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dybincka [34]
3 years ago
7

The density of an object is defined as mass per unit volume. Mathematically we write that:

Chemistry
2 answers:
Snezhnost [94]3 years ago
4 0
M=DxV V=M/D
(answer limit etcetcetc)))))
GuDViN [60]3 years ago
3 0
For the mass M=V x D

for the volume V= M / D
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Answer:

2578.99 years

Explanation:

Given that:

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So,

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C left = [A_t]=\frac{11.20\ per\ minute}{15.3\ per\ minute\ per\ gram}\times [A_0]= 0.7320[A_0]

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So,  

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

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

The rate constant, k = 0.000120968 year⁻¹

Time =?

Using integrated rate law for first order kinetics as:

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

So,  

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

\frac {0.7320[A_0]}{[A_0]}=e^{-0.000120968\times t}

0.7320=e^{-0.000120968\times t}

ln\ 0.7320=-0.000120968\times t

<u>t = 2578.99 years</u>

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