Because they are more in close proximity to the core atom's nucleus than lone pairs are, lone pairs reject other lone pairs more strongly than bonding pairs do effect the bond angle.
When a single pair of electrons at the central atom begins to resist the bound pair of electrons, the bond angle decreases and the bonds are slightly shifted inward. It moves existing atoms closer together and modifies their geometry. It's equivalent to include an atom. When there is an increase in back bonding, the bond angle rises. Because the lone pair electrons of the two atoms reject one another, adjacent atoms in a molecule that have lone pair electrons will not be kept together in their bond as securely.
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I’m not really sure but i think it’s 2.
In order to find the percent yield of a reaction, we need to use the theoretical yield and actual yield into a formula, which is the following:
%yield = (actual yield/theoretical yield)*100
Adding the values from the question in the formula:
%yield = (4.5/10.7)*100
%yield = 42
The percent yield for this reaction will be 42%
