Given a = 9, B = 13, and C =

question 156

Multiple Choice

Given a = 9, b = 13, and c = 8, use the Law of Cosines to solve the triangle for the value of A.Round your answer to two decimal places. Figure not drawn to scale

• A)99.59°
• B)80.44°
• C)37.36°
• D)43.05°
• E)60.33°

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Definitions:

Optical Activity

The ability of a molecule to rotate plane-polarized light, a property used to distinguish between enantiomers in stereochemistry.

Enantiomers

Molecules that are mirror images of each other but cannot be superimposed upon one another, similar to left and right hands.

Polarimeter Tube

A component of a polarimeter used to measure the rotation of polarized light as it passes through an optically active substance.

Polarized Light

Light waves in which the vibrations occur in a single plane.