Even if you used the right specific heat (c) and temperature change (∆T) for ice, for liquid, and for steam, it does not give you the total amount of energy required for this problem. What is still missing, and explain why that requires energy!

Heat of melting s = 333 kJ/kg and heat of vaporisation r= 2160 kJ/kg

Explanation:

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