D) The movement of electrons between atoms
that's the answer I think
Answer:
Explanation:
Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance.
Answer:
![t=46.13days](https://tex.z-dn.net/?f=t%3D46.13days)
Explanation:
Hello there!
In this case, since the radioactive decay is considered as first-order kinetic model, whereby the remaining mass of the radioactive material involves the initial one, the rate constant and elapsed time:
![A=Ao*exp(-kt)](https://tex.z-dn.net/?f=A%3DAo%2Aexp%28-kt%29)
As we were not initially given the rate constant, we can use the half-life to calculate it as follows:
![k=\frac{ln(2)}{8.040days}=0.08621days^{-1}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7Bln%282%29%7D%7B8.040days%7D%3D0.08621days%5E%7B-1%7D)
Thus, we can calculated the elapsed time for the given conditions to obtain:
![t=\frac{ln(0.75g/40.0g)}{-0.08621days^{-1} }\\\\t=46.13days](https://tex.z-dn.net/?f=t%3D%5Cfrac%7Bln%280.75g%2F40.0g%29%7D%7B-0.08621days%5E%7B-1%7D%20%7D%5C%5C%5C%5Ct%3D46.13days)
Regards!
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Learn more about rapid identification here brainly.com/question/14032010
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