Need with this equation! can anybody lay out an answer ?
use this equation; 4fe + 3o2 -> 2fe2o3.
if 96.0 grams of oxygen react, what mass of iron was oxidized?
a.) 32.0 g
b.) 96.0 g
c.) 167 g
d.) 223 g
!

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.