A 0.271g sample of an unknown vapor occupies 294ml at 140C and 874mmHg. The emperical formula of the compound is CH2. How many m
1 answer:
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Answer : The Lewis-dot structure and resonating structure of is shown below.
Explanation :
Resonance structure : Resonance structure is an alternating method or way of drawing a Lewis-dot structure for a compound.
Resonance structure is defined as any of two or more possible structures of the compound. These structures have the identical geometry but have different arrangements of the paired electrons. Thus, we can say that the resonating structure are just the way of representing the same molecule.
First we have to determine the Lewis-dot structure of .
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.
In the Lewis-dot structure the valance electrons are shown by 'dot'.
The given molecule is,
As we know that carbon has '4' valence electrons, nitrogen has '5' valence electrons and hydrogen has '1' valence electrons.
Therefore, the total number of valence electrons in = 4 + 2(1) + 2(5) = 16
Now we have to determine the formal charge for each atom.
Formula for formal charge :
For structure 1 :
For structure 2 :
Answer: Option (d) is the correct answer.
Explanation:
The given data is as follows.
Tube diameter d = 10 mm = 0.01 m
Velocity of glycerol, v = 0.5 m/s
Density of glycerol () = 1240 kg/m3
Dynamic viscosity of glycerol () = 0.0813 pa.s
Reynolds number (Re) =
=
= 76.26
Therefore, according to Reynolds number we can say that flow is laminar.
Lt =
=
=
As it is known that 1 m = 1000 mm. Hence, in 0.03813 m will be equal to
= 38.13 mm
Thus, we can conclude that the transition length of glycerol is 38.13 mm.