31. 2076 Set B Q. No. 25 Define bond dissociation energy. The bond dissociation energy of H2 (g) and Cl2 (g) are 435 KJ/mol and 243 KJ/mol respectively. The enthalpy of formation of HCl (g) -92 KJ/mol. Calculate the bond dissociation energy of HCl (g). [1+4] Ans. *431 KJ/mol

i am going to put the answers in order i dint feel like typing it out so yeah

a

d

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d

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d

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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c

explanation: