TANswER, the word or phrase that best completes each or answers the question. in
ID: 480867 • Letter: T
Question
TANswER, the word or phrase that best completes each or answers the question. intramolevular forces determine the properties of a substance and 2) London DNspersion Forces tend to in strength with increasing molecular 3) When lattice occur at the corners and at the center of a unit cell, the cell is called 3) points 4) When lattice points occur at the center of each face, as well as each corner of a unit cell, 4) the cell is called 5) 5) The formula weight of Fec 6H20 is 6) 6) How many atoms are contained in a face-centered cubic unit cell? What is the osmotic pressure (in atm) of a oo40 M solution of a nonelectrolyte at 30.0 7) 8) Physical properties of a solution that depend on the quantity of the solute particles present, but not the kind or identity of the particles, are termed properties. 9) The phenomenon used colloids and true solutions is called the to differentiate effect. ULTIPLE CHOICE. choose the one alternative that best completes the statement or answers th 10) The Henry's law constant for helium gas in water at 30 oct is 37o x 10 4 Mlatm. When the partial pressure of helium above a sample of water is 0.400 atm, the concentration of heli the water is M" A) 3.70 x B) 0.800 D) 1.48 x 104 E) 9.25 x 10-4 which one of the following substances would be the least soluble in ca4 A) C4H10 B) Na2SO4 D) CH3CH2 CH2CH20H E) HCI n of oach corn ar atom i actually within the volume oExplanation / Answer
Short questions
1)In general ,intramolecular forces determine the chemical properties of a substance,and intermolecular forces determine its physical properties.
reason-Intramolecular forces acts between the combining atoms of the molecules,these are the bonding forces and hence may be either ionic or covalent or coordination bonding forces.Hence,the chemical properties varies with the type of bonding.Like, ionic compounds reacts with ionic compounds mostly.
Also ,intermolecular forces acts between molecules and is responsible for holding the molecules together.It may be of several types-dipole-dipole forces,hydrogen bonding,london forces etc .For stronger attractive forces,the molecules are tightly bound to each other giving high melting and boiling points,hard texture and soon...
2)London dispersion forces tend to increase in strength with increasing molecular weight
As these are the forces of attraction/repulsion in non-polar molecules that tends to become temporary dipoles due to dispersion of electron density within the molecule.For molecules with high molecular weight ,the size of the molecule increases and so increases its polarizability.The electrons that are now farther from the nucleus tends to be attracted by protons and hence electron cloud easily distorted.
3)B.c.c or body centred cubic lattice( one lattice point at the centre )
4) Fcc or face centred cubic lattice (six lattice points at the six faces)
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