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Tutor profile: Alexander T.

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Alexander T.
Tutor for two years
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Questions

Subject: Physics (Newtonian Mechanics)

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Question:

What is an important quality of velocity in the x-direction when answering a projectile motion problem? What is the velocity in the y-direction when the projectile is at it's highest point?

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Alexander T.
Answer:

Velocity in the x-direction stays constant throughout the projectile motion. This is because there is no acceleration acting on the x-direction and is a result of Newton's 1st Law. The velocity in the y-direction is zero at the highest point because the projectile is only traveling in the x-direction at this point. This information can be used to break a projectile motion problem into parts and help solve the missing information.

Subject: Chemistry

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Question:

What is electronegativity, and why is it important to note for covalent bonds?

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Alexander T.
Answer:

Electronegativity is the pull that an atom has on the electron cloud between two atoms sharing electrons. A greater difference in electronegativity leads to a more polar bond with a larger dipole moment. It is important to note for covalent bonds because electronegativity will affect the strength of acids/bases. The greater the difference in electronegativity between the two atoms in a molecule, the stronger the acid/base will be.

Subject: Basic Chemistry

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Question:

What is the difference between a Lewis Acid/Base and a Bronsted-Lowry Acid/Base? Can a molecule act as both or only one?

Inactive
Alexander T.
Answer:

A Lewis Acid accepts an electron pair during a chemical reaction. A Lewis Base donates an electron pair during a chemical reaction. A Bronsted-Lowry acid accepts hydrogen ions. A Bronsted-Lowry Base donates hydrogen ions. A molecule that is involved in a REDOX reaction with the involvement of hydrogen ions can act as both a Lewis and Bronsted-Lowry Acid/Base.

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