Answer: The numerical value for Bond energy of 
is -238 kJ/mol
Explanation:
The balanced chemical reaction is,
The expression for enthalpy change is,
![\Delta H=\sum [n\times B.E(reactant)]-\sum [n\times B.E(product)]](https://tex.z-dn.net/?f=%5CDelta%20H%3D%5Csum%20%5Bn%5Ctimes%20B.E%28reactant%29%5D-%5Csum%20%5Bn%5Ctimes%20B.E%28product%29%5D)
![\Delta H=[(n_{A_2}\times B.E_{A_2})+(n_{B_2}\times B.E_{B_2}) ]-[(n_{AB}\times B.E_{AB})]](https://tex.z-dn.net/?f=%5CDelta%20H%3D%5B%28n_%7BA_2%7D%5Ctimes%20B.E_%7BA_2%7D%29%2B%28n_%7BB_2%7D%5Ctimes%20B.E_%7BB_2%7D%29%20%5D-%5B%28n_%7BAB%7D%5Ctimes%20B.E_%7BAB%7D%29%5D)
![\Delta H=[(1\times x)+(1\times B.E_{B_2}) ]-[(2\times 2x)]](https://tex.z-dn.net/?f=%5CDelta%20H%3D%5B%281%5Ctimes%20x%29%2B%281%5Ctimes%20B.E_%7BB_2%7D%29%20%5D-%5B%282%5Ctimes%202x%29%5D)
where,
n = number of moles
If 
Now put all the given values in this expression, we get
![-321=[(1\times x)+(1\times 393)]-[(2\times 2x)]](https://tex.z-dn.net/?f=-321%3D%5B%281%5Ctimes%20x%29%2B%281%5Ctimes%20393%29%5D-%5B%282%5Ctimes%202x%29%5D)
Therefore, the bond energy of is -238 kJ/mol
Answer:
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
Explanation:
The activity series helps us to easily define whether or not a reaction will occur.
Elements at the top of the activity series are highly reactive and will always displace those at the bottom of the series in any reaction.
With the above information in mind, let us answer the questions given above.
Ag + NaNO₃ —> Na + AgNO₃
The above reaction will not occur because Na is higher than Ag in the activity series. Thus, Ag cannot displace Na from solution.
Pb + Mg(NO₃)₂ —> Pb(NO₃)₂ + Mg
The above reaction will not occur because Mg is higher than Pb in the activity series. Thus, Pb cannot displace Mg from solution.
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
The above reaction will occur because Mg is higher than Fe in the activity series. Thus, Mg will displace Fe from solution.
Cu + Mg(NO₃)₂ —> Cu(NO₃)₂ + Mg
The above reaction will not occur because Mg is higher than Cu in the activity series. Thus, Cu cannot displace Mg from solution.
From the above illustration, only
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
Will occur.
The price of 1 gallon of gasoline in U.S. dollars in France is $4.87
Answer:
hey just where are the rections keep a pic
Explanation:
okay?.........................................
The lime water would become cloudy :)
