2. a plastic ball with a volume of 19.7 cm has a mass of 15.8 g. would this ball
sink or float in a container of gasoline? (the density of gasoline is 0.77 g/cm)
3. would the density of a person be the same on the surface of the earth and on the
surface of the moon? explain.
4. what is the symbol and meaning of these common metric prefixes: (see geology
locker for )
(a) milli
(b) nano

2: it would sink

3: no cause the moon has less gravitational pull

4: A- millimeter B- nano second

it would be a gas formation

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.