Answer:
The average bond energy of the sulfur-oxygen bonds in sulfur dioxide is 519.5 kJ/mol.
Explanation:
ΔH = -123 kJ
We are given with:
![\Delta H_{S-F}=327 kJ/mol](https://tex.z-dn.net/?f=%5CDelta%20H_%7BS-F%7D%3D327%20kJ%2Fmol)
![\Delta H_{H-F}=565 kJ/mol](https://tex.z-dn.net/?f=%5CDelta%20H_%7BH-F%7D%3D565%20kJ%2Fmol)
![\Delta H_{H-O}=467 kJ/mol](https://tex.z-dn.net/?f=%5CDelta%20H_%7BH-O%7D%3D467%20kJ%2Fmol)
![\Delta H_{F-F}=154 kJ/mol](https://tex.z-dn.net/?f=%5CDelta%20H_%7BF-F%7D%3D154%20kJ%2Fmol)
![\Delta H_{S-O}=?](https://tex.z-dn.net/?f=%5CDelta%20H_%7BS-O%7D%3D%3F)
ΔH =
(Energies required to break bonds on reactant side) - (Energies released on formation of bonds on product side)
![\Delta H=(1 mol\times 4\times \Delta H_{S-F}+2 mol\times 2\times \Delta H_{H-O})-(1 mol\times 2\times \Delta H_{S-O}+4 mol\times 1\times\Delta H_{H-F})](https://tex.z-dn.net/?f=%5CDelta%20H%3D%281%20mol%5Ctimes%204%5Ctimes%20%5CDelta%20H_%7BS-F%7D%2B2%20mol%5Ctimes%202%5Ctimes%20%5CDelta%20H_%7BH-O%7D%29-%281%20mol%5Ctimes%202%5Ctimes%20%5CDelta%20H_%7BS-O%7D%2B4%20mol%5Ctimes%201%5Ctimes%5CDelta%20H_%7BH-F%7D%29)
![\Delta H=(1 mol\times 4\times 327 kJ/mol+2 mol\times 2\times 467 kJ/mol)-(1mol\times 2\times \Delta H_{S-O}+4 mol\times 1\times 565 kJ/mol)](https://tex.z-dn.net/?f=%5CDelta%20H%3D%281%20mol%5Ctimes%204%5Ctimes%20327%20kJ%2Fmol%2B2%20mol%5Ctimes%202%5Ctimes%20467%20kJ%2Fmol%29-%281mol%5Ctimes%202%5Ctimes%20%5CDelta%20H_%7BS-O%7D%2B4%20mol%5Ctimes%201%5Ctimes%20565%20kJ%2Fmol%29)
![-123 kJ=(1308 kJ+1868kJ)-(1mol\times 2\times \Delta H_{S-O}+2260 kJ)](https://tex.z-dn.net/?f=-123%20kJ%3D%281308%20kJ%2B1868kJ%29-%281mol%5Ctimes%202%5Ctimes%20%5CDelta%20H_%7BS-O%7D%2B2260%20kJ%29)
![1mol\times 2\times \Delta H_{S-O}=123 kJ+1308 kJ+1868kJ-2260 kJ](https://tex.z-dn.net/?f=1mol%5Ctimes%202%5Ctimes%20%5CDelta%20H_%7BS-O%7D%3D123%20kJ%2B1308%20kJ%2B1868kJ-2260%20kJ)
![\Delta H_{S-O}=\frac{1039 kJ}{2\times 1 mol}=519.5 kJ/mol](https://tex.z-dn.net/?f=%5CDelta%20H_%7BS-O%7D%3D%5Cfrac%7B1039%20kJ%7D%7B2%5Ctimes%201%20mol%7D%3D519.5%20kJ%2Fmol)
The average bond energy of the sulfur-oxygen bonds in sulfur dioxide is 519.5 kJ/mol.
Your answer would D the neutrons have to balance out. I hope this helps.
The percentage of dissolved salt in saltwater
is 3.5%. We are given the amount seawater sample. <span>We would just multiply the two values together.
750 g (0.035) = 26.25 g NaCl
26.25 g NaCl ( 1 mol / 59.44 g ) ( 1 mol Na / 1 mol NaCl ) ( 22.99 g / 1 mol ) = 10.15 g Na
Hope this answers the question. Have a nice day.</span>
The law of conservation of mass states that:
"For any closed system, mass is preserved. This means that the total amount of mass remains constant as mass can neither be created nor destroyed".
Applying this to the decomposition we have,
since the total mass of reactants (water) is 10 grams, therefore, the total mass of products (hydrogen and oxygen) is also 10 grams