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In the first order reaction A. products [A]= 0.826M initially and 0.634 M after 15.0 min. What will [A] be after 2.7 h? ( t1/2= 39.3 min)



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aaronq
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find the decay constant, k:
\[t _{1/2}=\frac{ \ln2 }{ k }\]
then use the exponential decay formula:
\[A=A _{0}e ^{kt}\]

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somehow this answer didn't work for me

aaronq
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did you convert 2.7 hours to minutes?

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162 min, right?

aaronq
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i got 0.0474 ...0.05 M

S
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Worked ! probably i did something wrong in calculations. Did you use the same formula ?

aaronq
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yep, i did

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Thank you!

aaronq
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no prob!