Astudent tries to make diphosphorus trioxide using the reaction below. he adds exactly 20.00 grams of phosphorus to an excess of oxygen gas. calculate the theoretical yield of how much p2o3 will be made

p4(s) + o2(g) ——> p2o3(s)

Mass = 87.952 g

Explanation:

Given data:

Mass of phosphorus = 20.0 g

Theoretical yield of P₂O₃ = ?

Solution:

Chemical equation:

P₄ + 3O₂  →  2P₂O₃

Number of moles of phosphorus:

Number of moles = mass/ molar mass

Number of moles = 20.0 g / 123.9 g/mol

Number of moles = 0.2 mol

Now we will compare the moles of phosphorus with P₂O₃.

                         P₄         :          P₂O₃

                          1           :           2

                         0.2        :         2/1×0.2 = 0.4 mol

Theoretical yield:

Mass = number of moles × molar mass

Mass = 0.4 mol  × 219.88 g/mol

Mass = 87.952 g

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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.