Determine which set of properties correctly describes a salt crystal (NaCl)? A. Dense, soluble in water, brittle, ionic lattice, high melting point B. Malleable, brittle, soluble in oil or gasoline, high melting point, simple structure C. Ionic lattice, brittle, soluble in oil or gasoline, low melting point, does not conduct electricity D. Dense, malleable, soluble in water, conducts electricity, metallic lattice

A. Dense, soluble in water, brittle, ionic lattice, high melting point

Explanation:

NaCl crystalls are in an ionic lattice (which is why they look crystalline to begin with) and they are very brittle (will break into tiny crystals or pieces under stress - typical of ionic lattices.) NaCl melts at 801 C (so very very high MP) due to ionic bonding, and since ionic bonds dissolve in polar solutions, NaCl dissolves in water (which is polar). NaCl is also dense (NaCl solution is even denser than water)

i look it up online and i'll tell you

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.