?(Your answer may include fractions of a kernal)

I understand that rate constants and rates are involved with the problem, but I'm not sure how to approach it..

- college Chemistry -
**DrBob222**, Saturday, January 29, 2011 at 8:53pm
I believe you want to use

ln(No/N) = kt.

Substitute No = 240

N = 240-11 = ??

t = 10 seconds.

Solve for k.

Then use k in

ln(No/N) = kt

No = 240-145 = ??

N = unknown

you know k and t. Solve for N, which will be number of kernals remaining; therefore, No-N must be the amount popped. Check my thinking.

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