Answer: 0.360 moles
Explanation:
To calculate the moles :


The balanced chemical reaction is:
According to stoichiometry :
2 moles of require = 3 moles of
Thus 0.240 moles of
will require=
of 
Thus 0.360 moles of chlorine needed to react to produce 38.9 of iron (III) chloride.
Because in SI, the expectation is that area and volume will be expressed in terms of a linear dimension( the metre) or its multiples.
Réduction refers to loss of oxygen from that element
<u>Answer:</u> The chemical symbol of the compound formed is
or 
<u>Explanation:</u>
An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).
The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.
Element X has the atomic number 11 which is sodium. The electronic configuration of it is 
This element will lose 1 electron to form
ion of 
Chlorine has the atomic number 17. The electronic configuration of it is 
This element will gain 1 electron to form
ion
When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of
or 
Hence, the chemical symbol of the compound formed is
or 