The Rotation Spectrum of the HCl Molecule Suggests a Photon

question 8

Multiple Choice

The rotation spectrum of the HCl molecule suggests a photon in the far infrared (around 5.0 × 10−⁶ m) can excite the first rotational level. From this data, the moment of inertia of the HCl molecule (in kg ⋅ m²) is

• A) 2.8 × 10−⁴⁸
• B) 2.8 × 10−⁴⁹
• C) 2.8 × 10−⁴⁷
• D) 2.8 × 10−⁴⁶
• E) 2.8 × 10−⁴⁵

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