You can cross multiply and then get k alone so it would look like this:
76 81
----- = ------ = 76k= 24624
304 k ----- ----------- = k = 324
76 76
so k is equal to 324
hope this helps have a nice day
C. Yes, if each sample contains 6.02 x 10²³ atoms.
Answer:

Explanation:
Hello!
In this case, since the radioactive decay equation is:

Whereas A stands for the remaining amount of this sample and A0 the initial one. In such a way, since the sample of rutherfordium is reduced to one-third of its nuclei, the following relationship is used:

And we plug it in to get:

Now, as we know its half-life, we can compute the elapsed time for such loss:


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Answer:
<h3>Energy is transferred from the hotter object to the cooler one, and the difference in temperature between them decreases.</h3>
Explanation