For questions 3 and 4. use the balanced reaction below: 2 Fe2O3 + 3C 4 Fe + 3 CO2
3) How many moles of Fe will be produced if 4.64 grams of CO2 are produced?
a. 0.14 moles Fe
b. 0.89 moles Fe
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c. 1.14 moles Fe
d. 3.89 moles Fe
Submission
Due: Today

moles of Fe = 0.14

Given

Reaction

2 Fe2O3 + 3C ---> 4 Fe + 3 CO2

Required

moles of Fe

Solution

mol of CO2 :

= mass : MW

= 4.64 g : 44 g/mol

= 0.105

From the equation, mol ratio Fe : CO2 = 4 : 3, so mol Fe :

= 4/3 x mol CO2

= 4/3 x 0.105

= 0.14

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.