Does it matter which of the two sp3sp3 hybrid orbitals are used to hold the two nonbonding electron pairs

No. All four hybrids are equivalent and the angles between them are all the same, so we can use any of the two to hold the nonbonding pairs.

Explanation:

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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the increase of protons   hope this