Solution. Identify the concentration of the nye 10. Determine the volume/volume percent solution made by combining 25 ml of ethanol with enough water to
produce 200 mL of the solution.

12.5%

Explanation:

Given data:

Volume/Volume % = ?

Volume of solute = 25 mL

Volume of solution = 200 mL

Solution:

Formula:

v/v% = ( volume of solute / volume of solution ) × 100

by putting values,

v/v% = ( 25 mL / 200 mL)  × 100

v/v% = 0.125  × 100

v/v% = 12.5%

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2

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.