Answer: for
at 25°C is
Explanation: We are given of
at 25°C which is
To calculate the of
, we use the formula:
Putting values in above equation, we get:
At which point is the compound a solid? 1- F 2- G 3- H 4- I
1 answer:
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Radioactive elements obey 1st order kinetics,
For 1st order reaction, relation between rate constant (k) and half life [t(1/2)] is,
k =
Also, for 1st order reaction, we have
t =
Given that: <span>the bones from a mastodon had lost 78.5% of their C14,
</span>∴ initial conc. of C14 = 100%, conc. of C14 left after time 't' = 21.5%
∴t =
= 1.2758 X 10^4 hours
For 1st order reaction, relation between rate constant (k) and half life [t(1/2)] is,
k =
Also, for 1st order reaction, we have
t =
Given that: <span>the bones from a mastodon had lost 78.5% of their C14,
</span>∴ initial conc. of C14 = 100%, conc. of C14 left after time 't' = 21.5%
∴t =