Carbon Tetrachloride, Once Widely Used in Fire Extinguishers and as a Dry

question 127

Multiple Choice

Carbon tetrachloride, once widely used in fire extinguishers and as a dry cleaning fluid, has been found to cause liver damage to those exposed to its vapors over long periods of time. What is the boiling point of a solution prepared by dissolving 375 g of sulfur (S₈, 256.5 g/mol) in 1250 g of CCl₄? (For CCl₄, K_b = 5.05°C/m; boiling point of pure CCl₄ = 76.7°C)

• A) 70.8°C
• B) 75.2°C
• C) 78.2°C
• D) 82.6°C
• E) 85.7°C

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Definitions:

Synapse

The space between neurons where communication takes place through neurotransmitters.

Inhibitory Signals

neural or chemical messages that decrease the likelihood of a neuron firing, thus reducing or preventing an action or response.

Integration Phase

The integration phase is a stage in various processes (psychological therapy, project development) where different elements or experiences are combined and fully assimilated.

Presynaptic Neuron

The neuron that sends a signal across the synaptic gap to another neuron during neurotransmission.