1. Write one "Introduction tweet" (280 characters or less, including spaces) that explains to your audience why they should care about whether the U. S. Mint specifications give the correct density. 2. Write 1-2 "Methods Tweet" that explains to your audience (briefly) what you did and why your measurements of volume and mass were able to give you the density.

let that person have a turn to speak : )

yes

ya te ayud espera

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.