A Flask Has a Mass of 78

question 69

Multiple Choice

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H₂SO₄, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm³ at the temperature of the measurement.)

• A)1.992 g/cm ³
• B)1.840 g/cm ³
• C)1.729 g/cm ³
• D)1.598 g/cm ³
• E)0.543 g/cm ³

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Definitions:

Systematic Desensitization

A behavioral therapy technique used to reduce phobic or anxiety responses through gradual exposure to the feared object or situation.

Deep-Breathing Exercises

Techniques that involve conscious deep and often slow inhalations and exhalations used to reduce stress, calm the nervous system, and improve respiratory function.

Fear-Provoking Situation

An event or circumstance that induces feelings of fear or anxiety.

Cognitive-Behavioral Therapy

A type of psychotherapeutic treatment that helps patients understand the thoughts and feelings that influence behaviors, aimed at changing negative patterns of thinking or behavior.