SITUATION # 2: Every morning we drink milk to strengthen our bones. You prepare a 100ml with a 5% powdered milk mix solution for your mother.
She asks you how many grams of milk you used for her drinks. What
would be your response to her question?

The amount of milk present on 5 %  of 100 ml milk powder solution is 95 grams.

The solution was prepared by dissolving 5% milk powder in 100 ml of the solution.

The amount of milk powder will be = ml

The amount of milk powder = 5 ml.

The amount of milk = Total - amount of milk powder

The amount of milk = 100 - 5

The amount of milk = 95 ml.

Since the density of milk = 1 gm/ml

The amount of milk in 95 ml of solution = 95 grams.

In the solution of 5 % milk powder in 100 ml milk, there would be 95 grams of milk.

For more information about solutions, refer the link;

link

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

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.