Answer:
![h=1.60\mu m](https://tex.z-dn.net/?f=h%3D1.60%5Cmu%20m)
Explanation:
Hello,
In this case, given the density and the mass of the aluminum foil, we can compute the occupied volume as shown below:
![\rho =\frac{m}{V}\\ \\V=\frac{m}{\rho}=\frac{2.07g}{2.7g/cm^3} =0.767cm^3](https://tex.z-dn.net/?f=%5Crho%20%3D%5Cfrac%7Bm%7D%7BV%7D%5C%5C%20%5C%5CV%3D%5Cfrac%7Bm%7D%7B%5Crho%7D%3D%5Cfrac%7B2.07g%7D%7B2.7g%2Fcm%5E3%7D%20%20%3D0.767cm%5E3)
Next, since the volume is defined as:
![V=24cm*20cm*h](https://tex.z-dn.net/?f=V%3D24cm%2A20cm%2Ah)
Whereas
accounts for its thickness, we can find it to be:
![h=\frac{V}{24cm*20cm}=\frac{0.767cm^3}{20cm*24cm}\\ \\h=1.60x10^{-3}cm*\frac{10000\mu m}{1cm} \\\\h=1.60\mu m](https://tex.z-dn.net/?f=h%3D%5Cfrac%7BV%7D%7B24cm%2A20cm%7D%3D%5Cfrac%7B0.767cm%5E3%7D%7B20cm%2A24cm%7D%5C%5C%20%20%5C%5Ch%3D1.60x10%5E%7B-3%7Dcm%2A%5Cfrac%7B10000%5Cmu%20m%7D%7B1cm%7D%20%5C%5C%5C%5Ch%3D1.60%5Cmu%20m)
Regards.
Answer:
The concentration of an anthracene solution is ![c = 3.560 *10^{-5}M](https://tex.z-dn.net/?f=c%20%3D%203.560%20%2A10%5E%7B-5%7DM)
Explanation:
From the question we are told that
The incident beam
is ![=1532](https://tex.z-dn.net/?f=%3D1532)
The fluorescence intensity is ![I = 775](https://tex.z-dn.net/?f=I%20%3D%20775)
The length of the medium is b = 0.875 cm
The molar extinction coefficient is ![\epsilon = 9.5 *10^3 M^{-1} cm^{-1}](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%209.5%20%2A10%5E3%20M%5E%7B-1%7D%20cm%5E%7B-1%7D)
The proportionality constant k = 0.30
According to Lambert law the Absorbance of the anthracene solution is mathematically represented as
![A = log (I_O/I)](https://tex.z-dn.net/?f=A%20%3D%20log%20%28I_O%2FI%29)
Where ![I_o =P_o](https://tex.z-dn.net/?f=I_o%20%3DP_o)
and A is the Absorbance
Substituting value
![A = log( (1532)/(775))](https://tex.z-dn.net/?f=A%20%3D%20log%28%20%281532%29%2F%28775%29%29)
![=0.2960](https://tex.z-dn.net/?f=%3D0.2960)
Generally beers law can be represented mathematically as
![A = \epsilon c l](https://tex.z-dn.net/?f=A%20%3D%20%5Cepsilon%20c%20l)
where c is the concentration of an anthracene solution
Making c the subject of the formula
![c = \frac{A}{cl}](https://tex.z-dn.net/?f=c%20%3D%20%5Cfrac%7BA%7D%7Bcl%7D)
Substituting 0.875 cm for length = b ,
We have
![c = \frac{0.2960}{9.5*10^{3} * 0.875}](https://tex.z-dn.net/?f=c%20%3D%20%5Cfrac%7B0.2960%7D%7B9.5%2A10%5E%7B3%7D%20%2A%200.875%7D)
![c = 3.560 *10^{-5}M](https://tex.z-dn.net/?f=c%20%3D%203.560%20%2A10%5E%7B-5%7DM)
Answer:
The reactivity of the halogen group (group 17) decreases
from top to bottom within the group. Fluorine is the
most reactive halogen, while iodine is the least. Since
chlorine is above <em><u>bromine</u></em>, it is more reactive than
bromine and can replace it in a halogen replacement
reaction.
hope it help ❤️
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Answer:
Diffusion means that particles travel from a higher concentration to a lower concentration region before balance is achieved. The semi-permeable membrane is present in osmosis, so that only solvent molecules can travel freely to equalize the levels.