<span>You need information that you haven't provided in the question. Perhaps your text has a table of ΔGof for these compounds. In that case,
ΔGorxn = Sum of ΔGof products - ΔGof reactants
Just plug in the values that you find and calculate the free energy change of the reaction</span>
<span>The atomic number tells you how many _PROTONS_ are in the _NUCLEUS_ of an atom of that element. :)</span>
Hi!
Claudius Ptolemy was an astronomer who wrote the only surviving ancient treatise on astronomy. He proposed his famous theory on the Almagest. In this model, the Earth was on the center, and the Moon, Mercury, Venus, the Sun, Mars, Jupiter, Saturn, and the stars (in that order) were rotating around the Earth.
This famous theory is called the Geocentric Theory (Teoria Geocêntrica in Portuguese).