What is the correct enthalpy diagram using the hess law for this system?

What neutral atom is isoelectronic to mn+4

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Calcium chloride +gold(1) oxide—>