Yes, that is right if yu use it correctly. To use it, just substitute 100 for Ao and 50 for A and solve for t which then will be t1/2 Actually it doesn't matter what number you pick for Ao as long as A is 1/2 that. Another way and slightly shorter is to tkae ln 1/2 (which is 0.693), then
k = 0.693/t1/2
The isotope sodium-22 has a half life of 2.60 years. What is the 1st order rate constant in inverse years?
I am using the Ln (A/A0) = -Kt formula. Is that correct?
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Thank you!!!
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