Answer 10
Explication nose
This reaction is most likely to fall under SN2 because the
thing called carbonication does not occur in SN1. The carbon forms a partial
bond with the nucleophile during the intermediate phase and the leaving group.
So for this question the reaction will fall under SN2.
Answer:
The concentration of chloride ion is ![2.82\times10^{-3}\;mol/L](https://tex.z-dn.net/?f=2.82%5Ctimes10%5E%7B-3%7D%5C%3Bmol%2FL)
Explanation:
We know that 1 ppm is equal to 1 mg/L.
So, the
content 100 ppm suggests the presence of 100 mg of
in 1 L of solution.
The molar mass of
is equal to the molar mass of Cl atom as the mass of the excess electron in
is negligible as compared to the mass of Cl atom.
So, the molar mass of
is 35.453 g/mol.
Number of moles = (Mass)/(Molar mass)
Hence, the number of moles (N) of
present in 100 mg (0.100 g) of
is calculated as shown below:
![N=\frac{0.100\;g}{35.453\;g/mol}=2.82\times 10^{-3}\;mol](https://tex.z-dn.net/?f=N%3D%5Cfrac%7B0.100%5C%3Bg%7D%7B35.453%5C%3Bg%2Fmol%7D%3D2.82%5Ctimes%2010%5E%7B-3%7D%5C%3Bmol)
So, there is
of
present in 1 L of solution.
Answer:
The effective nuclear charge for a valence electron in oxygen atom: ![Z_{eff} = 4.55](https://tex.z-dn.net/?f=Z_%7Beff%7D%20%3D%204.55)
Explanation:
Effective nuclear charge
is the net nuclear charge experienced by the electron in a given atom. It is always less than the actual charge of the nucleus [Z], due to shielding by electrons in the inner shells.
<em>It is equal to the difference between the actual nuclear charge or the atomic number (Z) and the shielding constant (s). </em>
![\Rightarrow Z_{eff} = Z - s](https://tex.z-dn.net/?f=%5CRightarrow%20Z_%7Beff%7D%20%3D%20Z%20-%20s)
<u>For an oxygen atom</u>-
Electron configuration: (1s²) (2s² 2p⁴)
<em>The atomic number (actual nuclear charge): </em>Z = 8
The shielding constant (s) for a valence electron can be calculated by using the Slater's rules:
⇒ s = 5 × 0.35 + 2 × 0.85 = 1.75 + 1.7 = 3.45
<u><em>Therefore, the effective nuclear charge for a valence electron in oxygen atom is:</em></u>
![Z_{eff} = Z - s = 8 - 3.45 = 4.55](https://tex.z-dn.net/?f=Z_%7Beff%7D%20%3D%20Z%20-%20s%20%3D%208%20-%203.45%20%3D%204.55)
<u>Therefore, the effective nuclear charge for a valence electron in oxygen atom:</u> ![Z_{eff} = 4.55](https://tex.z-dn.net/?f=Z_%7Beff%7D%20%3D%204.55)