Answer:
They form crystals, they have really high boiling points, They have higher enthalpies of fusion and vaporize than an molecular compound, the are brittle
Explanation:
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<u>Answer:</u> The concentration of radon after the given time is ![3.83\times 10^{-30}mol/L](https://tex.z-dn.net/?f=3.83%5Ctimes%2010%5E%7B-30%7Dmol%2FL)
<u>Explanation:</u>
All the radioactive reactions follows first order kinetics.
The equation used to calculate half life for first order kinetics:
![t_{1/2}=\frac{0.693}{k}](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%3D%5Cfrac%7B0.693%7D%7Bk%7D)
We are given:
![t_{1/2}=3.82days](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%3D3.82days)
Putting values in above equation, we get:
![k=\frac{0.693}{3.82}=0.181days^{-1}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B0.693%7D%7B3.82%7D%3D0.181days%5E%7B-1%7D)
Rate law expression for first order kinetics is given by the equation:
![k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B2.303%7D%7Bt%7D%5Clog%5Cfrac%7B%5BA_o%5D%7D%7B%5BA%5D%7D)
where,
k = rate constant = ![0.181days^{-1}](https://tex.z-dn.net/?f=0.181days%5E%7B-1%7D)
t = time taken for decay process = 3.00 days
= initial amount of the reactant = ![1.45\times 10^{-6}mol/L](https://tex.z-dn.net/?f=1.45%5Ctimes%2010%5E%7B-6%7Dmol%2FL)
[A] = amount left after decay process = ?
Putting values in above equation, we get:
![0.181days^{-1}=\frac{2.303}{3.00days}\log\frac{1.45\times 10^{-6}}{[A]}](https://tex.z-dn.net/?f=0.181days%5E%7B-1%7D%3D%5Cfrac%7B2.303%7D%7B3.00days%7D%5Clog%5Cfrac%7B1.45%5Ctimes%2010%5E%7B-6%7D%7D%7B%5BA%5D%7D)
![[A]=3.83\times 10^{-30}mol/L](https://tex.z-dn.net/?f=%5BA%5D%3D3.83%5Ctimes%2010%5E%7B-30%7Dmol%2FL)
Hence, the concentration of radon after the given time is ![3.83\times 10^{-30}mol/L](https://tex.z-dn.net/?f=3.83%5Ctimes%2010%5E%7B-30%7Dmol%2FL)
Answer:
See image attached for structure of CH3Br
Explanation:
A lewis structure structure is a representation of a covalent compound in which dots are used to show valence electrons, lone pairs and bonding electrons. The system was introduced by sir G.N Lewis in 1916 in his article titled 'Atom and Molecule'. They are also called dot electron diagrams of molecules. CH3Br molecule contains a total of fourteen electrons. Valence electrons are shown by dots around the atom of each element as clearly seen in the image attached.
Answer:
The number of electrons, in turn, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element