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omeli [17]
3 years ago
12

The radioactive isotope z has a half-life of 12 hours. after 2 days, the fraction of the original amount remaining is

Chemistry
1 answer:
nataly862011 [7]3 years ago
4 0
.5•.5•.5•.5=1/2•1/2•1/2•1/2=1/4•1/4=1/16
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Two atoms that isotopes of one another must have number of what
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The number of protons are same for the isotopes of an element.

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What causes the concentration of reactants to affect the reaction rate?
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The frequency of which type of electromagnetic wave is just higher than that of visible light?
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radio waves

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3 years ago
The practical limit to ages that can be determined by radiocarbon dating is about 41000-yr-old sample, what percentage of the or
Aloiza [94]

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In percentage, the sample of C-4 remains = 0.7015 %

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k=\frac {ln\ 2}{t_{1/2}}

k=\frac {ln\ 2}{5730}\ hour^{-1}

The rate constant, k = 0.000120968 year⁻¹

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Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

So,  

\frac {[A_t]}{[A_0]}=e^{-0.000120968\times 41000}

\frac {[A_t]}{[A_0]}=0.007015

<u>In percentage, the sample of C-4 remains = 0.7015 %</u>

3 0
3 years ago
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