Answer: The density of the given vapor is 0.939 g/L.
Explanation:
Given: Pressure = 233 mm Hg (1 mm Hg = 0.00131579 atm) = 0.31 atm
Temperature =
= (25 + 273) K = 298 K
According to the ideal gas equation,

where,
P = pressure
V = volume
m = mass
M = molar mass
R = gas constant = 0.0821 L atm/mol K
T = temperature
This formula can be re-written as follows.
(where,
)
Hence, formula used to calculate density of diethy ether (molar mass = 74.12 g/mol) vapor is as follows.

Substitute values into the above formula as follows.

Thus, we can conclude that the density of the given vapor is 0.939 g/L.
Answer:
the molecular formula of paradichlorobenzene is C6H4CL2
Answer: The Note
Explanation: Neurotransmitters are endogenous chemical substances that transmits signals through a NEUROMUSCULAR JUNCTIONS.
The signals are transmit from one NERVE CELL TO THE TARGET POINT such as Muscle cell,gland cell etc. Neurotransmissiom require the presence of synapse(the structure or medium through which neurosignals which can be an electrical or chemical signals to pass through).