A Compound X Has a Molecular Ion Peak in Its

question 16

Multiple Choice

A compound X has a molecular ion peak in its mass spectrum at m/z 136.What information does this tell us about X?

• A)X has a molecular mass of 136.
• B)The molecular formula for X is C₈H₈O₂.
• C)The empirical formula for X is C₄H₄O.
• D)Both A (X has a molecular mass of 136)and B (The molecular formula for X is C₈H₈O₂)are true.
• E)Statements (X has a molecular mass of 136),(The molecular formula for X is C₈H₈O₂),and (The empirical formula for X is C₄H₄O)are all true.

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Definitions:

Subtypes

Variants or specific kinds within a larger category, often used to classify nuanced differences in disorders, diseases, or phenomena.

Premenstrual Dysphoric Disorder

A set of symptoms occurring immediately prior to onset of menses characterized by a mixture of depression, anxiety and tension, and irritability and anger; may occur in mood swings during the week before onset of menses and subside once menses has begun.

Depressive Disorders

A set of disorders characterized by depressed mood and/or anhedonia (and not mania).

Distinguishes

Sets apart or identifies as different or unique through comparison or analysis.