Use the equation 2cu+o2=2cuo to find how many miles of copper react to form 3.64 mil cuo

Complete question:

Use the equation 2Cu+O2 →2CuO, to find how many grams of copper react to produce 3.64 mol CuO.

grams of Cu = 231.14  grams

If it is the number of moles

since both Cu and CuO exist in the reaction as 2 mole each ,That means 3.64 moles of CuO will need 3.64 moles of Cu to react.  

Explanation:

Write and balance the equation of the reactions

2Cu+O2 →2CuO

The equation is balanced

Atomic mass of cu = 63.5 g/mol

mass of 2Cu in the reaction = 127  grams

Molar mass of Cuo = 63.5 + 16 = 79.5

The mass of 2Cuo in the reaction = 2 × 79.5  = 159   grams

number of moles = mass/molar mass

we need to convert 3.64 moles to mass(grams)

3.64 = mass/79.5

mass = 3.64 × 79.5

mass of copper oxide = 289.38

grams

Since 127 grams of copper give 159 grams of Cuo

      ? grams of copper will give 289.38  grams of Cuo

cross multiply

grams of Cu = 289.38  × 127/159

grams of Cu = 36751.26

/159

grams of Cu = 231.14  grams

If it is the number of moles

since both Cu and CuO exist in the reaction as 2 mole each ,That means 3.64 moles of CuO will need 3.64 moles of Cu to react.  

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.