How many moles of nitrogen n are in 71.0g of nitrous oxide , n2o

Answer : The number of moles of nitrogen present in nitrous oxide are 3.22 moles.

Explanation : Given,

Mass of = 71.0 g

Molar mass of = 44 g/mole

First we have to calculate the moles of .

Now we have to calculate the moles of nitrogen in nitrous oxide.

In nitrous oxide , there are 2 moles of nitrogen and 1 mole of oxygen.

As, 1 moles of contains 2 moles of nitrogen

So, 1.61 moles of contains of nitrogen

Therefore, the number of moles of nitrogen present in nitrous oxide are 3.22 moles.

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.