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Tutor profile: Bryant L.

Inactive
Bryant L.
Biochemistry Undergraduate at UC Davis
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Questions

Subject: Organic Chemistry

TutorMe
Question:

Why does the tert-butyl substituent of tert-butylcyclohexane favor the equitorial position more than the axial position?

Inactive
Bryant L.
Answer:

When in the axial position, the tert-butyl substituent exhibits large steric hindrance, as its electrons will repulse the electrons of the other hydrogens in axial position. Therefore, tert-butylcyclohexane favors having this bulky group in the equitorial position.

Subject: Chemistry

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Question:

What is the molecular shape of NH3. Explain your answer.

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Bryant L.
Answer:

Trigonal pyramidal. NH3 has a total of 8 valence electrons interacting (5 from Nitrogen, 1 from each Hydrogen). NH3 can be drawn with 3 single N-H bonds, with a free lone pair of electrons on the central nitrogen. This structure has 3 bonds and 1 lone pair of electrons on the central nitrogen, resulting in a trigonal pyramidal shape.

Subject: Physics

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Question:

Two balls of equal mass are thrown with the same initial speed. Ball A is thrown straight up while Ball B is thrown at a 45 degree angle above the ground. Compare the ball's initial kinetic energy.

Inactive
Bryant L.
Answer:

Both balls have the same initial kinetic energy, as the have the same speed and mass. We can mathematically confirm this with the kinetic energy equation, KE=(1/2)mv^2.

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