Answer:
friend me on here and imma send you the link Explanation:
Molarmass of beryllium is 9.0
molar mass of silicon is 28.4
molar mass of calcium is 40.1
molar mass of rhodium is 103.
-two significant figures
-four significant figures
-One significant figure
-four significant figures
-two significant figures
-three significant figures
-three significant figures
Need more to the question
Answer:
20619.4793 years
Explanation:
The half life of carbon-14 = 5730 years
The formula for the half life for a first order kinetic reaction is:
Where,
is the half life
k is the rate constant.
Thus rate constant is:
5730 years=ln(2)/k
k = 1.21×10⁻⁴ years ⁻¹
Using integrated rate law as:
![ln\ \frac {A_t}{A_0}=-k\times t](https://tex.z-dn.net/?f=ln%5C%20%5Cfrac%20%7BA_t%7D%7BA_0%7D%3D-k%5Ctimes%20t)
Where,
is the concentration at time t
is the initial concentration
Given that the final concentration contains 8.25 % of the original quantity which means that:
![\frac {A_t}{A_0}=0.0825](https://tex.z-dn.net/?f=%5Cfrac%20%7BA_t%7D%7BA_0%7D%3D0.0825)
So,
ln(.0825)= -1.21×10⁻⁴×t
<u>
t = 20619.4793 years</u>
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