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Chemistry

1 answer:

jekas [21]3 years ago

4 0

Answer:

Abiotic is non living thing, while biotic is a living thing

hope this info helps

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PLZ HELP HALF M GRADE!!<br> how does an arrangement of atoms in a mineral relate to its proprieties?

marissa [1.9K]

“The internal orderly arrangement of atoms in mineral is largely a function of the relative size of the adjacent atoms. Along with the chemical composition of the minerals and the nature of bonding between atoms within the minerals determines their properties.”

Hope this helps

8 0

4 years ago

More accurate dates of the reigns of ancient Egyptian pharaohs have been determined recently using plants

ArbitrLikvidat [17]

King Tut's reign came to an end at 3350 years ago

<h3>Further explanation</h3>

Carbon-14 is a radioactive isotope that can decay. This isotope can be used to determine how long ago an organism died by knowing the ratio from 12C to 14C

Can be formulated

$\tt Nt=No\dfrac{1}{2}^{t/t1/2}$

Or we can use :

$t=-\frac{1}{\lambda }\text{ln}\left(\frac{{N}_{t}}{{N}_{0}}\right)\longrightarrow t=-\frac{1}{\lambda }\text{ln}\left(\frac{{\text{Rate}}_{t}}{{\text{Rate}}_{0}}\right)$

The half-life of C-14, 5730 years, so the decay constant :

$\tt \lambda =\dfrac{\text{ln 2}}{{t}_{1\text{/}2}}=\dfrac{0.693}{\text{5730 y}}=1.21\times {10}^{-4}}$

Assume the initial C-14 activity was 13.6 disintegrations/min/g of C

$\tt t=-\dfrac{1}{\lambda }\text{ln}\left(\dfrac{{\text{Rate}}_{t}}{{\text{Rate}}_{0}}\right)=-\dfrac{1}{1.21\times {10}^{-4}}\text{ln}\left(\dfrac{9.07}{13.6}\right)=\text{3348}\approx 3350~y$