The Lewis structure for CH_2 F_2 is shown to the right. What is the polarity of
ID: 1067557 • Letter: T
Question
The Lewis structure for CH_2 F_2 is shown to the right. What is the polarity of the molecule and why? (A) The molecule is polar because there is a net dipole moment. (B) The molecule is polar because there is not a net dipole moment. (C) The molecule Is non-polar because there is a net dipole moment. The molecule Is non-polar because there is not a net dipole moment. What is the molecular geometry of H_2O, and what id the hybridization at the central atom? What type of intermolecular forces exists between the two different substances in an aqueous solution of sodium chloride? (A) dipole-dipole (B) dipole-induced dipole (D)Ion induced dipole At what temperature will the substance whose phase diagram is given below sublime at when the substance is at a pressure of 1 atm? What is the vapor pressure of a benzene- toluene solution that contains equal moles of benzene and toluene 80 degree C? (A) 145 mmHg (B) 210 mmHg (C) 300 mmHg (D) 545 mmHg Aqueous Solution A has a higher freezing point than aqueous Solution B. If the solute particles are the same size, what is true about the distance between them? (A) The solute particles Solution A are farther apart. (B) The solute particles in Solution A are closer together. (C) The distance between solute particles is the same in Solution A and Solution B. (D) The concentrations of the solutions must be known to answer this question. Which of the Mowing substances would you expect to be miscible with water? (A) CH_2CI_2 (B) CH_2OH (C) C_4H_6 (D) C_10H_21OHExplanation / Answer
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OPTION A
CH2F2 polar
CH2F2 the hydrogen is less electronegative than the carbon this implies there will be a net development of electrons towards the fluorine and the atom will be polar and have a net dipole minute.
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20
OPTION D
The oxygen particle in the H2O atom is sp3 hybridized. This is on account of when oxygen is reinforced with two particles, similar to it is in water, the three 2p orbitals and the 2s orbital consolidate to make four sp3 cross breed orbitals.
An atom of water has a BENTor twisted shape. The H-O-H bond edge in a particle of water is 104.5o, an edge that is likewise very near the 109.5o bond points of methane. A tetrahedral game plan of the three electron sets represents the rakish courses of action of the three particles.
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OPTION c
ion dipole
The water particles frame a dissolvable confine around each Na+ or Cl-particle, as suggested by the fluid state image (aq) taking after each of the items. The positive particle, Na+, is encompassed by water atoms that have the negative dipoles of the water, or the oxygen, guiding towards the cation.
For this situation, the anion Cl-is solvated by the positive dipoles of water, which are spoken to by hyrogen iotas. As a rule, when particles are available in water, every cation and anion is encompassed by a "pen" of fractional negative or incomplete positive charge, separately. These associations clarify why most ionic mixes are viewed as dissolvable in water, unless particularly named something else.
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