Part 1 : does the diagram illustrate an endothermic or exothermic reaction? Give reasons to support your answer.

Part 2: Use the labels on the diagram to describe how you can determine he total change in enthalpy from the diagram. Would you expect the value to be negative or positive?

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.

that's it!

if you need further assistance, let me know: )

~ trueboss72

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este

5.6⋅10−^19  j

do you need the explaination?