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Calculate the H+ ion concentration in lemon juice having a pH of 2.40.
Freud
Sigmund Freud was an Austrian neurologist and the founder of psychoanalysis, a clinical method for treating psychopathology through dialogue between a patient and a psychoanalyst.
Dream
A collection of ideas, visuals, and feelings that happen in an individual's mind while they are sleeping.
Melatonin
A hormone produced by the pineal gland that regulates sleep-wake cycles and is often used as a dietary supplement to treat insomnia.
Sleepiness
The state or condition of feeling the need for sleep, characterized by tiredness, reduced alertness, and a lack of energy.
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