Question 13 (1 point) If you multiply the number you got in Q12 by 100, you get a perc

this percentage represent?

The percentage of energy that flows through the entire food v

ecosystem.

The percentage of energy from the lower level that was transf

trophic level up.

The percentage of organisms that exist at each trophic level.

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.

the answer is c.the valence of the atoms combine .

use quiz let it tells you all the answers thats what i use