The half-life of a first order reaction is determined to be 85.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
13 answers
the correct answer is 536 years (green check!!)
had a red x !!! the answer is not 536!
i have the green check!
you have to write only 536 in the box!
you have to write only 536 in the box!
Did it with 536 and still red X. must be a system error.
Actually its 443
Another red X for 443
The years value is diferent, I got the green on 536
That could be the reason. Use the method used in H6P5.
I am in agreement, because there are other questions whereby the years is 90.2, anyway could anyone give a step by step method in answering the above question?
The values are different for every person - its an anti-cheat system.
Got it 482.55003
85.5 years X (multiply) with 5.64386
85.5 years X (multiply) with 5.64386
Thank you all.
yes Paul is right...!!nice shortcut..!!
4 answers