(YOU MUST SHOW YOUR WORK AS MODELED IN CLASS IN ORDER TO RECEIVE CREDIT!!!) Answer The Following Questions:

1. What is the mass in grams of 2.64 mol of sulfur dioxide, SO2?

2. Calculate the mass of 3.57 mol of magnesium nitrate, Mg(NO3)2.

3. How many moles are there in 79.0 g Li2SO4?

4. What is the mass in grams of hydrogen in 215 g of sugar, C12H22O11?

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

a

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.