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Molecular Orbital Theory Quiz

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Questions and Answers

What is the method for describing the electronic structure of molecules using quantum mechanics?

Valence bond theory
Density functional theory
Hartree–Fock model
Molecular orbital theory (correct)

Which theory approximates the states of bonded electrons as linear combinations of atomic orbitals?

Molecular orbital theory (correct)
Valence bond theory
Density functional theory
Hartree–Fock model

What do molecular orbitals in a molecule contain?

Atomic nuclei
Valence electrons (correct)
Electron pairs
Chemical bonds

What is the LCAO method used for in molecular orbital theory?

Determining molecular orbital wave functions (B) Signup and view all the answers

How are cij coefficients determined in the LCAO method?

By substituting the LCAO equation into the Schrödinger equation and applying the variational principle (D) Signup and view all the answers

What is the mechanical advantage of an inclined plane?

Equal to the ratio of the length of the sloped surface to the height it spans (A) Signup and view all the answers

What is the angle of friction, or angle of repose, on an inclined plane?

Equal to the arctangent of the coefficient of static friction between the surfaces (A) Signup and view all the answers

What is the main advantage of moving an object up an inclined plane compared to lifting it straight up?

Requires less force at the cost of an increase in the distance moved (A) Signup and view all the answers

What is the relationship between the mechanical energy (work) required to lift a given object by a given vertical distance and the inclined plane?

The same amount of work is required, but the inclined plane allows the same work to be done with a smaller force exerted over a greater distance (B) Signup and view all the answers

What is the relationship between the angle of friction and the coefficient of static friction?

The angle of friction is equal to the arctangent of the coefficient of static friction (D) Signup and view all the answers