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In which one of the following compounds is the oxidation number of phosphorus equal to +5?
Anxiety
A feeling of worry, nervousness, or unease about something with an uncertain outcome.
Depression
A mental health condition characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in activities, often affecting daily functioning.
Sleep
A naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, and inhibition of nearly all voluntary muscles.
Cognition
The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.
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