A student is asked to develop a model to illustrate the life span of our sun. Which factors must be included in the model?
Select all that apply.
A size
B color
C time scale
D composition
E location of the sun in the universe
F distance between the sun and other stars

the answer is 303.15 or 303

fe 55.85 g/mol and h2o 18.02 g/mol.

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.