Which two ordered pairs are solutions for the equation [tex]y=-2 x+4[/tex]?
A. (6,-1)
B. (1,2)
C. (0,4)
D. (-2,3)
Answer (2)
The balanced chemical equation for the reaction of iron with oxygen to form iron (III) oxide is 4 F e ( s ) + 3 O 2 ( g ) → 2 F e 2 O 3 ( s ) .
When iron reacts with oxygen, it forms iron (III) oxide through a combustion reaction. The fine wires of iron burn rapidly in the presence of oxygen to form this compound. The balanced chemical equation for this reaction is:
4 F e ( s ) + 3 O 2 ( g ) → 2 F e 2 O 3 ( s )
Here, the iron (Fe) is in its elemental form and has an oxidation state of zero. When it reacts with oxygen ( O 2 ) , it forms iron (III) oxide ( F e 2 O 3 ) , where iron has an oxidation state of +3.
Iron reacts with oxygen to form iron (III) oxide according to the balanced equation 4 Fe + 3 O₂ → 2 Fe₂O₃. This illustrates a combustion reaction where iron is oxidized from an oxidation state of 0 to +3. The visual result of this reaction is often seen as rusting in everyday life.
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