Styrofoam is composed of mostly of air, this means that it is a poor conductor. It traps air in small pockets, stopping the flow of hear energy, making Styrofoam an excellent insulator!
Dipole moment measures the polarity of the molecule that is measure of the separation of two opposite charges. Electronegativity difference between the atoms results dipole moment.
Dipole moment of bond is equal to the product of the magnitude of charge and distance between them (charges).
It is given by:
where,
= dipole moment
= magnitude of charge whether partially positive or negative charge.
= distance between charges.
Since, bond distance is larger than the bond distance, because of large partial charge on the atoms of ; from the definition of dipole moment (1.08) has smaller dipole moment than (1.82).
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Answer:
The answer to your question is molality = 0.34
Explanation:
Data
mass of NaBr = 14.57 g
mass of water = 415 g.
molality = ?
Process
1.- Calculate the molar mass of NaBr
NaBr = 23 + 80 = 103 g
2.- Calculate the moles of NaBr
103 g of NaBr ------------------ 1 mol
14.57 g of NaBr --------------- x
x = (14.57 x 1) / 103
x = 14.57 / 103
x = 0.141 moles
3.- Calculate the molality
molality = moles / volume
-Substitution
molality = 0.141 / .415
-Result
molality = 0.34