In the reaction of zn with hci, 140.15 g of zncl2 was actually formed, although the theoretical yield
was 143 g. what was the percent yield?

Percent yield of ZnCl₂ = 98 %

Explanation:

Data Given:

Actual yield of ZnCl₂ = 140.15 g

Theoretical yield of ZnCl₂ =  143 g.

percent yield = ?

Solution:

Formula used

          Percent yield = Actual yield / Theoretical yield x 100%

Put values in the formula

           Percent yield = 140.15 g / 143 g x 100%

           Percent yield = 98.007 %

Rounded to significant figure

Percent yield of ZnCl₂ = 98 %

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.