Answer and Explanation:
Find enclosed the Lewis diagrams for ozone (O₃) resonance structures. The diagram shows the two main contributing structures (I and II) with their formal charges.
The formal charge (FC) is determined as follows:
FC= number of valence electrons in free atom - 1/2 (number of bonding electrons) - number of non bonding electrons
The O central atom has the formal charge +1:
FC= 6 - 1/2(6) - 2= +1
The O atom on the right in structure I and on the left in structure II has the formal charge -1:
FC= 6 - 1/2(2) - 6= 6 - 1 - 6 = -1
The O atom on the left in structure I and on the right in structure II has the formal charge 0:
FC= 6- 1/2(4) - 4= 6 - 2 - 4= 0
The number of moles of aluminium that are needed to react completely with 13.2 moles of FeO is 8.8 moles
calculation
2Al + 3FeO → 3aFe +Al2O3
by use of of mole ratio of Al: FeO from equation above = 2:3 the moles of Al is therefore
= 13.2 x 2/3=8.8 moles of Al
Time Period 3 (300 BC to 1400 AD)
The alchemists were in pursuit of 2 ideals. First, alchemy came about from the belief that cheap metals can be transmuted to gold using the legendary substance <em>Philosopher's Stone</em> for the conversion. These views were greatly influenced by Aristotle. Thus, from 300 BC to 1400 AD, alchemists worked to make the conversion of cheap metals to gold a reality. However, it never succeeded.
After this, the second ideal that the alchemists were in pursuit of was the concoction of an elixir of life to enable people to live longer and cure all ailments. This took place in the 1500s up to the end of the 1600s. Just like the pursuit of the first ideal, efforts to succeed in the second one all led to failure.
Delta energy on labelled diagram is attached below
