Answer:
False, on the celsius scale it is -273.15°
Explanation:
Answer: The carbon-14 left after 10 years is 25 g
Explanation:
Expression for rate law for first order kinetics is given by:
![t=\frac{2.303}{k}\log\frac{a}{a-x}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2.303%7D%7Bk%7D%5Clog%5Cfrac%7Ba%7D%7Ba-x%7D)
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
a) for rate constant
![t_{\frac{1}{2}}=\frac{0.693}{k}](https://tex.z-dn.net/?f=t_%7B%5Cfrac%7B1%7D%7B2%7D%7D%3D%5Cfrac%7B0.693%7D%7Bk%7D)
![k=\frac{0.693}{5years}=0.139years^{-1}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B0.693%7D%7B5years%7D%3D0.139years%5E%7B-1%7D)
b) for amount left after 10 years
![t=\frac{2.303}{k}\log\frac{a}{(a-x)}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2.303%7D%7Bk%7D%5Clog%5Cfrac%7Ba%7D%7B%28a-x%29%7D)
![10=\frac{2.303}{0.139}\log\frac{100}{(a-x)}](https://tex.z-dn.net/?f=10%3D%5Cfrac%7B2.303%7D%7B0.139%7D%5Clog%5Cfrac%7B100%7D%7B%28a-x%29%7D)
![(a-x)=25g](https://tex.z-dn.net/?f=%28a-x%29%3D25g)
Thus carbon-14 left after 10 years is 25 g