Answer:
Bond energy of carbon-fluorine bond is 485 kJ/mol
Explanation:
Enthalpy change for a reaction, is given as:
![\Delta H_{rxn}=\sum [n_{i}\times (E_{bond})_{i}]-\sum [n_{j}\times (E_{bond})_{j}]](https://tex.z-dn.net/?f=%5CDelta%20H_%7Brxn%7D%3D%5Csum%20%5Bn_%7Bi%7D%5Ctimes%20%28E_%7Bbond%7D%29_%7Bi%7D%5D-%5Csum%20%5Bn_%7Bj%7D%5Ctimes%20%28E_%7Bbond%7D%29_%7Bj%7D%5D)
Where 
and 
represents average bond energy in breaking "i" th bond and forming "j" th bond respectively.
and 
are number of moles of bond break and form respectively.
In this reaction, one mol of C=C, four moles of C-H and one mol of F-F bonds are broken. One mol of C-C bond, four moles of C-H bonds and two moles of C-F bonds are formed
So, 
or, 
or, 
So bond energy of carbon-fluorine bond is 485 kJ/mol
Answer : The volume of gas required to provide 18.01L of gas at the surface is, 3.6 L
Explanation :
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
where,
= initial pressure of gas = 12.8 atm
= final pressure of gas = 1.0 atm
= initial volume of gas = ?
= final volume of gas = 18.01 L
= initial temperature of gas = 
= final temperature of gas = 
Now put all the given values in the above equation, we get:
Therefore, the volume of gas required to provide 18.01L of gas at the surface is, 3.6 L
Answer: option A
The electrons are attracted to the protons
Explanation:
Electrostatics is a force that pull or push objects without the objects actually touching them.
Electrons have a negative charge and protons have a positive charge. Positive and negative attract each other so therefore the electrons are attracted to the protons.
It’s not B because the electrons aren’t 100% pushing away from the nucleus.
It’s not C because the electrons are not attracted to the neutrons. Neutrons don’t have a charge; they have a net zero charge.
It’s not D because the electrons can’t attract each other. Electrons have a negative charge and negative charges don’t attract each other; they push away from each other instead.
Hope that helps.
If you need a better explanation just let me know
The compound is Octane since it has 8 carbons on the parent chain and has only single carbon to carbon bonds.
